/* ============================================================
   365赔率站 — /assets/site.css
   全站共享外壳：轨道页头 / 赔率条带 / 三层页脚 / 通用组件
   ============================================================ */

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

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

body { margin: 0; }

h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, picture, svg, video { max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: inherit; }
summary { cursor: pointer; }

/* ---------- 2. 变量 ---------- */
:root {
  --green-950: #072A20;
  --green-900: #0B3D2E;
  --green-600: #14543F;
  --cyan: #00E5C3;
  --cyan-soft: #7FF3E4;
  --amber: #F5A623;
  --amber-deep: #C97F0B;
  --amber-soft: #FFD79A;
  --ember: #E4572E;
  --paper: #F4F1E9;
  --paper-200: #E6E1D5;
  --char: #1B2320;
  --moss: #6E7B74;
  --line: #B9C3BC;

  --rail-w: 88px;
  --strip-h: 28px;
  --bar-h: 64px;
  --wrap: 1240px;
  --cut: 14px;

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

  --ease: cubic-bezier(0.22, 0.7, 0.32, 1);
}

/* ---------- 3. 基础排版 ---------- */
body {
  padding-left: var(--rail-w);
  background-color: var(--paper);
  background-image:
    linear-gradient(90deg, rgba(185, 195, 188, 0.28) 1px, transparent 1px);
  background-size: 96px 100%;
  color: var(--char);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 { font-weight: 700; line-height: 1.25; letter-spacing: -0.01em; }

strong { font-weight: 700; }

::selection { background: var(--cyan); color: var(--green-950); }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(11, 61, 46, 0.22);
}

/* ---------- 4. 通用工具 ---------- */
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 3.5vw, 2.75rem);
}

.skip-link {
  position: fixed;
  top: 0.5rem;
  left: 0.5rem;
  z-index: 300;
  transform: translateY(-220%);
  padding: 0.65rem 1.1rem;
  background: var(--cyan);
  color: var(--green-950);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-decoration: none;
  border: 2px solid var(--green-950);
  transition: transform 0.18s var(--ease);
}
.skip-link:focus { transform: translateY(0); }

/* ============================================================
   5. 页头
   ============================================================ */
.site-header { position: relative; z-index: 100; }

/* ---------- 5.1 左侧品牌轨道 ---------- */
.site-rail {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 140;
  width: var(--rail-w);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1.15rem 0 1.25rem;
  background: var(--green-900);
  color: var(--paper);
  border-right: 1px solid var(--green-600);
}

.site-rail__brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.45rem;
  text-decoration: none;
  color: var(--paper);
}
.site-rail__mark {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--cyan);
}
.site-rail__name {
  writing-mode: vertical-rl;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.26em;
  line-height: 1;
  color: var(--paper);
  transition: color 0.2s var(--ease);
}
.site-rail__brand:hover .site-rail__name { color: var(--cyan); }

.site-rail__sep {
  width: 12px;
  height: 2px;
  margin: 1rem 0 0.6rem;
  background: var(--cyan);
}
.site-rail__ver {
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--cyan-soft);
}
.site-rail__tail {
  margin-top: auto;
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.34em;
  color: rgba(244, 241, 233, 0.4);
}

/* ---------- 5.2 吸顶工作区 ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 120;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

/* 赔率条带 */
.odds-strip {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  height: var(--strip-h);
  padding-right: 0.9rem;
  background: var(--green-950);
  color: var(--paper);
  overflow: hidden;
}
.odds-strip__viewport {
  flex: 1 1 auto;
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 28px, #000 calc(100% - 28px), transparent);
  mask-image: linear-gradient(90deg, transparent, #000 28px, #000 calc(100% - 28px), transparent);
}
.odds-strip__track {
  display: flex;
  width: max-content;
  animation: odds-ticker 40s linear infinite;
}
.odds-strip:hover .odds-strip__track { animation-play-state: paused; }

@keyframes odds-ticker {
  from { transform: translate3d(0, 0, 0); }
  to   { transform: translate3d(-50%, 0, 0); }
}

.odds-strip__item {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding-right: 2.2rem;
  white-space: nowrap;
  font-size: 11px;
  letter-spacing: 0.06em;
}
.odds-strip__event { color: rgba(244, 241, 233, 0.82); }
.odds-strip__play {
  padding: 0.05rem 0.35rem;
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--moss);
  border: 1px solid rgba(185, 195, 188, 0.35);
}
.odds-strip__num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.odds-strip__num--up { color: var(--amber); }
.odds-strip__num--down { color: var(--cyan); }

