/* ==========================================================================
   开云安装 · 共享站点样式  /assets/site.css
   设计语言：深夜赛场数据室 —— 堆叠面板 / 精密网格 / 锐利直角 / 数据前置
   ========================================================================== */

/* ---------------------------------------------------------------
   1. 变量
   --------------------------------------------------------------- */
:root {
  /* 色彩 */
  --ink-950: #061529;
  --ink-900: #0B1E3A;
  --ink-800: #12294A;
  --line: #1E3A5F;
  --green: #00A650;
  --green-deep: #00753A;
  --amber: #FFB300;
  --red: #E53935;
  --paper: #F4F7FA;
  --text-1: #EAF0F8;
  --text-2: #9FB2CC;
  --text-dark: #0B1E3A;
  --on-green: #04121F;

  /* 字体 */
  --font-head: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", "Heiti SC", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --font-cond: "Oswald", "Arial Narrow", "Helvetica Neue Condensed", "PingFang SC", sans-serif;

  /* 七级字号 */
  --fs-12: 12px;
  --fs-14: 14px;
  --fs-16: 16px;
  --fs-20: 20px;
  --fs-28: 28px;
  --fs-40: 40px;
  --fs-64: 64px;

  /* 骨架尺寸 */
  --rail-w: 272px;
  --ticker-h: 32px;
  --bar-h: 56px;
  --gutter: clamp(20px, 4vw, 64px);
  --content-max: 1280px;
  --gap-line: 1px;
  --section-y: clamp(48px, 7vw, 96px);

  /* 动效 */
  --ease: cubic-bezier(.22, .61, .36, 1);
}

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

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

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

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

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

button, input, select, textarea { font: inherit; color: inherit; border-radius: 0; }

a { color: inherit; text-decoration: none; }

table { border-collapse: collapse; width: 100%; }

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

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

/* ---------------------------------------------------------------
   3. 站点基底
   --------------------------------------------------------------- */
body {
  margin: 0;
  background-color: var(--ink-950);
  color: var(--text-1);
  font-family: var(--font-body);
  font-size: var(--fs-16);
  line-height: 1.75;
  padding-top: var(--ticker-h);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

#main-content {
  display: block;
  scroll-margin-top: calc(var(--ticker-h) + 24px);
}

/* ---------------------------------------------------------------
   4. 排版
   --------------------------------------------------------------- */
h1, .h1 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(var(--fs-40), 5.4vw, var(--fs-64));
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--text-1);
  text-wrap: balance;
}

h2, .h2 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(var(--fs-28), 3.4vw, var(--fs-40));
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--text-1);
}

h3, .h3 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(var(--fs-20), 2.2vw, var(--fs-28));
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--text-1);
}

h4, .h4 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: var(--fs-20);
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-cond);
  font-size: var(--fs-12);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--green);
}

.data {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
  letter-spacing: -0.01em;
}

.muted { color: var(--text-2); }

.prose {
  max-width: 40em;
  font-size: 17px;
  line-height: 1.75;
  color: var(--text-2);
}

.prose > * + * { margin-top: 1.25em; }

.prose p { margin: 0; }

.prose strong { color: var(--text-1); font-weight: 700; }

.prose a {
  color: var(--green);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

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

.prose ul,
.prose ol { padding-left: 1.2em; }

.prose li + li { margin-top: 0.5em; }

.prose blockquote {
  border-left: 2px solid var(--green);
  padding-left: 18px;
  color: var(--text-1);
  font-size: var(--fs-20);
  line-height: 1.6;
}

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

.section { padding-block: var(--section-y); }

.section--tight { padding-block: clamp(28px, 4vw, 56px); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px 24px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  margin-bottom: clamp(24px, 3vw, 40px);
}

.section-head__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(var(--fs-20), 2.4vw, var(--fs-28));
  letter-spacing: -0.02em;
  line-height: 1.15;
}

