/* ============================================================
   博万体育官网 · 共享样式表 /assets/site.css
   夜墨绿基底 · 荧光黄强调 · 左侧框架轨道 · 斜向切割
   ============================================================ */

/* ---------- 1. 重置 ---------- */
*,
*::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, hr {
  margin: 0;
}

ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

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

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

input, select, textarea { font: inherit; }

hr { border: 0; }

/* ---------- 2. 设计令牌 ---------- */
:root {
  --ink-900: #062A22;
  --ink-700: #0C3F33;
  --turf-500: #157A5A;
  --volt: #E8FF3A;
  --caution: #F5C518;
  --eject: #E23A3A;
  --wine: #7A1F3D;
  --indigo: #2A2B6B;
  --paper: #F4F6F1;
  --ink-text: #0B1F1A;
  --mist: #9FB8AC;

  --rail-w: clamp(104px, 8.6vw, 132px);
  --topbar-h: 58px;
  --shell-max: 1280px;
  --gutter: clamp(20px, 4vw, 64px);

  --font-body: "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC",
    "Noto Sans SC", "Microsoft YaHei", system-ui, -apple-system,
    "Segoe UI", sans-serif;
  --font-narrow: "Oswald", "Barlow Condensed", "Arial Narrow",
    "Helvetica Neue", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: ui-monospace, "JetBrains Mono", "IBM Plex Mono",
    "SFMono-Regular", Consolas, "Liberation Mono", monospace;

  --radius-card: 20px 20px 20px 6px;
  --line-soft: rgba(159, 184, 172, 0.18);
  --line-volt: rgba(232, 255, 58, 0.42);
}

/* ---------- 3. 基础排版 ---------- */
body {
  background: var(--ink-900);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 450;
  line-height: 1.85;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-narrow);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.012em;
}

strong, b { font-weight: 800; }

::selection {
  background: var(--volt);
  color: var(--ink-900);
}

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

/* ---------- 4. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 0;
  left: calc(var(--rail-w) + 14px);
  z-index: 300;
  transform: translateY(-140%);
  padding: 12px 20px;
  background: var(--volt);
  color: var(--ink-900);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.04em;
  border-radius: 0 0 12px 12px;
  transition: transform 0.2s ease;
}

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

/* ---------- 5. 头部：左侧框架轨道 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--rail-w);
  z-index: 120;
  background: var(--ink-900);
  background-image:
    radial-gradient(120% 42% at 50% 0%, rgba(232, 255, 58, 0.09), transparent 70%),
    linear-gradient(180deg, #073126 0%, #062A22 42%, #04211B 100%);
}

.site-header::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg,
    rgba(232, 255, 58, 0) 0%,
    var(--line-volt) 14%,
    var(--line-volt) 86%,
    rgba(232, 255, 58, 0) 100%);
}

.rail {
  position: relative;
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 20px 0 18px;
  overflow: hidden;
}

.rail__top {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  padding: 0 10px 16px;
  border-bottom: 1px solid rgba(232, 255, 58, 0.14);
}

.rail__brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-align: center;
}

.rail__mark {
  position: relative;
  width: 38px;
  height: 38px;
  border-radius: 12px 12px 12px 3px;
  background: linear-gradient(150deg, var(--volt) 0%, var(--turf-500) 58%, var(--ink-700) 100%);
  box-shadow: 0 0 0 1px rgba(232, 255, 58, 0.42),
    0 10px 22px -12px rgba(232, 255, 58, 0.8);
}

.rail__mark::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 13px;
  height: 13px;
  background: var(--ink-900);
  border-radius: 13px 0 0 0;
}

.rail__brand-name {
  font-family: var(--font-narrow);
  font-size: 15px;
  font-weight: 900;
  letter-spacing: 0.06em;
  color: var(--paper);
  line-height: 1.2;
}

.rail__brand-sub {
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 1.3;
  letter-spacing: 0.12em;
  color: var(--mist);
  word-break: break-all;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  min-height: 40px;
  padding: 8px 15px;
  border-radius: 999px;
  border: 1px solid var(--line-volt);
  color: var(--volt);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.06em;
}

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: background 0.2s ease;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.24s ease, top 0.24s ease;
}

.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after { top: 6px; }

.site-header[data-open] .nav-toggle__bars { background: transparent; }
.site-header[data-open] .nav-toggle__bars::before { top: 0; transform: rotate(45deg); }
.site-header[data-open] .nav-toggle__bars::after { top: 0; transform: rotate(-45deg); }

.rail__nav {
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 16px 10px 0;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.rail__quick {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 9px 6px;
  border-radius: 999px;
  background: var(--volt);
  color: var(--ink-900);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.06em;
  line-height: 1.2;
  text-align: center;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.rail__quick::before {
  content: "";
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ink-900);
  animation: bowan-pulse 2.4s ease-in-out infinite;
}

