/* ============================================================
   B体育赛场 · 共享 Site Kit
   /assets/site.css
   高原暮色深蓝 + 荧光青绿 + 炽热橙红 + 奶油纸色
   ============================================================ */

:root {
  --bsm-night: #0B1B33;
  --bsm-night-2: #102A4C;
  --bsm-line: #2E4A6B;
  --bsm-cream: #F4EBDD;
  --bsm-paper: #FBF7EF;
  --bsm-ink: #241B16;
  --bsm-teal: #35F0C0;
  --bsm-flame: #FF5A36;
  --bsm-ember: #FFB07A;
  --bsm-steel: #7F93AD;

  --bsm-font-serif: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "SimSun", serif;
  --bsm-font-sans: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --bsm-font-num: "Barlow Condensed", "Roboto Condensed", "DIN Condensed", "Arial Narrow", sans-serif;
  --bsm-font-accent: "Oswald", "Barlow Condensed", "Arial Narrow", sans-serif;

  --bsm-header-h: 78px;
  --bsm-gutter: clamp(16px, 4vw, 56px);
  --bsm-cut: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
  --bsm-cut-sm: polygon(0 0, 100% 0, 100% 100%, 9px 100%, 0 calc(100% - 9px));
}

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

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

html.bsm-lock { overflow: hidden; }

body {
  margin: 0;
  background: var(--bsm-cream);
  color: var(--bsm-ink);
  font-family: var(--bsm-font-sans);
  font-size: 17px;
  line-height: 1.78;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, p, figure, blockquote, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
img, picture, video, svg { display: block; max-width: 100%; height: auto; }

:focus-visible {
  outline: 2px solid var(--bsm-flame);
  outline-offset: 3px;
}

/* ---------- 布局基础 ---------- */
.bsm-container {
  width: 100%;
  max-width: 1240px;
  margin-inline: auto;
  padding-inline: var(--bsm-gutter);
}

.bsm-main { display: block; padding-top: var(--bsm-header-h); }
.bsm-main--overlay { padding-top: 0; }

.bsm-section { padding-block: clamp(40px, 7vw, 88px); }
.bsm-section--paper { background: var(--bsm-paper); }
.bsm-section--night {
  background: var(--bsm-night);
  color: rgba(251, 247, 239, 0.82);
}

.bsm-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--bsm-font-accent);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--bsm-flame);
}
.bsm-eyebrow::before {
  content: "";
  width: 26px;
  height: 2px;
  background: currentColor;
  transform: skewX(-20deg);
}
.bsm-section--night .bsm-eyebrow { color: var(--bsm-teal); }

.bsm-rule {
  border: 0;
  height: 1px;
  margin-block: clamp(24px, 4vw, 40px);
  background: linear-gradient(90deg, var(--bsm-line), rgba(46, 74, 107, 0.12));
}

.bsm-grid { display: grid; gap: clamp(16px, 2.4vw, 32px); }
.bsm-grid--2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); }
.bsm-grid--3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr)); }
.bsm-grid--4 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr)); }

.bsm-panel {
  position: relative;
  background: var(--bsm-paper);
  border: 1px solid rgba(36, 27, 22, 0.12);
  padding: clamp(20px, 3vw, 32px);
  clip-path: var(--bsm-cut);
}
.bsm-panel--night {
  background: var(--bsm-night-2);
  border-color: rgba(53, 240, 192, 0.25);
  color: rgba(251, 247, 239, 0.85);
}

/* ---------- 按钮 ---------- */
.bsm-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  font-family: var(--bsm-font-sans);
  font-size: 14.5px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0.04em;
  border: 1px solid transparent;
  clip-path: polygon(0 0, 100% 0, 100% 58%, calc(100% - 14px) 100%, 0 100%);
  transition: transform 0.18s ease, background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}
.bsm-btn--primary {
  background: var(--bsm-flame);
  color: var(--bsm-night);
}
.bsm-btn--primary:hover {
  background: var(--bsm-ember);
  transform: translateY(-2px);
}
.bsm-btn--ghost {
  background: transparent;
  color: var(--bsm-teal);
  border-color: rgba(53, 240, 192, 0.55);
}
.bsm-btn--ghost:hover {
  background: rgba(53, 240, 192, 0.14);
  color: var(--bsm-paper);
  border-color: var(--bsm-teal);
  transform: translateY(-2px);
}
.bsm-btn-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