.odds-strip__tag {
  flex: 0 0 auto;
  padding: 0.1rem 0.42rem;
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--cyan);
  border: 1px solid rgba(0, 229, 195, 0.45);
}
.odds-strip__ver {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: rgba(244, 241, 233, 0.55);
}

/* 条目行 */
.topbar__inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: var(--bar-h);
  padding-inline: clamp(0.9rem, 3vw, 2rem);
}

.topbar__label {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex: 0 0 auto;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--green-600);
}
.topbar__label::before {
  content: "";
  width: 10px;
  height: 2px;
  background: var(--amber);
}
.topbar__label-en {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.24em;
  color: var(--moss);
}

.topbar__brand { display: none; }

/* ---------- 5.3 主导航 ---------- */
.nav { margin-left: auto; }

.nav__list {
  display: flex;
  align-items: center;
  gap: 0.1rem;
}

.nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  height: 34px;
  padding: 0 0.7rem;
  color: var(--green-900);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-decoration: none;
  transition: color 0.2s var(--ease);
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 0.7rem;
  right: 0.7rem;
  bottom: 2px;
  height: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.24s var(--ease), background-color 0.24s var(--ease);
}
.nav__link:hover { color: var(--green-600); }
.nav__link:hover::after { transform: scaleX(1); }

.nav__link[aria-current="page"] {
  color: var(--green-950);
  font-weight: 700;
}
.nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--amber);
}

.nav__item--cta { margin-left: 0.55rem; }

.nav__link--cta {
  height: 36px;
  padding: 0 1.05rem;
  color: var(--amber-deep);
  border: 1px solid var(--amber-deep);
  clip-path: polygon(8px 0, 100% 0, 100% 100%, 0 100%, 0 8px);
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease);
}
.nav__link--cta::after { display: none; }
.nav__link--cta:hover {
  background: var(--amber);
  color: var(--green-950);
}
.nav__link--cta[aria-current="page"] {
  background: var(--amber);
  color: var(--green-950);
}

.nav__foot { display: none; }

/* ---------- 5.4 移动按钮 ---------- */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.45rem;
  height: 36px;
  padding: 0 0.75rem;
  background: transparent;
  border: 1px solid var(--green-600);
  color: var(--green-900);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  cursor: pointer;
}
.nav-toggle__icon {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 14px;
  height: 14px;
}
.nav-toggle__icon span {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform 0.2s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__icon span:first-child {
  transform: translateY(3px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__icon span:last-child {
  transform: translateY(-3px) rotate(-45deg);
}

.topbar__cta { display: none; }

/* ---------- 5.5 阅读进度 ---------- */
.read-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  pointer-events: none;
}
.read-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.1s linear;
}

/* ============================================================
   6. 页脚
   ============================================================ */
.site-footer {
  position: relative;
  margin-top: clamp(3rem, 7vw, 6rem);
  padding: clamp(2.5rem, 5vw, 4rem) clamp(1.25rem, 4vw, 3rem) 1.75rem;
  background: var(--green-900);
  color: var(--paper);
  border-top: 1px solid var(--green-600);
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 9px;
  background: repeating-linear-gradient(-45deg, var(--cyan) 0 6px, transparent 6px 15px);
  opacity: 0.45;
}

.foot-top {
  display: grid;
  grid-template-columns: minmax(240px, 1fr) minmax(0, 2.15fr);
  gap: clamp(1.75rem, 4vw, 3.5rem);
  max-width: var(--wrap);
  margin: 0 auto;
}

.foot-brand__link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--paper);
}
.foot-brand__name {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.02em;
}
.foot-brand__ver {
  padding: 0.1rem 0.42rem;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--cyan);
  border: 1px solid rgba(0, 229, 195, 0.45);
}
.foot-brand__note {
  margin: 0.9rem 0 1.4rem;
  max-width: 30ch;
  font-size: 13px;
  line-height: 1.75;
  color: rgba(244, 241, 233, 0.68);
}
.foot-brand__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.foot-cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1.5rem;
}
.foot-col__title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.85rem;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--cyan-soft);
}
.foot-col__title::before {
  content: "";
  width: 8px;
  height: 8px;
  border: 1px solid var(--cyan);
  transform: rotate(45deg);
}
.foot-col ul { display: grid; gap: 0.45rem; }
.foot-col a {
  font-size: 13.5px;
  text-decoration: none;
  color: rgba(244, 241, 233, 0.78);
  transition: color 0.2s var(--ease);
}
.foot-col a:hover { color: var(--cyan); }