.rail__quick:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 26px -14px rgba(232, 255, 58, 0.95);
}

@keyframes bowan-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.32; transform: scale(0.62); }
}

.rail__list {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.rail__link {
  position: relative;
  display: block;
  padding: 9px 8px 9px 12px;
  border-radius: 0 10px 10px 0;
  color: var(--mist);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: 0.01em;
  transition: color 0.18s ease, background 0.18s ease, transform 0.18s ease;
}

.rail__link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 3px;
  height: 0;
  border-radius: 3px;
  background: var(--volt);
  transform: translateY(-50%);
  transition: height 0.22s ease;
}

.rail__link:hover {
  color: var(--paper);
  background: rgba(232, 255, 58, 0.07);
  transform: translateX(2px);
}

.rail__link[aria-current="page"] {
  color: var(--volt);
  font-weight: 800;
  background: rgba(232, 255, 58, 0.06);
}

.rail__link[aria-current="page"]::before {
  height: 64%;
  box-shadow: 0 0 14px rgba(232, 255, 58, 0.8);
}

.rail__cta {
  display: block;
  margin: 2px 4px 0;
  padding: 11px 8px;
  border-radius: 12px;
  border: 1px solid var(--line-volt);
  color: var(--volt);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.05em;
  line-height: 1.35;
  text-align: center;
  transition: background 0.18s ease, color 0.18s ease, transform 0.18s ease;
}

.rail__cta:hover {
  background: var(--volt);
  color: var(--ink-900);
  transform: translateY(-2px);
}

.rail__head {
  position: absolute;
  right: -3px;
  top: 0;
  width: 7px;
  height: 26px;
  border-radius: 4px;
  background: var(--volt);
  box-shadow: 0 0 16px rgba(232, 255, 58, 0.8);
  pointer-events: none;
  will-change: transform;
}

/* ---------- 6. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 9vw, 118px);
  padding: clamp(46px, 6vw, 84px) var(--gutter) 30px;
  background: var(--ink-900);
  background-image:
    radial-gradient(90% 60% at 8% 0%, rgba(21, 122, 90, 0.28), transparent 68%),
    radial-gradient(70% 50% at 96% 10%, rgba(122, 31, 61, 0.22), transparent 70%);
  border-top: 1px solid var(--line-volt);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg,
    var(--volt) 0%, var(--turf-500) 42%, var(--wine) 72%, var(--indigo) 100%);
  transform-origin: left bottom;
  transform: skewY(-0.6deg);
}

.footer-grid {
  width: 100%;
  max-width: var(--shell-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(280px, 1fr) minmax(0, 1.9fr);
  gap: clamp(32px, 5vw, 76px);
}

.footer-slogan {
  font-family: var(--font-narrow);
  font-size: clamp(24px, 2.7vw, 34px);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--paper);
  max-width: 12em;
}

.footer-kicker {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--volt);
}

.footer-contact {
  margin-top: 26px;
  display: grid;
  gap: 14px;
}

.footer-contact__item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 12px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line-soft);
}

.footer-contact__label {
  flex: 0 0 100%;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.footer-contact__value {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--paper);
  word-break: break-word;
}

.footer-contact__value--mono {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.01em;
}

.copy-btn {
  flex: 0 0 auto;
  align-self: center;
  min-height: 30px;
  padding: 4px 13px;
  border-radius: 999px;
  border: 1px solid var(--line-volt);
  color: var(--volt);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  line-height: 1.2;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.copy-btn:hover,
.copy-btn[data-copied="1"] {
  background: var(--volt);
  color: var(--ink-900);
  border-color: var(--volt);
}

.footer-note {
  margin-top: 16px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--mist);
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 38px);
}

.footer-col__title {
  position: relative;
  padding-left: 14px;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--paper);
}

.footer-col__title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--volt);
  transform: translateY(-50%);
}

.footer-col ul {
  margin-top: 16px;
  display: grid;
  gap: 9px;
}

.footer-col a {
  display: inline-block;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--mist);
  transition: color 0.18s ease, transform 0.18s ease;
}

.footer-col a:hover {
  color: var(--volt);
  transform: translateX(3px);
}

.footer-legal {
  width: 100%;
  max-width: var(--shell-max);
  margin: clamp(40px, 5vw, 64px) auto 0;
  padding-top: 22px;
  border-top: 1px solid var(--line-soft);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 28px;
  font-size: 13px;
  color: var(--mist);
}

.footer-legal__links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 22px;
}

.footer-legal__links a {
  color: var(--mist);
  transition: color 0.18s ease;
}

.footer-legal__links a:hover { color: var(--volt); }

.footer-legal__icp {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

/* ---------- 7. 通用布局组件 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  padding-block: clamp(46px, 7vw, 96px);
}