/* ---------- 跳过链接 ---------- */
.bsm-skip {
  position: fixed;
  left: 50%;
  top: 8px;
  z-index: 300;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--bsm-night);
  background: var(--bsm-teal);
  clip-path: var(--bsm-cut);
  transform: translate(-50%, -180%);
  transition: transform 0.18s ease;
}
.bsm-skip:focus { transform: translate(-50%, 0); }

/* ============================================================
   头部
   ============================================================ */
.bsm-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 90;
  color: var(--bsm-paper);
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
.bsm-header::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(11, 27, 51, 0.86), rgba(11, 27, 51, 0));
  transition: opacity 0.25s ease;
}
.bsm-header[data-solid="true"] {
  background: var(--bsm-night);
  border-bottom-color: rgba(53, 240, 192, 0.3);
  box-shadow: 0 14px 34px -26px rgba(0, 0, 0, 0.95);
}
.bsm-header[data-solid="true"]::before { opacity: 0; }

.bsm-header__grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s ease;
  background-image: linear-gradient(90deg, rgba(46, 74, 107, 0.5) 1px, transparent 1px);
  background-size: calc(100% / 6) 100%;
}
.bsm-header[data-solid="true"] .bsm-header__grid { opacity: 1; }

.bsm-header__inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: clamp(10px, 2vw, 28px);
  min-height: var(--bsm-header-h);
}

/* 品牌 */
.bsm-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  padding-block: 6px;
}
.bsm-brand__mark {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  flex: 0 0 auto;
  font-family: var(--bsm-font-num);
  font-size: 27px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--bsm-night);
  background: var(--bsm-teal);
  clip-path: polygon(0 0, 100% 0, 100% 72%, 72% 100%, 0 100%);
  transition: transform 0.2s ease;
}
.bsm-brand:hover .bsm-brand__mark { transform: translateY(-2px) skewX(-6deg); }
.bsm-brand__text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  line-height: 1.1;
}
.bsm-brand__lockup {
  font-family: var(--bsm-font-serif);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 0.08em;
}
.bsm-brand__sub {
  font-family: var(--bsm-font-accent);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--bsm-teal);
}

/* 导航（桌面横排） */
.bsm-nav {
  display: flex;
  align-items: center;
  margin-inline: auto;
  min-width: 0;
}
.bsm-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}
.bsm-nav__item { position: relative; }
.bsm-nav__link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding: 10px 11px;
  font-size: 14.5px;
  letter-spacing: 0.02em;
  color: rgba(251, 247, 239, 0.8);
  clip-path: var(--bsm-cut-sm);
  transition: color 0.2s ease, background-color 0.2s ease;
}
.bsm-nav__link:hover {
  color: var(--bsm-paper);
  background: rgba(53, 240, 192, 0.1);
}
.bsm-nav__index {
  font-family: var(--bsm-font-num);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--bsm-steel);
}
.bsm-nav__label { white-space: nowrap; }
.bsm-nav__link[aria-current="page"] {
  color: var(--bsm-paper);
  background: rgba(16, 42, 76, 0.92);
}
.bsm-nav__link[aria-current="page"] .bsm-nav__index { color: var(--bsm-teal); }
.bsm-nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 11px;
  right: 11px;
  bottom: 5px;
  height: 2px;
  background: var(--bsm-teal);
  transform: skewX(-14deg);
}
.bsm-nav__head,
.bsm-nav__foot { display: none; }

/* 行动区 */
.bsm-header__actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  margin-left: auto;
}
.bsm-header__cta { white-space: nowrap; }

.bsm-navtoggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 10px 14px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--bsm-teal);
  background: rgba(16, 42, 76, 0.88);
  border: 1px solid rgba(53, 240, 192, 0.45);
  clip-path: var(--bsm-cut-sm);
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}
.bsm-navtoggle__bars {
  display: grid;
  gap: 4px;
  width: 18px;
}
.bsm-navtoggle__bars > span {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform 0.2s ease, width 0.2s ease;
}
.bsm-navtoggle__bars > span:last-child { width: 70%; }
.bsm-navtoggle__label { white-space: nowrap; }

.bsm-header[data-open="true"] .bsm-navtoggle {
  background: var(--bsm-teal);
  color: var(--bsm-night);
  border-color: var(--bsm-teal);
}
.bsm-header[data-open="true"] .bsm-navtoggle__bars > span:first-child {
  transform: translateY(3px) rotate(45deg);
}
.bsm-header[data-open="true"] .bsm-navtoggle__bars > span:last-child {
  width: 100%;
  transform: translateY(-3px) rotate(-45deg);
}

