/* ==========================================================================
   八方体育 · 共享样式表 /assets/site.css
   夜场数据台：深墨蓝底 + 荧光青强调 + 刻度框景 + 侧轨导航
   ========================================================================== */

/* ---------- 变量 ---------- */
:root {
  --ink-950: #050A14;
  --ink-900: #0A1220;
  --ink-800: #111C2E;
  --line-600: #22304A;
  --text-hi: #E6EDF7;
  --text-mid: #93A3BC;
  --cyan-400: #29E7D6;
  --cyan-700: #0E8F87;
  --amber-500: #FFB020;
  --violet-500: #7C6BFF;
  --up-400: #3DD68C;
  --down-400: #FF5F72;

  --font-head: "Source Han Sans SC", "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-num: "JetBrains Mono", "SFMono-Regular", ui-monospace, Consolas, monospace;
  --font-body: "Source Han Serif SC", "Songti SC", "Noto Serif SC", serif;

  --dur-fast: 120ms;
  --dur-base: 280ms;
  --dur-slow: 420ms;
  --ease: cubic-bezier(.2, .7, .3, 1);

  --rail-w: 72px;
  --topbar-h: 58px;
  --maxw: 1280px;
  --pad: 20px;
}

@media (min-width: 768px) { :root { --pad: 32px; } }
@media (min-width: 1024px) { :root { --pad: 48px; --rail-w: 88px; } }
@media (min-width: 1440px) { :root { --pad: 72px; } }

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

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

body {
  margin: 0;
  background: var(--ink-950);
  color: var(--text-hi);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, svg, video { display: block; max-width: 100%; }
a { color: inherit; }
button { font: inherit; color: inherit; }
ul, ol { margin: 0; padding: 0; list-style: none; }
table { border-collapse: collapse; width: 100%; }
p { margin: 0 0 1.1em; }
p:last-child, ul:last-child, ol:last-child { margin-bottom: 0; }

h1, h2, h3, h4, h5 {
  margin: 0 0 .6em;
  font-family: var(--font-head);
  font-weight: 500;
  line-height: 1.25;
  letter-spacing: .005em;
  color: var(--text-hi);
}
h1 { font-size: clamp(28px, 4.6vw, 46px); font-weight: 700; }
h2 { font-size: clamp(22px, 3vw, 32px); }
h3 { font-size: 18px; }
h4 { font-size: 16px; }

::selection { background: var(--cyan-700); color: #02110F; }

:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 2px;
  border-radius: 2px;
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ---------- 跳过导航 ---------- */
.skip-link {
  position: fixed;
  top: -70px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 300;
  padding: 10px 20px;
  background: var(--cyan-400);
  color: var(--ink-950);
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: .04em;
  transition: top var(--dur-base) var(--ease);
}
.skip-link:focus { top: 12px; }

/* ---------- 布局容器 ---------- */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.section { padding-block: clamp(56px, 8vw, 104px); }
.section--tight { padding-block: clamp(36px, 5vw, 64px); }
.section--alt { background: var(--ink-900); }
.section--deep { background: var(--ink-950); }

/* ---------- 主内容偏移（侧轨不占栅格） ---------- */
@media (max-width: 767px) {
  body { padding-top: var(--topbar-h); }
}
@media (min-width: 768px) {
  body { padding-left: var(--rail-w); padding-top: 0; }
}

html.nav-locked { overflow: hidden; }

/* ==========================================================================
   侧边轨道 header
   ========================================================================== */
.site-rail {
  position: fixed;
  z-index: 60;
  background: var(--ink-900);
  color: var(--text-hi);
}

/* 桌面：左侧竖向轨道 */
@media (min-width: 768px) {
  .site-rail {
    top: 0; left: 0; bottom: 0;
    width: var(--rail-w);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 16px 0 18px;
    border-right: 1px solid var(--line-600);
    border-bottom: 0;
  }
  .site-rail::after {
    content: "";
    position: absolute;
    top: 0; right: -6px; bottom: 0;
    width: 6px;
    background: repeating-linear-gradient(to bottom, var(--line-600) 0 1px, transparent 1px 18px);
    pointer-events: none;
    opacity: .85;
  }
}