.section--tight {
  padding-block: clamp(26px, 4vw, 52px);
}

.section--flush-top { padding-top: 0; }

.grid {
  display: grid;
  gap: clamp(18px, 2.6vw, 34px);
}

.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--split { grid-template-columns: minmax(0, 3fr) minmax(0, 2fr); }
.grid--split-rev { grid-template-columns: minmax(0, 2fr) minmax(0, 3fr); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--volt);
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--volt);
}

.display {
  font-family: var(--font-narrow);
  font-size: clamp(32px, 5.4vw, 68px);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: -0.022em;
  color: var(--paper);
}

.section-title {
  font-family: var(--font-narrow);
  font-size: clamp(25px, 3.4vw, 40px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.014em;
}

.lead {
  max-width: 34em;
  font-size: clamp(16.5px, 1.5vw, 19px);
  line-height: 1.85;
  color: rgba(244, 246, 241, 0.82);
}

.prose {
  max-width: 34em;
  font-size: 17px;
  line-height: 1.85;
  color: rgba(244, 246, 241, 0.86);
}

.prose p + p { margin-top: 1.05em; }
.prose h2 { margin-top: 1.9em; font-size: clamp(23px, 2.6vw, 30px); }
.prose h3 { margin-top: 1.6em; font-size: clamp(19px, 2vw, 23px); }
.prose ul { list-style: disc; padding-left: 1.35em; margin-top: 1em; }
.prose ol { list-style: decimal; padding-left: 1.45em; margin-top: 1em; }
.prose li { margin: 0.4em 0; }
.prose a { color: var(--volt); text-decoration: underline; text-underline-offset: 3px; }
.prose strong { color: var(--paper); }

.slice {
  height: clamp(46px, 7vw, 92px);
  background: linear-gradient(96deg,
    var(--wine) 0%, var(--ink-700) 40%, var(--turf-500) 100%);
  clip-path: polygon(0 0, 100% 24%, 100% 100%, 0 76%);
}

/* ---------- 8. 资料卡 / 档案夹 / 标签 ---------- */
.card {
  position: relative;
  padding: clamp(20px, 3vw, 30px);
  border-radius: var(--radius-card);
  border: 1px solid var(--line-soft);
  background: var(--ink-700);
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--line-volt);
}

.card__meta {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.card__title {
  margin-top: 10px;
  font-family: var(--font-narrow);
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 900;
  line-height: 1.26;
}

.card__text {
  margin-top: 10px;
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(244, 246, 241, 0.76);
}

.dossier {
  position: relative;
  padding: clamp(28px, 3.4vw, 40px) clamp(20px, 3vw, 32px) clamp(24px, 3vw, 34px);
  border: 1px solid var(--line-soft);
  border-radius: 6px 22px 22px 22px;
  background: linear-gradient(158deg, rgba(12, 63, 51, 0.96) 0%, rgba(6, 42, 34, 0.96) 72%);
}

.dossier__tab {
  position: absolute;
  top: -1px;
  left: -1px;
  padding: 7px 16px;
  border-radius: 6px 0 14px 0;
  background: var(--volt);
  color: var(--ink-900);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  line-height: 1.3;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  border-radius: 6px;
  border: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.5;
  color: var(--mist);
}

.tag--volt { color: var(--volt); border-color: var(--line-volt); }
.tag--yellow { color: var(--caution); border-color: rgba(245, 197, 24, 0.5); }
.tag--red { color: var(--eject); border-color: rgba(226, 58, 58, 0.55); }
.tag--wine { background: var(--wine); color: var(--paper); border-color: transparent; }
.tag--indigo { background: var(--indigo); color: var(--paper); border-color: transparent; }

/* ---------- 9. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 13px 24px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.04em;
  line-height: 1.3;
  text-align: center;
  transition: transform 0.18s ease, background 0.18s ease,
    color 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.btn--volt {
  background: var(--volt);
  color: var(--ink-900);
}

.btn--volt:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 30px -16px rgba(232, 255, 58, 0.95);
}

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

.btn--line:hover {
  background: var(--volt);
  color: var(--ink-900);
  transform: translateY(-2px);
}

.btn--ghost {
  border-color: rgba(159, 184, 172, 0.36);
  color: var(--paper);
}

.btn--ghost:hover {
  border-color: var(--paper);
  transform: translateY(-2px);
}

/* ---------- 10. 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

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

.breadcrumb li::after {
  content: "/";
  color: rgba(159, 184, 172, 0.45);
}

.breadcrumb li:last-child::after { content: none; }

.breadcrumb a {
  color: var(--mist);
  transition: color 0.18s ease;
}

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

.breadcrumb [aria-current="page"] { color: var(--paper); }

/* ---------- 11. 媒体容器（供页面阶段放置图片占位） ---------- */
.media {
  position: relative;
  overflow: hidden;
  border-radius: 18px 18px 18px 5px;
  background: linear-gradient(145deg, var(--ink-700) 0%, var(--ink-900) 100%);
  aspect-ratio: 16 / 9;
  isolation: isolate;
}