/* 阅读进度 */
.bsm-header__meter {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: rgba(46, 74, 107, 0.55);
  opacity: 0;
  transition: opacity 0.25s ease;
}
.bsm-header[data-solid="true"] .bsm-header__meter { opacity: 1; }
.bsm-progress {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--bsm-teal), var(--bsm-flame));
}

/* 遮罩 */
.bsm-scrim {
  position: fixed;
  inset: 0;
  z-index: 86;
  background: rgba(11, 27, 51, 0.7);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}
.bsm-header[data-open="true"] .bsm-scrim {
  opacity: 1;
  pointer-events: auto;
}

/* ============================================================
   页脚
   ============================================================ */
.bsm-footer {
  position: relative;
  overflow: hidden;
  padding-block: clamp(44px, 7vw, 86px) clamp(22px, 3.5vw, 36px);
  background: var(--bsm-night);
  color: rgba(251, 247, 239, 0.76);
  border-top: 1px solid rgba(53, 240, 192, 0.3);
}
.bsm-footer__grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(90deg, rgba(46, 74, 107, 0.4) 1px, transparent 1px),
    linear-gradient(180deg, rgba(46, 74, 107, 0.24) 1px, transparent 1px);
  background-size: calc(100% / 12) 100%, 100% 96px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), rgba(0, 0, 0, 0.12) 80%, transparent);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), rgba(0, 0, 0, 0.12) 80%, transparent);
}
.bsm-footer__trace {
  position: absolute;
  left: -6%;
  right: -6%;
  top: 0;
  height: 2px;
  transform: rotate(-1.6deg);
  transform-origin: left center;
  background: linear-gradient(90deg, transparent, rgba(53, 240, 192, 0.75) 32%, rgba(255, 90, 54, 0.6) 74%, transparent);
}
.bsm-footer__inner { position: relative; }

.bsm-footer__top {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1.35fr);
  gap: clamp(28px, 4vw, 64px);
  padding-bottom: clamp(26px, 4vw, 44px);
}
.bsm-footer__brand { min-width: 0; }
.bsm-brand--footer { margin-bottom: 16px; color: var(--bsm-paper); }
.bsm-brand--footer .bsm-brand__lockup { font-size: 20px; }

.bsm-footer__intro {
  max-width: 34ch;
  font-family: var(--bsm-font-serif);
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.62;
  color: var(--bsm-paper);
}

.bsm-footer__download {
  margin-top: 22px;
  max-width: 420px;
  padding: 18px 20px;
  background: linear-gradient(150deg, rgba(16, 42, 76, 0.96), rgba(11, 27, 51, 0.72));
  border: 1px solid rgba(53, 240, 192, 0.28);
  clip-path: var(--bsm-cut);
}
.bsm-footer__download-tag {
  display: inline-block;
  font-family: var(--bsm-font-accent);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--bsm-flame);
}
.bsm-footer__download-note {
  margin-top: 8px;
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(251, 247, 239, 0.72);
}
.bsm-footer__download-link {
  margin-top: 14px;
  padding: 9px 16px;
  font-size: 13px;
}

.bsm-footer__cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(18px, 3vw, 36px);
}
.bsm-footer__col { min-width: 0; }
.bsm-footer__coltitle {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding-bottom: 12px;
  margin-bottom: 12px;
  font-family: var(--bsm-font-serif);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--bsm-paper);
  border-bottom: 1px solid rgba(46, 74, 107, 0.8);
}
.bsm-footer__coltitle::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 34px;
  height: 2px;
  background: var(--bsm-teal);
  transform: skewX(-20deg);
}
.bsm-footer__colindex {
  font-family: var(--bsm-font-num);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--bsm-teal);
}
.bsm-footer__links { display: grid; gap: 2px; }
.bsm-footer__link {
  display: inline-block;
  padding: 6px 0;
  font-size: 14px;
  color: rgba(251, 247, 239, 0.74);
  transition: color 0.18s ease, transform 0.18s ease;
}
.bsm-footer__link:hover {
  color: var(--bsm-teal);
  transform: translateX(4px);
}

.bsm-footer__contact {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
  gap: 14px 28px;
  padding-block: clamp(20px, 3vw, 30px);
  border-top: 1px solid rgba(46, 74, 107, 0.85);
  border-bottom: 1px solid rgba(46, 74, 107, 0.85);
}
.bsm-footer__contact-row {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}
.bsm-footer__contact-label {
  font-family: var(--bsm-font-accent);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--bsm-steel);
}
.bsm-footer__contact-value {
  font-size: 14.5px;
  color: var(--bsm-paper);
  word-break: break-word;
}
.bsm-footer__contact-note {
  grid-column: 1 / -1;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(251, 247, 239, 0.55);
}