/* 移动：顶部窄条 */
@media (max-width: 767px) {
  .site-rail {
    top: 0; left: 0; right: 0;
    height: var(--topbar-h);
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0 14px;
    border-bottom: 1px solid var(--line-600);
    background: rgba(10, 18, 32, .96);
  }
  .site-rail::after {
    content: "";
    position: absolute;
    left: 0; right: 0; bottom: -5px;
    height: 5px;
    background: repeating-linear-gradient(to right, var(--line-600) 0 1px, transparent 1px 18px);
    pointer-events: none;
    opacity: .7;
  }
}

/* 滚动进度光带 */
@media (min-width: 768px) {
  .rail__progress {
    position: absolute;
    top: 0; right: -1px; bottom: 0;
    width: 2px;
    pointer-events: none;
    z-index: 2;
  }
  .rail__progress::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, var(--cyan-400), var(--violet-500));
    transform: scaleY(var(--progress, 0));
    transform-origin: top center;
    transition: transform 90ms linear;
    opacity: .95;
  }
}
@media (max-width: 767px) {
  .rail__progress {
    position: absolute;
    left: 0; right: 0; bottom: -1px;
    height: 2px;
    pointer-events: none;
    z-index: 2;
  }
  .rail__progress::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, var(--cyan-400), var(--violet-500));
    transform: scaleX(var(--progress, 0));
    transform-origin: left center;
    transition: transform 90ms linear;
  }
}

/* 品牌 */
.rail__brand {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: var(--text-hi);
}

@media (min-width: 768px) {
  .rail__brand {
    flex-direction: column;
    gap: 8px;
    width: 100%;
    padding: 4px 0 16px;
    border-bottom: 1px solid var(--line-600);
  }
  .rail__brand-cn {
    writing-mode: vertical-rl;
    font-family: var(--font-head);
    font-size: 14px;
    font-weight: 700;
    letter-spacing: .16em;
    color: var(--text-hi);
  }
  .rail__brand-sub {
    writing-mode: vertical-rl;
    font-family: var(--font-num);
    font-size: 10px;
    letter-spacing: .22em;
    color: var(--cyan-400);
  }
}

@media (max-width: 767px) {
  .rail__brand { flex-direction: row; gap: 8px; flex: 0 0 auto; }
  .rail__brand-cn {
    font-family: var(--font-head);
    font-size: 15px;
    font-weight: 700;
    letter-spacing: .02em;
  }
  .rail__brand-sub {
    font-family: var(--font-num);
    font-size: 10px;
    letter-spacing: .12em;
    color: var(--cyan-400);
    border: 1px solid var(--cyan-700);
    padding: 1px 6px;
    line-height: 1.5;
  }
}

/* 导航 */
.rail__list { width: 100%; }

@media (min-width: 768px) {
  .rail__nav {
    width: 100%;
    flex: 1 1 auto;
    overflow-y: auto;
    overflow-x: hidden;
    padding-top: 6px;
    scrollbar-width: thin;
  }
  .rail__list { display: flex; flex-direction: column; }
  .rail__item + .rail__item { border-top: 1px solid rgba(34, 48, 74, .6); }
  .rail__link {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    min-height: 58px;
    padding: 12px 0;
    color: var(--text-mid);
    text-decoration: none;
    transition: color var(--dur-fast) var(--ease), background var(--dur-base) var(--ease);
  }
  .rail__link::before {
    content: attr(data-index);
    font-family: var(--font-num);
    font-size: 10px;
    letter-spacing: .1em;
    color: var(--line-600);
    transition: color var(--dur-fast) var(--ease);
  }
  .rail__label {
    writing-mode: vertical-rl;
    font-family: var(--font-head);
    font-size: 13px;
    font-weight: 500;
    letter-spacing: .18em;
  }
  .rail__link[aria-current="page"]::after {
    content: "";
    position: absolute;
    left: 0; top: 8px; bottom: 8px;
    width: 2px;
    background: var(--cyan-400);
    box-shadow: 0 0 10px rgba(41, 231, 214, .55);
  }
}