/* 旧版入口手风琴 */
.foot-legacy {
  max-width: var(--wrap);
  margin: clamp(2rem, 4vw, 3rem) auto 0;
  border-top: 1px solid var(--green-600);
  border-bottom: 1px solid var(--green-600);
}
.foot-legacy__summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 0.25rem;
  list-style: none;
  font-size: 13px;
  letter-spacing: 0.06em;
}
.foot-legacy__summary::-webkit-details-marker { display: none; }
.foot-legacy__summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1;
  color: var(--amber);
}
.foot-legacy[open] .foot-legacy__summary::after { content: "−"; }
.foot-legacy__title { font-weight: 700; color: var(--paper); }
.foot-legacy__hint {
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: rgba(244, 241, 233, 0.55);
}
.foot-legacy__body {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem;
  padding: 0 0.25rem 1.4rem;
}
.foot-legacy__label {
  margin-bottom: 0.5rem;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--amber-soft);
}
.foot-legacy__list {
  display: grid;
  gap: 0.35rem;
  font-size: 12.5px;
  color: rgba(244, 241, 233, 0.72);
}
.foot-legacy__list li {
  padding-left: 0.85rem;
  position: relative;
}
.foot-legacy__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 5px;
  height: 1px;
  background: var(--moss);
}
.foot-legacy__foot {
  grid-column: 1 / -1;
  font-size: 12px;
  color: rgba(244, 241, 233, 0.55);
}
.foot-legacy__link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 195, 0.45);
}
.foot-legacy__link:hover { color: var(--cyan-soft); }

/* 联系与备案 */
.foot-bottom {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  gap: 1.75rem;
  max-width: var(--wrap);
  margin: clamp(1.5rem, 3vw, 2.25rem) auto 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--green-600);
  font-size: 12.5px;
  color: rgba(244, 241, 233, 0.62);
}

.foot-contact { display: grid; gap: 0.4rem; }
.foot-contact__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}
.foot-contact__label {
  min-width: 2.6em;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--moss);
}
.foot-contact__value {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: rgba(244, 241, 233, 0.9);
  word-break: break-all;
}
.foot-contact__row--wide .foot-contact__value {
  font-family: var(--font-sans);
  letter-spacing: 0.01em;
}
.foot-contact__hint {
  margin-top: 0.35rem;
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: rgba(244, 241, 233, 0.5);
}

.copy-btn {
  padding: 0.1rem 0.45rem;
  background: transparent;
  border: 1px solid rgba(0, 229, 195, 0.45);
  color: var(--cyan);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease);
}
.copy-btn:hover { background: var(--cyan); color: var(--green-950); }

.copy-note {
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--cyan-soft);
  opacity: 0;
  transform: translateY(2px);
  transition: opacity 0.2s var(--ease), transform 0.2s var(--ease);
}
.copy-note[data-visible] {
  opacity: 1;
  transform: translateY(0);
}

.foot-legal {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.45rem;
  text-align: right;
}
.foot-legal__links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}
.foot-legal__links a {
  font-size: 12px;
  text-decoration: none;
  color: rgba(244, 241, 233, 0.8);
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.foot-legal__links a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}
.foot-legal__icp {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: rgba(244, 241, 233, 0.55);
}
.foot-legal__copy {
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: rgba(244, 241, 233, 0.45);
}

/* ============================================================
   7. 通用组件
   ============================================================ */

/* 面包屑 */
.crumbs { padding: 1.25rem 0 0; }
.crumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--moss);
}
.crumbs li { display: inline-flex; align-items: center; gap: 0.5rem; }
.crumbs li + li::before { content: "/"; color: var(--line); }
.crumbs a { text-decoration: none; color: var(--moss); }
.crumbs a:hover { color: var(--green-900); }
.crumbs [aria-current="page"] { color: var(--green-900); font-weight: 700; }

/* 章节头 */
.section-head {
  display: grid;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}
.section-head__index {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.24em;
  color: var(--amber-deep);
}
.section-head__title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  line-height: 1.2;
  color: var(--green-900);
}
.section-head__lead {
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--moss);
}