.bsm-footer__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 22px;
  padding-top: clamp(18px, 3vw, 26px);
  font-size: 13px;
  color: rgba(251, 247, 239, 0.6);
}
.bsm-footer__copy {
  font-family: var(--bsm-font-num);
  font-size: 14px;
  letter-spacing: 0.06em;
}
.bsm-footer__legal {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}
.bsm-footer__legal-link {
  color: rgba(251, 247, 239, 0.72);
  text-decoration: underline;
  text-decoration-color: rgba(53, 240, 192, 0.55);
  text-underline-offset: 4px;
}
.bsm-footer__legal-link:hover { color: var(--bsm-teal); }
.bsm-footer__icp {
  margin-left: auto;
  font-family: var(--bsm-font-num);
  letter-spacing: 0.06em;
  color: rgba(251, 247, 239, 0.5);
}

/* ============================================================
   共用内容组件
   ============================================================ */
.bsm-breadcrumb {
  padding-block: 16px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--bsm-steel);
}
.bsm-breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}
.bsm-breadcrumb__link {
  color: var(--bsm-night-2);
  text-decoration: underline;
  text-decoration-color: rgba(53, 240, 192, 0.75);
  text-underline-offset: 4px;
  transition: color 0.18s ease;
}
.bsm-breadcrumb__link:hover { color: var(--bsm-flame); }
.bsm-breadcrumb__sep { color: var(--bsm-line); }
.bsm-breadcrumb__current { color: var(--bsm-ink); font-weight: 600; }

.bsm-prose {
  max-width: 72ch;
  font-size: 17px;
  line-height: 1.86;
  color: var(--bsm-ink);
}
.bsm-prose > * + * { margin-top: 1.1em; }
.bsm-prose h2 {
  margin-top: 2em;
  padding-left: 14px;
  font-family: var(--bsm-font-serif);
  font-size: clamp(23px, 2.6vw, 30px);
  font-weight: 600;
  line-height: 1.36;
  border-left: 3px solid var(--bsm-flame);
}
.bsm-prose h3 {
  margin-top: 1.6em;
  font-family: var(--bsm-font-serif);
  font-size: clamp(19px, 2vw, 22px);
  font-weight: 600;
  line-height: 1.45;
}
.bsm-prose ul { display: grid; gap: 0.5em; }
.bsm-prose ul li { position: relative; padding-left: 20px; }
.bsm-prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.76em;
  width: 9px;
  height: 2px;
  background: var(--bsm-teal);
}
.bsm-prose a {
  color: var(--bsm-night-2);
  text-decoration: underline;
  text-decoration-color: var(--bsm-teal);
  text-underline-offset: 4px;
}
.bsm-prose a:hover { color: var(--bsm-flame); }

.bsm-media {
  position: relative;
  overflow: hidden;
  background: var(--bsm-night-2);
  clip-path: var(--bsm-cut);
  isolation: isolate;
}
.bsm-media > img,
.bsm-media > picture > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.bsm-media--wide { aspect-ratio: 16 / 9; }
.bsm-media--landscape { aspect-ratio: 4 / 3; }
.bsm-media--square { aspect-ratio: 1 / 1; }
.bsm-media--portrait { aspect-ratio: 3 / 4; }
.bsm-media::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--bsm-teal), transparent 72%);
}
.bsm-media--empty {
  display: grid;
  place-items: center;
  color: rgba(251, 247, 239, 0.5);
  font-family: var(--bsm-font-num);
  font-size: 13px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  background:
    repeating-linear-gradient(135deg, rgba(16, 42, 76, 0.95) 0 14px, rgba(11, 27, 51, 0.95) 14px 28px);
}

.bsm-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--bsm-night);
  background: var(--bsm-teal);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 8px 100%, 0 calc(100% - 8px));
}
.bsm-tag--flame { background: var(--bsm-flame); }
.bsm-tag--outline {
  background: transparent;
  color: var(--bsm-teal);
  border: 1px solid rgba(53, 240, 192, 0.5);
}

.bsm-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.bsm-stat__value {
  font-family: var(--bsm-font-num);
  font-size: clamp(38px, 7vw, 64px);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: 0.01em;
  font-variant-numeric: tabular-nums;
  color: var(--bsm-flame);
}
.bsm-stat__label {
  font-size: 12.5px;
  letter-spacing: 0.16em;
  color: var(--bsm-steel);
}