/* 移动端抽屉 */
@media (max-width: 767px) {
  .rail__nav {
    position: fixed;
    top: 0; left: 0; bottom: 0;
    width: 282px;
    max-width: 84vw;
    padding: 18px 14px 28px;
    background: var(--ink-900);
    border-right: 1px solid var(--line-600);
    overflow-y: auto;
    z-index: 20;
    transform: translateX(-102%);
    visibility: hidden;
    transition: transform var(--dur-base) var(--ease), visibility 0s linear var(--dur-base);
  }
  .site-rail[data-open="true"] .rail__nav {
    transform: none;
    visibility: visible;
    transition: transform var(--dur-base) var(--ease), visibility 0s linear 0s;
  }
  .rail__nav::before {
    content: "栏目导航";
    display: block;
    padding: 2px 8px 12px;
    margin-bottom: 10px;
    border-bottom: 1px solid var(--line-600);
    font-family: var(--font-head);
    font-size: 12px;
    letter-spacing: .22em;
    color: var(--text-mid);
  }
  .rail__list { display: flex; flex-direction: column; }
  .rail__item + .rail__item { border-top: 1px solid rgba(34, 48, 74, .55); }
  .rail__link {
    position: relative;
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 12px;
    padding: 13px 10px;
    color: var(--text-mid);
    text-decoration: none;
    transition: color var(--dur-fast) var(--ease), background var(--dur-base) var(--ease);
  }
  .rail__link::before {
    content: attr(data-index);
    font-family: var(--font-num);
    font-size: 11px;
    color: var(--line-600);
    min-width: 22px;
  }
  .rail__label {
    font-family: var(--font-head);
    font-size: 15px;
    font-weight: 500;
    letter-spacing: .08em;
  }
  .rail__link[aria-current="page"]::after {
    content: "";
    position: absolute;
    left: 0; top: 6px; bottom: 6px;
    width: 2px;
    background: var(--cyan-400);
  }
}

/* 导航交互态（横竖屏通用） */
.rail__link:hover { color: var(--text-hi); background: rgba(41, 231, 214, .06); }
.rail__link:hover::before { color: var(--cyan-700); }
.rail__link[aria-current="page"] {
  color: var(--cyan-400);
  background: linear-gradient(90deg, rgba(41, 231, 214, .14), rgba(41, 231, 214, 0) 72%);
}
.rail__link[aria-current="page"]::before { color: var(--cyan-400); }
.rail__link:focus-visible { outline: 2px solid var(--cyan-400); outline-offset: -3px; }

/* 状态区 */
.rail__status { position: relative; }

@media (min-width: 768px) {
  .rail__status {
    width: 100%;
    margin-top: auto;
    padding-top: 16px;
    border-top: 1px solid var(--line-600);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
  }
}
@media (max-width: 767px) {
  .rail__status {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 10px;
    margin-left: auto;
  }
}

.status-dot {
  position: relative;
  width: 34px;
  height: 34px;
  padding: 0;
  border: 1px solid var(--line-600);
  border-radius: 50%;
  background: transparent;
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease);
}
.status-dot:hover { border-color: var(--cyan-700); }
.status-dot__core {
  display: block;
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--up-400);
}
.status-dot[data-refresh-state="live"] .status-dot__core {
  background: var(--cyan-400);
  animation: bf-pulse 2.4s ease-in-out infinite;
}
.status-dot[data-refresh-state="lag"] .status-dot__core { background: var(--down-400); }

@keyframes bf-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(41, 231, 214, .55); transform: scale(1); }
  50% { box-shadow: 0 0 0 2px rgba(41, 231, 214, .35); transform: scale(1.18); }
}

.status-dot__stamp {
  position: absolute;
  z-index: 3;
  white-space: nowrap;
  padding: 5px 10px;
  background: var(--ink-800);
  border: 1px solid var(--line-600);
  color: var(--cyan-400);
  font-family: var(--font-num);
  font-size: 11px;
  line-height: 1.5;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-fast) var(--ease), transform var(--dur-base) var(--ease);
}

@media (min-width: 768px) {
  .status-dot__stamp {
    left: calc(100% + 12px);
    top: 50%;
    transform: translateY(-50%) translateX(-6px);
  }
  .status-dot__stamp[data-open="true"] { opacity: 1; transform: translateY(-50%) translateX(0); }
}
@media (max-width: 767px) {
  .status-dot__stamp {
    right: 0;
    top: calc(100% + 12px);
    transform: translateY(-6px);
  }
  .status-dot__stamp[data-open="true"] { opacity: 1; transform: translateY(0); }
}