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

.stack { display: flex; flex-direction: column; gap: clamp(16px, 2vw, 28px); }

.stack--tight { gap: 10px; }

/* ---------------------------------------------------------------
   6. 堆叠面板
   --------------------------------------------------------------- */
.panel {
  position: relative;
  background: var(--ink-900);
  border: 1px solid var(--line);
  padding: clamp(20px, 3vw, 40px);
}

.panel--raise { background: var(--ink-800); }

.panel--quiet { background: transparent; }

.panel--paper {
  background: var(--paper);
  border-color: #D5DEE9;
  color: var(--text-dark);
}

.panel--paper h2,
.panel--paper h3,
.panel--paper h4,
.panel--paper .section-head__title { color: var(--text-dark); }

.panel--paper .prose { color: #33465E; }

.panel__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 20px;
  padding-bottom: 14px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.panel--paper .panel__head { border-bottom-color: #D5DEE9; }

.panel__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: var(--fs-20);
  letter-spacing: -0.015em;
}

/* 1px 线网格：gap 即网格线 */
.grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--gap-line);
  background-color: var(--line);
  border: 1px solid var(--line);
}

.grid > * { background-color: var(--ink-900); }

.grid--bare {
  background-color: transparent;
  border: 0;
  gap: clamp(16px, 2.4vw, 32px);
}

.grid--bare > * { background-color: transparent; }

/* ---------------------------------------------------------------
   7. 统计与标签
   --------------------------------------------------------------- */
.stat { display: flex; flex-direction: column; gap: 6px; }

.stat__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(var(--fs-28), 4vw, var(--fs-40));
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--amber);
}

.stat__label {
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: var(--text-2);
  text-transform: uppercase;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  font-size: var(--fs-12);
  font-weight: 700;
  letter-spacing: 0.04em;
  border: 1px solid var(--line);
  color: var(--text-2);
  background: transparent;
  white-space: nowrap;
}

.tag--injury { border-color: var(--red); color: var(--red); }

.tag--transfer { border-color: var(--green); color: var(--green); }

.tag--odds { border-color: var(--amber); color: var(--amber); }

/* ---------------------------------------------------------------
   8. 表格
   --------------------------------------------------------------- */
.table {
  width: 100%;
  font-size: var(--fs-14);
  border: 1px solid var(--line);
}

.table th,
.table td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.table thead th {
  font-size: var(--fs-12);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-2);
  background: var(--ink-800);
  font-weight: 700;
}

.table tbody tr:last-child td { border-bottom: 0; }

.table tbody tr:hover td { background: rgba(0, 166, 80, 0.06); }

.table .data { color: var(--amber); }

/* ---------------------------------------------------------------
   9. 按钮
   --------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6em;
  padding: 12px 22px;
  font-family: var(--font-body);
  font-size: var(--fs-14);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.2;
  border: 1px solid var(--green);
  background: transparent;
  color: var(--green);
  cursor: pointer;
  transition: background-color .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}

.btn:hover,
.btn:focus-visible {
  background: var(--green);
  color: var(--on-green);
  text-decoration: none;
}

.btn--solid {
  background: var(--green);
  color: var(--on-green);
}

.btn--solid:hover,
.btn--solid:focus-visible {
  background: var(--green-deep);
  border-color: var(--green-deep);
  color: #FFFFFF;
}

.btn--ghost { border-color: var(--line); color: var(--text-1); }

.btn--ghost:hover,
.btn--ghost:focus-visible {
  border-color: var(--text-1);
  background: var(--ink-800);
  color: var(--text-1);
}

.btn--amber { border-color: var(--amber); color: var(--amber); }

.btn--amber:hover,
.btn--amber:focus-visible { background: var(--amber); color: var(--ink-950); }

/* ---------------------------------------------------------------
   10. 面包屑
   --------------------------------------------------------------- */
.breadcrumb {
  padding-block: 20px 0;
  font-size: var(--fs-12);
  color: var(--text-2);
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.breadcrumb__item { display: inline-flex; align-items: center; gap: 8px; }