/* 面板 */
.panel {
  position: relative;
  padding: clamp(1.1rem, 2.4vw, 1.75rem);
  background: var(--paper-200);
  border: 1px solid var(--line);
}
.panel--cut {
  border: 0;
  clip-path: polygon(var(--cut) 0, 100% 0, 100% 100%, 0 100%, 0 var(--cut));
  box-shadow: inset 0 0 0 1px var(--line);
}
.panel--dark {
  background: var(--green-900);
  color: var(--paper);
  border: 0;
  box-shadow: inset 0 0 0 1px var(--green-600);
}
.panel--dark .section-head__title,
.panel--dark h2,
.panel--dark h3 { color: var(--paper); }
.panel--dark .section-head__lead,
.panel--dark p { color: rgba(244, 241, 233, 0.72); }
.panel--quiet {
  background: transparent;
  border: 1px solid var(--line);
}

/* 图片容器 */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--paper-200);
  box-shadow: inset 0 0 0 1px var(--line);
}
.media img,
.media video,
.media svg {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x3 { aspect-ratio: 4 / 3; }
.media--1x1 { aspect-ratio: 1 / 1; }
.media--wide { aspect-ratio: 21 / 9; }
.media--cut {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}
.media__frame {
  position: absolute;
  inset: 0;
  pointer-events: none;
  box-shadow: inset 0 0 0 1px rgba(11, 61, 46, 0.16);
}
.media__caption {
  display: block;
  margin-top: 0.6rem;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--moss);
}

/* 栅格 */
.grid { display: grid; gap: clamp(1rem, 2.2vw, 1.6rem); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid--cards { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

/* 标签 */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.3em;
  padding: 0.16em 0.5em;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--moss);
  background: var(--paper);
  border: 1px solid var(--line);
}
.tag--cyan {
  color: var(--green-900);
  background: rgba(0, 229, 195, 0.16);
  border-color: var(--green-600);
}
.tag--amber {
  color: var(--amber-deep);
  background: rgba(245, 166, 35, 0.14);
  border-color: var(--amber-deep);
}
.tag--ember {
  color: var(--ember);
  background: rgba(228, 87, 46, 0.1);
  border-color: var(--ember);
}

/* 等宽数字 */
.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  letter-spacing: 0;
}
.num--lg {
  font-size: 1.9em;
  line-height: 1;
}
.panel--dark .num--lg { color: var(--cyan); }

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45em;
  min-height: 42px;
  padding: 0 1.15rem;
  font-family: inherit;
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-decoration: none;
  color: var(--green-900);
  background: transparent;
  border: 1px solid var(--green-900);
  cursor: pointer;
  transition: background-color 0.22s var(--ease), color 0.22s var(--ease), border-color 0.22s var(--ease), transform 0.22s var(--ease);
}
.btn:hover { transform: translateY(-2px); }

.btn--solid {
  background: var(--green-900);
  color: var(--paper);
  border-color: var(--green-900);
}
.btn--solid:hover {
  background: var(--green-600);
  border-color: var(--green-600);
}

.btn--cyan {
  background: var(--cyan);
  color: var(--green-950);
  border-color: var(--cyan);
}
.btn--cyan:hover { background: var(--cyan-soft); border-color: var(--cyan-soft); }

.btn--ghost {
  background: transparent;
  color: var(--green-900);
  border-color: var(--line);
}
.btn--ghost:hover {
  border-color: var(--cyan);
  color: var(--green-950);
}

.site-footer .btn--ghost {
  color: var(--paper);
  border-color: rgba(244, 241, 233, 0.35);
}
.site-footer .btn--ghost:hover {
  color: var(--cyan);
  border-color: var(--cyan);
}

/* 长文 */
.prose {
  max-width: 72ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--char);
}
.prose p + p { margin-top: 1em; }
.prose h2,
.prose h3 {
  margin: 1.9em 0 0.6em;
  color: var(--green-900);
  line-height: 1.3;
}
.prose h2 { font-size: clamp(1.25rem, 2.4vw, 1.6rem); }
.prose h3 { font-size: 1.075rem; }
.prose ul,
.prose ol { padding-left: 1.2em; margin: 0.8em 0; }
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li + li { margin-top: 0.4em; }
.prose a {
  color: var(--green-600);
  text-decoration: underline;
  text-decoration-color: var(--cyan);
  text-underline-offset: 3px;
}
.prose a:hover { color: var(--green-900); }
.prose blockquote {
  margin: 1.4em 0;
  padding: 0.2em 0 0.2em 1.1em;
  border-left: 3px solid var(--amber);
  color: var(--green-600);
}