/* 轨道 CTA */
.rail__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .16em;
  color: var(--ink-950);
  background: var(--cyan-400);
  transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}

@media (min-width: 768px) {
  .rail__cta {
    writing-mode: vertical-rl;
    padding: 14px 7px;
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  }
}
@media (max-width: 767px) {
  .rail__cta {
    padding: 8px 14px;
    font-size: 12px;
    letter-spacing: .06em;
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  }
}

.rail__cta:hover, .rail__cta:focus-visible { background: var(--amber-500); color: var(--ink-950); }
.rail__cta-short { display: none; }
@media (max-width: 767px) {
  .rail__cta-long { display: none; }
  .rail__cta-short { display: inline; }
}

/* 抽屉按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  border: 1px solid var(--line-600);
  background: var(--ink-800);
  color: var(--text-hi);
  cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.nav-toggle:hover { border-color: var(--cyan-700); color: var(--cyan-400); }
.nav-toggle__bars { display: flex; flex-direction: column; gap: 3px; width: 16px; }
.nav-toggle__bars i {
  display: block;
  height: 1px;
  background: currentColor;
  transition: transform var(--dur-base) var(--ease), opacity var(--dur-fast) var(--ease);
}
.nav-toggle__text {
  font-family: var(--font-head);
  font-size: 12px;
  letter-spacing: .1em;
}
.site-rail[data-open="true"] .nav-toggle__bars i:nth-child(1) { transform: translateY(4px) rotate(45deg); }
.site-rail[data-open="true"] .nav-toggle__bars i:nth-child(2) { opacity: 0; }
.site-rail[data-open="true"] .nav-toggle__bars i:nth-child(3) { transform: translateY(-4px) rotate(-45deg); }

@media (max-width: 767px) {
  .nav-toggle { display: inline-flex; flex: 0 0 auto; }
}

/* 抽屉遮罩 */
.nav-scrim {
  position: fixed;
  top: var(--topbar-h);
  left: 0; right: 0; bottom: 0;
  z-index: 5;
  background: rgba(5, 10, 20, .74);
  border: 0;
}
@media (min-width: 768px) { .nav-scrim { display: none; } }

/* ==========================================================================
   按钮 / 胶囊 / 标签
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border: 1px solid var(--line-600);
  background: var(--ink-800);
  color: var(--text-hi);
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .03em;
  text-decoration: none;
  cursor: pointer;
  transition: background var(--dur-base) var(--ease), border-color var(--dur-base) var(--ease), color var(--dur-base) var(--ease);
}
.btn:hover { border-color: var(--cyan-700); color: var(--cyan-400); }
.btn--primary { background: var(--cyan-400); border-color: var(--cyan-400); color: var(--ink-950); }
.btn--primary:hover { background: var(--cyan-700); border-color: var(--cyan-700); color: var(--ink-950); }
.btn--amber { background: var(--amber-500); border-color: var(--amber-500); color: var(--ink-950); }
.btn--amber:hover { background: #E39A12; border-color: #E39A12; color: var(--ink-950); }
.btn--ghost { background: transparent; border-color: var(--cyan-700); color: var(--cyan-400); }
.btn--ghost:hover { background: rgba(41, 231, 214, .1); color: var(--cyan-400); }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border: 1px solid var(--line-600);
  color: var(--text-mid);
  font-family: var(--font-head);
  font-size: 12px;
  letter-spacing: .06em;
  line-height: 1.7;
  white-space: nowrap;
}
.chip--live { border-color: var(--cyan-700); color: var(--cyan-400); }
.chip--fav { border-color: var(--amber-500); color: var(--amber-500); }
.chip--lag { border-color: var(--down-400); color: var(--down-400); }
.chip--up { border-color: var(--up-400); color: var(--up-400); }

.eyebrow {
  display: inline-block;
  margin: 0 0 12px;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--cyan-400);
}

.lead {
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-hi);
  max-width: 62ch;
}

.meta-line {
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--text-mid);
}

/* ---------- 数字 ---------- */
.num {
  font-family: var(--font-num);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: -.01em;
}
.num--score { font-size: clamp(28px, 4vw, 44px); line-height: 1.05; }
.num--stat { font-size: 20px; line-height: 1.2; }
.num-up { color: var(--up-400); }
.num-down { color: var(--down-400); }
.num-cyan { color: var(--cyan-400); }
.num-amber { color: var(--amber-500); }
.num-violet { color: var(--violet-500); }