/* 显现 */
.bsm-reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.22, 0.68, 0.18, 1);
}
.bsm-reveal.is-in {
  opacity: 1;
  transform: none;
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1080px) and (min-width: 901px) {
  .bsm-nav__link { padding-inline: 8px; font-size: 13px; gap: 5px; }
  .bsm-nav__index { font-size: 10px; }
  .bsm-header__cta { padding: 10px 14px; font-size: 13px; }
  .bsm-brand__sub { display: none; }
}

@media (max-width: 900px) {
  :root { --bsm-header-h: 66px; }

  .bsm-header__cta { display: none; }
  .bsm-navtoggle { display: inline-flex; }

  .bsm-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: auto;
    z-index: 92;
    width: min(88vw, 360px);
    margin: 0;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    padding: calc(var(--bsm-header-h) + 18px) 22px 28px;
    background: linear-gradient(165deg, #102A4C 0%, #0B1B33 58%, #0B1B33 100%);
    border-left: 1px solid rgba(53, 240, 192, 0.4);
    box-shadow: -30px 0 60px -40px rgba(0, 0, 0, 0.95);
    overflow-y: auto;
    visibility: hidden;
    transform: translateX(103%);
    transition: transform 0.28s cubic-bezier(0.22, 0.68, 0.18, 1), visibility 0s linear 0.28s;
  }
  .bsm-header[data-open="true"] .bsm-nav {
    visibility: visible;
    transform: translateX(0);
    transition: transform 0.28s cubic-bezier(0.22, 0.68, 0.18, 1), visibility 0s;
  }

  .bsm-nav__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding-bottom: 14px;
    margin-bottom: 10px;
    border-bottom: 1px solid rgba(46, 74, 107, 0.9);
  }
  .bsm-nav__headtitle {
    font-family: var(--bsm-font-accent);
    font-size: 11px;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--bsm-steel);
  }
  .bsm-nav__close {
    padding: 6px 10px;
    font-size: 12.5px;
    letter-spacing: 0.12em;
    color: var(--bsm-teal);
    border: 1px solid rgba(53, 240, 192, 0.4);
    clip-path: var(--bsm-cut-sm);
  }
  .bsm-nav__close:hover { background: rgba(53, 240, 192, 0.16); }

  .bsm-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    width: 100%;
  }
  .bsm-nav__link {
    padding: 14px 8px;
    font-family: var(--bsm-font-serif);
    font-size: 17px;
    letter-spacing: 0.04em;
    color: rgba(251, 247, 239, 0.86);
    border-bottom: 1px solid rgba(46, 74, 107, 0.45);
    clip-path: none;
  }
  .bsm-nav__link:hover { background: rgba(53, 240, 192, 0.1); }
  .bsm-nav__link[aria-current="page"] {
    background: rgba(53, 240, 192, 0.14);
    padding-left: 16px;
  }
  .bsm-nav__link[aria-current="page"]::after {
    left: 0;
    right: auto;
    top: 50%;
    bottom: auto;
    width: 3px;
    height: 22px;
    margin-top: -11px;
    transform: none;
  }
  .bsm-nav__index { font-size: 12px; color: var(--bsm-teal); }
  .bsm-nav__label { font-size: inherit; }

  .bsm-nav__foot {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: auto;
    padding-top: 22px;
  }
  .bsm-nav__cta { width: 100%; padding-block: 14px; }
  .bsm-nav__aux {
    font-size: 13px;
    letter-spacing: 0.1em;
    color: rgba(251, 247, 239, 0.7);
    text-decoration: underline;
    text-decoration-color: rgba(53, 240, 192, 0.6);
    text-underline-offset: 5px;
  }
  .bsm-nav__aux:hover { color: var(--bsm-teal); }

  .bsm-footer__top { grid-template-columns: 1fr; }
  .bsm-footer__cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 560px) {
  body { font-size: 16px; }
  .bsm-footer__cols { grid-template-columns: 1fr; gap: 24px; }
  .bsm-footer__download { max-width: none; }
  .bsm-footer__meta { flex-direction: column; align-items: flex-start; }
  .bsm-footer__icp { margin-left: 0; }
  .bsm-brand__mark { width: 40px; height: 40px; font-size: 23px; }
  .bsm-brand__lockup { font-size: 17px; }
  .bsm-brand__sub { font-size: 9px; letter-spacing: 0.22em; }
}

@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;
    scroll-behavior: auto !important;
  }
  .bsm-reveal { opacity: 1; transform: none; }
  .bsm-header,
  .bsm-nav,
  .bsm-progress,
  .bsm-skip { transition: none !important; }
}