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

.media > img,
.media > svg,
.media > picture > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    linear-gradient(158deg, rgba(122, 31, 61, 0.26) 0%, rgba(122, 31, 61, 0) 56%),
    linear-gradient(0deg, rgba(6, 42, 34, 0.6) 0%, rgba(6, 42, 34, 0) 58%);
}

.media__tag {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 2;
  padding: 5px 11px;
  border-radius: 999px;
  background: rgba(6, 42, 34, 0.84);
  color: var(--volt);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.5;
}

/* ---------- 12. 滚动显现 ---------- */
.has-js [data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.55s ease, transform 0.72s cubic-bezier(0.2, 0.7, 0.3, 1);
}

.has-js [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* ---------- 13. 表面色变体 ---------- */
.surface-paper {
  background: var(--paper);
  color: var(--ink-text);
}

.surface-paper .prose,
.surface-paper .lead { color: rgba(11, 31, 26, 0.84); }

.surface-turf {
  background: var(--ink-700);
}

.surface-wine {
  background: var(--wine);
}

.surface-indigo {
  background: var(--indigo);
}

/* ---------- 14. 响应式：平板与手机 ---------- */
@media (max-width: 1080px) {
  .footer-grid {
    grid-template-columns: minmax(0, 1fr);
  }
  .footer-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px 24px;
  }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 980px) {
  .grid--2,
  .grid--3,
  .grid--split,
  .grid--split-rev {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 861px) {
  :root {
    --rail-w: 0px;
    --topbar-h: 58px;
  }

  body {
    padding-top: var(--topbar-h);
  }

  body.is-nav-open {
    overflow: hidden;
  }

  .skip-link {
    left: 14px;
  }

  .site-header {
    top: 0;
    right: 0;
    left: 0;
    bottom: auto;
    width: auto;
    height: var(--topbar-h);
  }

  .site-header::after {
    top: auto;
    bottom: 0;
    left: 0;
    right: 0;
    width: auto;
    height: 1px;
    background: linear-gradient(90deg,
      rgba(232, 255, 58, 0) 0%,
      var(--line-volt) 22%,
      var(--line-volt) 78%,
      rgba(232, 255, 58, 0) 100%);
  }

  .rail {
    flex-direction: row;
    align-items: center;
    height: 100%;
    padding: 0 14px;
    overflow: visible;
  }

  .rail__top {
    flex: 1 1 auto;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 0;
    border-bottom: 0;
  }

  .rail__brand {
    flex-direction: row;
    align-items: center;
    gap: 10px;
    text-align: left;
  }

  .rail__mark {
    width: 28px;
    height: 28px;
    border-radius: 9px 9px 9px 3px;
  }

  .rail__mark::after {
    width: 10px;
    height: 10px;
    border-radius: 10px 0 0 0;
  }

  .rail__brand-name {
    font-size: 15px;
  }

  .rail__brand-sub {
    display: none;
  }

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

  .rail__nav {
    position: fixed;
    inset: var(--topbar-h) 0 0 0;
    z-index: 110;
    display: flex;
    flex-direction: column;
    gap: 18px;
    margin: 0;
    padding: 26px 20px 40px;
    background: var(--ink-900);
    background-image: linear-gradient(180deg, #073126 0%, #062A22 46%, #04211B 100%);
    border-top: 1px solid var(--line-volt);
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-10px);
    transition: opacity 0.22s ease, transform 0.3s ease, visibility 0.22s;
  }

  .site-header[data-open] .rail__nav {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: none;
  }

  .rail__quick {
    padding: 12px 14px;
    font-size: 13px;
  }

  .rail__list {
    gap: 2px;
  }

  .rail__link {
    padding: 14px 16px;
    border-radius: 0 12px 12px 0;
    font-size: 18px;
  }

  .rail__link::before {
    width: 4px;
  }

  .rail__cta {
    margin: 6px 0 0;
    padding: 15px 14px;
    font-size: 15px;
  }

  .rail__head {
    display: none;
  }

  .footer-legal {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .footer-legal__icp {
    margin-left: 0;
  }

  .display {
    font-size: clamp(30px, 8.6vw, 40px);
  }
}

@media (max-width: 560px) {
  body {
    font-size: 16px;
  }

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

  .footer-contact__value--mono {
    font-size: 13px;
  }

  .btn {
    width: 100%;
  }
}

/* ---------- 15. 无障碍与动效偏好 ---------- */
@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;
  }

  .has-js [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .rail__head {
    display: none;
  }

  .rail__quick::before {
    animation: none;
  }
}