/* ---------- 框景（刻度边框） ---------- */
.frame {
  position: relative;
  padding: clamp(20px, 3vw, 32px);
  border: 1px solid var(--line-600);
  background: var(--ink-900);
}
.frame::before {
  content: "";
  position: absolute;
  inset: -10px;
  pointer-events: none;
  opacity: .85;
  background-image:
    repeating-linear-gradient(90deg, var(--line-600) 0 1px, transparent 1px 14px),
    repeating-linear-gradient(90deg, var(--line-600) 0 1px, transparent 1px 14px),
    repeating-linear-gradient(0deg, var(--line-600) 0 1px, transparent 1px 14px),
    repeating-linear-gradient(0deg, var(--line-600) 0 1px, transparent 1px 14px);
  background-size: 100% 7px, 100% 7px, 7px 100%, 7px 100%;
  background-position: 0 0, 0 100%, 0 0, 100% 0;
  background-repeat: no-repeat;
}
.frame--flush::before { inset: -1px; background-size: 100% 5px, 100% 5px, 5px 100%, 5px 100%; }

/* ---------- 切角面板 ---------- */
.panel {
  position: relative;
  padding: 22px 22px 24px;
  background: var(--ink-800);
  clip-path: polygon(16px 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%, 0 16px);
}
.panel--cyan { background: linear-gradient(135deg, rgba(41, 231, 214, .12), rgba(17, 28, 46, .9) 60%); }
.panel--amber { background: linear-gradient(135deg, rgba(255, 176, 32, .12), rgba(17, 28, 46, .9) 60%); }
.panel--cut { clip-path: polygon(20px 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%, 0 20px); }

/* ---------- 斜线分隔 ---------- */
.slash {
  display: block;
  height: 1px;
  border: 0;
  margin: clamp(28px, 4vw, 52px) 0;
  background: repeating-linear-gradient(115deg, var(--line-600) 0 2px, transparent 2px 10px);
}

/* ---------- 正文容器 ---------- */
.prose { max-width: 68ch; }
.prose p { line-height: 1.75; }
.prose h2, .prose h3 { margin-top: 1.6em; }
.prose h2:first-child, .prose h3:first-child { margin-top: 0; }
.prose a { color: var(--cyan-400); text-decoration: underline; text-underline-offset: 3px; }
.prose a:hover { color: var(--cyan-700); }
.prose ul { list-style: none; margin: 0 0 1.2em; padding: 0; }
.prose ul li { position: relative; padding-left: 18px; margin-bottom: .5em; }
.prose ul li::before {
  content: "";
  position: absolute;
  left: 0; top: .72em;
  width: 7px; height: 1px;
  background: var(--cyan-700);
}

/* ---------- 面包屑 ---------- */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 20px;
  font-family: var(--font-head);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--text-mid);
}
.crumbs li { display: flex; align-items: center; gap: 8px; }
.crumbs li + li::before { content: "/"; color: var(--line-600); }
.crumbs a { color: var(--text-mid); text-decoration: none; }
.crumbs a:hover { color: var(--cyan-400); }
.crumbs [aria-current="page"] { color: var(--text-hi); }

/* ---------- 网格 ---------- */
.grid { display: grid; gap: clamp(16px, 2.4vw, 28px); }
.grid--2 { grid-template-columns: 1fr; }
.grid--3 { grid-template-columns: 1fr; }
.grid--auto { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

@media (min-width: 768px) {
  .grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid--5-7 { grid-template-columns: 5fr 7fr; }
  .grid--4-8 { grid-template-columns: 4fr 8fr; }
  .grid--7-5 { grid-template-columns: 7fr 5fr; }
}

/* ---------- 横向滚动断点 ---------- */
.rail-scroll {
  display: flex;
  gap: 14px;
  overflow-x: auto;
  padding-bottom: 14px;
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
  scrollbar-color: var(--cyan-700) var(--ink-800);
}
.rail-scroll > * { scroll-snap-align: start; flex: 0 0 auto; }
.rail-scroll::-webkit-scrollbar { height: 6px; }
.rail-scroll::-webkit-scrollbar-track { background: var(--ink-800); }
.rail-scroll::-webkit-scrollbar-thumb { background: var(--cyan-700); }
.rail-scroll:focus-visible { outline: 2px solid var(--cyan-400); outline-offset: 4px; }