.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: var(--line);
}

.breadcrumb__item a { color: var(--text-2); }

.breadcrumb__item a:hover { color: var(--green); }

.breadcrumb__item [aria-current="page"] { color: var(--text-1); }

/* ---------------------------------------------------------------
   11. 图片容器（页面阶段放置 <img> 占位）
   --------------------------------------------------------------- */
.figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-800);
  overflow: hidden;
}

.figure__media {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 32px 32px;
  background-position: -1px -1px;
}

.figure__media > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.figure__media--wide { aspect-ratio: 21 / 9; }

.figure__media--square { aspect-ratio: 1 / 1; }

.figure__media--tall { aspect-ratio: 4 / 5; }

.figure__caption {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-size: var(--fs-12);
  color: var(--text-2);
  line-height: 1.6;
}

.panel--paper .figure { border-color: #D5DEE9; background: #E4EAF1; }

/* ---------------------------------------------------------------
   12. 顶部比分滚动条
   --------------------------------------------------------------- */
.ticker {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--ticker-h);
  display: flex;
  align-items: center;
  background: var(--ink-950);
  border-bottom: 1px solid var(--line);
  z-index: 90;
  overflow: hidden;
}

.ticker__badge {
  flex: none;
  height: 100%;
  display: inline-flex;
  align-items: center;
  padding-inline: 12px;
  background: var(--green);
  color: var(--on-green);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.ticker__viewport {
  flex: 1 1 auto;
  height: 100%;
  overflow: hidden;
}

.ticker__track {
  display: flex;
  align-items: center;
  height: 100%;
  width: max-content;
  animation: ticker-scroll 56s linear infinite;
}

@keyframes ticker-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

.ticker__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding-inline: 22px;
  height: 100%;
  font-size: var(--fs-12);
  color: var(--text-2);
  white-space: nowrap;
  border-right: 1px solid var(--line);
}

.ticker__item em {
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--green);
}

.ticker__item b { color: var(--text-1); font-weight: 700; }

.ticker__score {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  color: var(--amber);
}

.ticker__score i { font-style: normal; color: var(--text-2); margin-inline: 1px; }

.ticker__range {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--amber);
}

.ticker__flag {
  font-family: var(--font-mono);
  color: var(--red);
  font-weight: 700;
}

/* ---------------------------------------------------------------
   13. 滚动进度条
   --------------------------------------------------------------- */
.scroll-progress {
  position: fixed;
  top: calc(var(--ticker-h) - 2px);
  left: 0;
  right: 0;
  height: 2px;
  z-index: 92;
  background: transparent;
  transform-origin: 0 50%;
  transform: scaleX(0);
  transition: opacity .25s var(--ease);
  opacity: 0;
  pointer-events: none;
}

.scroll-progress[data-active] { opacity: 1; }

.scroll-progress::after {
  content: "";
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--green), var(--amber));
}

/* 进度条由 JS 通过 transform 驱动，因此这里只放静态外观 */

/* ---------------------------------------------------------------
   14. 侧边轨道导航 / 移动抽屉
   --------------------------------------------------------------- */
.site-header { position: static; }

.skip-link {
  position: fixed;
  left: 12px;
  top: -90px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--green);
  color: var(--on-green);
  font-size: var(--fs-14);
  font-weight: 700;
  transition: top .18s var(--ease);
}

.skip-link:focus { top: 12px; text-decoration: none; }

.site-rail {
  position: fixed;
  top: var(--ticker-h);
  left: 0;
  right: 0;
  height: var(--bar-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-inline: 16px;
  background: var(--ink-900);
  border-bottom: 1px solid var(--line);
  z-index: 88;
}

.site-rail__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  min-width: 0;
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand:hover { text-decoration: none; }

.brand__mark {
  flex: none;
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--green);
  color: var(--on-green);
  font-family: var(--font-cond);
  font-size: var(--fs-20);
  font-weight: 700;
  letter-spacing: 0;
  transition: background-color .18s var(--ease), color .18s var(--ease);
}