/* 索引链接 / 章节高亮 */
.toc-link {
  display: block;
  padding: 0.42rem 0.6rem 0.42rem 0.9rem;
  border-left: 2px solid var(--line);
  color: var(--moss);
  font-size: 13px;
  text-decoration: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}
.toc-link:hover {
  color: var(--green-900);
  border-left-color: var(--green-600);
}
.toc-link[aria-current="true"] {
  color: var(--green-950);
  font-weight: 700;
  border-left-color: var(--cyan);
  background: rgba(0, 229, 195, 0.12);
}

/* 分隔 */
.rule {
  height: 1px;
  margin: 2rem 0;
  border: 0;
  background: var(--line);
}
.rule--diag {
  height: 10px;
  background: repeating-linear-gradient(-45deg, var(--line) 0 1px, transparent 1px 8px);
}

/* ============================================================
   8. 平板 / 移动
   ============================================================ */
@media (max-width: 1180px) {
  .topbar__label-en { display: none; }
  .nav__link { padding: 0 0.52rem; font-size: 13.5px; }
  .nav__link::after { left: 0.52rem; right: 0.52rem; }
}

@media (max-width: 1023px) {
  :root { --bar-h: 56px; }

  body {
    padding-left: 0;
    background-image: none;
  }

  .site-rail { display: none; }

  html.nav-locked { overflow: hidden; }

  .topbar__inner {
    gap: 0.6rem;
    padding-inline: 1rem;
  }

  .topbar__label { display: none; }

  .topbar__brand {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    margin-right: auto;
    text-decoration: none;
    color: var(--green-900);
  }
  .topbar__brand-cn {
    font-size: 15px;
    font-weight: 800;
    letter-spacing: 0.04em;
  }
  .topbar__brand-ver {
    padding: 0.06rem 0.3rem;
    font-family: var(--font-mono);
    font-size: 9.5px;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--green-600);
    border: 1px solid var(--line);
  }

  .topbar__cta {
    display: inline-flex;
    align-items: center;
    height: 36px;
    padding: 0 0.85rem;
    background: var(--cyan);
    color: var(--green-950);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 0.06em;
    text-decoration: none;
    clip-path: polygon(8px 0, 100% 0, 100% 100%, 0 100%, 0 8px);
  }

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

  .nav {
    position: fixed;
    top: calc(var(--strip-h) + var(--bar-h));
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    margin: 0;
    padding: 1rem 1.25rem 1.5rem;
    max-height: calc(100vh - var(--strip-h) - var(--bar-h));
    overflow-y: auto;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 22px 46px -26px rgba(7, 42, 32, 0.55);
  }
  .nav[data-open] { display: flex; }

  .nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
  }
  .nav__link {
    width: 100%;
    height: 50px;
    padding: 0 0.25rem;
    font-size: 16px;
    border-bottom: 1px solid var(--paper-200);
  }
  .nav__link::after {
    left: 0.25rem;
    right: auto;
    width: 26px;
    bottom: 0;
  }
  .nav__item--cta { margin: 1rem 0 0; }
  .nav__link--cta {
    height: 46px;
    justify-content: center;
    padding: 0 1rem;
    border-bottom: 0;
  }
  .nav__link--cta[aria-current="page"] { border-bottom: 0; }

  .nav__foot {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    margin-top: 1.1rem;
  }
  .nav__foot .btn { flex: 1 1 140px; }

  .odds-strip__ver { display: none; }

  .foot-top { grid-template-columns: 1fr; }
  .foot-bottom { grid-template-columns: 1fr; }
  .foot-legal { align-items: flex-start; text-align: left; }
}

@media (max-width: 768px) {
  .grid--2,
  .grid--3,
  .grid--4 { grid-template-columns: 1fr; }
  .foot-legacy__body { grid-template-columns: 1fr; }
  .odds-strip__tag { display: none; }
}

@media (max-width: 480px) {
  .topbar__brand-cn { font-size: 14px; }
  .topbar__cta { padding: 0 0.6rem; font-size: 12px; }
  .nav-toggle { padding: 0 0.6rem; }
  .foot-cols { grid-template-columns: 1fr; }
  .foot-brand__actions .btn { flex: 1 1 100%; }
}

/* ============================================================
   9. 减弱动效
   ============================================================ */
@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;
  }

  .odds-strip__track {
    animation: none;
    transform: none;
  }
  .btn:hover { transform: none; }
}