/* ---------- 折叠 ---------- */
.disc {
  border-top: 1px solid var(--line-600);
  padding: 14px 0;
}
.disc summary {
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 500;
  color: var(--text-hi);
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.disc summary::-webkit-details-marker { display: none; }
.disc summary::before {
  content: "+";
  font-family: var(--font-num);
  color: var(--cyan-400);
  font-size: 14px;
}
.disc[open] summary::before { content: "−"; }
.disc summary:hover { color: var(--cyan-400); }
.disc > p, .disc > div { margin-top: 10px; color: var(--text-mid); font-size: 14px; }

/* ---------- 图片容器 ---------- */
.media {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  border: 1px solid var(--line-600);
  background-color: var(--ink-800);
  background-image:
    linear-gradient(135deg, rgba(41, 231, 214, .07), rgba(124, 107, 255, .06) 70%),
    repeating-linear-gradient(135deg, rgba(34, 48, 74, .6) 0 1px, transparent 1px 13px);
}
.media::before {
  content: "";
  display: block;
  padding-top: var(--media-ratio, 56.25%);
}
.media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(5, 10, 20, 0) 45%, rgba(5, 10, 20, .6));
}
.media__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.92) contrast(1.04);
}
.media--wide::before { padding-top: 42%; }
.media--tall::before { padding-top: 125%; }
.media--square::before { padding-top: 100%; }
.media--cut { clip-path: polygon(20px 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%, 0 20px); }

/* ---------- 滚动显现 ---------- */
.has-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
}
.has-reveal [data-reveal].is-in { opacity: 1; transform: none; }

/* ==========================================================================
   页脚
   ========================================================================== */
.site-foot {
  position: relative;
  background: var(--ink-900);
  border-top: 1px solid var(--line-600);
  color: var(--text-mid);
  padding-top: clamp(44px, 6vw, 76px);
}
.site-foot::before {
  content: "";
  position: absolute;
  top: -5px; left: 0; right: 0;
  height: 5px;
  background: repeating-linear-gradient(to right, var(--line-600) 0 1px, transparent 1px 18px);
  opacity: .8;
  pointer-events: none;
}

.foot__inner {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  padding-bottom: clamp(32px, 4vw, 56px);
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .foot__inner { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1024px) {
  .foot__inner { grid-template-columns: 1.3fr 2.2fr 1.5fr; }
}

.foot__brand-cn {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 700;
  color: var(--text-hi);
  letter-spacing: .02em;
}
.foot__brand-sub {
  margin: 0 0 14px;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--cyan-400);
}
.foot__tagline {
  margin: 0 0 18px;
  font-size: 14px;
  color: var(--text-mid);
  max-width: 24ch;
}
.foot__cta { padding: 9px 16px; font-size: 13px; }

.foot__nav {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
@media (min-width: 480px) {
  .foot__nav { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

.foot__col-title {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .14em;
  color: var(--text-hi);
}
.foot__col-title::after {
  content: "";
  display: block;
  width: 24px;
  height: 2px;
  margin-top: 8px;
  background: var(--cyan-700);
}
.foot__list li + li { margin-top: 8px; }
.foot__list a {
  font-size: 14px;
  color: var(--text-mid);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease);
}
.foot__list a:hover { color: var(--cyan-400); }

.foot__contact-line {
  margin: 0 0 8px;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--text-hi);
  overflow-wrap: anywhere;
}
.foot__address {
  margin: 0 0 10px;
  font-size: 14px;
  color: var(--text-mid);
}
.foot__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-mid);
  max-width: 40ch;
}

.foot__base {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  align-items: center;
  justify-content: space-between;
  padding-top: 18px;
  padding-bottom: 22px;
  border-top: 1px solid var(--line-600);
}
.foot__legal {
  margin: 0;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--text-mid);
}
.foot__legal--dim { color: var(--line-600); }

/* ==========================================================================
   无障碍与降级
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .has-reveal [data-reveal] { opacity: 1; transform: none; }
  .rail-scroll { scroll-snap-type: none; }
}