.brand:hover .brand__mark {
  background: var(--amber);
  color: var(--ink-950);
}

.brand__text { display: flex; flex-direction: column; min-width: 0; }

.brand__name {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 17px;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--text-1);
}

.brand__meta {
  display: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.02em;
  line-height: 1.5;
  color: var(--text-2);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 汉堡按钮 */
.nav-toggle {
  flex: none;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--text-1);
  font-size: var(--fs-12);
  font-weight: 700;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: border-color .18s var(--ease), color .18s var(--ease);
}

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

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 18px;
  height: 10px;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: currentColor;
  transition: transform .22s var(--ease);
}

.nav-toggle__bars::before { top: 0; }

.nav-toggle__bars::after { bottom: 0; }

.site-rail[data-open] .nav-toggle__bars::before { transform: translateY(4px) rotate(45deg); }

.site-rail[data-open] .nav-toggle__bars::after { transform: translateY(-4px) rotate(-45deg); }

/* 移动端抽屉 */
.site-nav {
  position: fixed;
  top: calc(var(--ticker-h) + var(--bar-h));
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  flex-direction: column;
  padding: 8px 0 40px;
  background: var(--ink-950);
  border-top: 1px solid var(--line);
  overflow-y: auto;
  z-index: 87;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: opacity .22s var(--ease), transform .22s var(--ease), visibility .22s var(--ease);
}

.site-rail[data-open] .site-nav {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.site-nav__list { list-style: none; margin: 0; padding: 0; }

.site-nav__item + .site-nav__item { border-top: 1px solid var(--line); }

.site-nav__item a {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
  border-left: 3px solid transparent;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-2);
  transition: color .18s var(--ease), background-color .18s var(--ease), border-color .18s var(--ease);
}

.site-nav__item a:hover {
  color: var(--text-1);
  background: var(--ink-800);
  text-decoration: none;
}

.site-nav__item a[aria-current="page"] {
  color: var(--green);
  border-left-color: var(--green);
  background: linear-gradient(90deg, rgba(0, 166, 80, 0.16), rgba(0, 166, 80, 0));
}

.site-nav__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--line);
}

.site-nav__item a[aria-current="page"] .site-nav__idx,
.site-nav__item a:hover .site-nav__idx { color: var(--amber); }

.site-nav__tools {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 20px;
  margin-top: auto;
  border-top: 1px solid var(--line);
}

.tool-link {
  padding: 6px 10px;
  border: 1px solid var(--line);
  font-size: var(--fs-12);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text-2);
  transition: border-color .18s var(--ease), color .18s var(--ease), background-color .18s var(--ease);
}

.tool-link:hover {
  border-color: var(--green);
  color: var(--green);
  background: rgba(0, 166, 80, 0.08);
  text-decoration: none;
}

/* ---------------------------------------------------------------
   15. 页脚
   --------------------------------------------------------------- */
.site-footer {
  margin-top: clamp(48px, 8vw, 104px);
  border-top: 1px solid var(--line);
  background: var(--ink-900);
  padding-block: clamp(36px, 5vw, 64px) clamp(20px, 3vw, 32px);
}

.site-footer__inner {
  width: min(100% - (var(--gutter) * 2), var(--content-max));
  margin-inline: auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
}

.site-footer__brand {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: var(--fs-28);
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--text-1);
}

.site-footer__intro {
  margin-top: 12px;
  max-width: 34em;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--text-2);
}

.site-footer__navline { margin-top: 18px; }

.footer-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: var(--fs-14);
  font-weight: 700;
  color: var(--green);
  border-bottom: 1px solid transparent;
  transition: border-color .18s var(--ease), color .18s var(--ease);
}

.footer-link:hover {
  color: var(--amber);
  border-bottom-color: var(--amber);
  text-decoration: none;
}

.site-footer__nav {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: clamp(20px, 3vw, 40px);
}

.footer-col__title {
  font-family: var(--font-cond);
  font-size: var(--fs-12);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-2);
  padding-bottom: 10px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.footer-col__list { list-style: none; margin: 0; padding: 0; }

.footer-col__list li + li { margin-top: 8px; }

.footer-col__list a {
  font-size: var(--fs-14);
  color: var(--text-2);
  transition: color .18s var(--ease), padding-left .18s var(--ease);
}

.footer-col__list a:hover {
  color: var(--green);
  padding-left: 4px;
  text-decoration: none;
}

.site-footer__contact {
  width: min(100% - (var(--gutter) * 2), var(--content-max));
  margin: clamp(28px, 4vw, 48px) auto 0;
  padding-top: clamp(20px, 3vw, 28px);
  border-top: 1px solid var(--line);
  display: grid;
  gap: 6px;
  font-size: var(--fs-14);
  color: var(--text-2);
}

.site-footer__contact .data { color: var(--text-1); }

.site-footer__base {
  width: min(100% - (var(--gutter) * 2), var(--content-max));
  margin: clamp(20px, 3vw, 28px) auto 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-size: var(--fs-12);
  color: var(--text-2);
}

.site-footer__legal { letter-spacing: 0.02em; }

/* 回到顶部 */
.to-top {
  position: fixed;
  right: clamp(14px, 3vw, 32px);
  bottom: clamp(14px, 3vw, 32px);
  z-index: 86;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: var(--ink-800);
  border: 1px solid var(--line);
  color: var(--text-1);
  font-size: var(--fs-12);
  font-weight: 700;
  letter-spacing: 0.06em;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity .22s var(--ease), transform .22s var(--ease), visibility .22s var(--ease), border-color .18s var(--ease), color .18s var(--ease);
}

.to-top[data-shown] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.to-top:hover {
  border-color: var(--green);
  color: var(--green);
}

/* ---------------------------------------------------------------
   16. 显现
   --------------------------------------------------------------- */
html[data-js] [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}

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

/* ---------------------------------------------------------------
   17. 响应式
   --------------------------------------------------------------- */
@media (min-width: 640px) {
  .grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 768px) {
  .site-footer__inner { grid-template-columns: minmax(0, 1fr) minmax(0, 1.6fr); }
  .site-footer__contact { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .site-footer__contact p:last-child { grid-column: 1 / -1; }
}

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

  .scroll-progress { left: var(--rail-w); }

  .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid--wide { grid-template-columns: repeat(8, minmax(0, 1fr)); }
  .grid--narrow { grid-template-columns: repeat(4, minmax(0, 1fr)); }

  .site-rail {
    top: var(--ticker-h);
    bottom: 0;
    right: auto;
    width: var(--rail-w);
    height: auto;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    padding-inline: 0;
    border-bottom: 0;
    border-right: 1px solid var(--line);
    z-index: 88;
  }

  .site-rail__top {
    flex: none;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    padding: 24px 20px 20px;
    border-bottom: 1px solid var(--line);
  }

  .brand__mark { width: 40px; height: 40px; font-size: var(--fs-28); }

  .brand__name { font-size: var(--fs-20); }

  .brand__meta { display: block; margin-top: 4px; }

  .nav-toggle { display: none; }

  .site-nav {
    position: static;
    flex: 1 1 auto;
    opacity: 1;
    visibility: visible;
    transform: none;
    border-top: 0;
    background: transparent;
    padding: 10px 0 0;
    transition: none;
  }

  .site-nav__item a { padding: 15px 20px; }

  .site-nav__tools { padding: 18px 20px 24px; }

  .to-top { right: 32px; bottom: 32px; }
}

@media (min-width: 1280px) {
  :root { --rail-w: 296px; }
}

/* ---------------------------------------------------------------
   18. 降低动效
   --------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  .ticker__track { animation: none; }

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

  html[data-js] [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }
}