:root {
  --bp-void: #050B18;
  --bp-panel: #0B1729;
  --bp-line: #123A5E;
  --bp-cyan: #25E6D8;
  --bp-teal: #0E7A78;
  --bp-hot: #FF5A2B;
  --bp-amber: #FF9A3C;
  --bp-paper: #F2E9DA;
  --bp-gray: #B9C7D6;
  --bp-mist: #CFE9EE;
  --bp-mute: #7C93A8;
  --bp-anno: #5E8AA6;
  --bp-r: 3px;
  --bp-shell: 1360px;
  --bp-mono: ui-monospace, "JetBrains Mono", "IBM Plex Mono", "SFMono-Regular", Menlo, Consolas, monospace;
  --bp-sans: "Noto Sans SC", "Source Han Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

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

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

body {
  margin: 0;
  background:
    radial-gradient(1200px 620px at 78% -8%, rgba(14, 122, 120, 0.20), transparent 62%),
    radial-gradient(900px 520px at 4% 108%, rgba(255, 90, 43, 0.10), transparent 60%),
    var(--bp-void);
  background-attachment: fixed;
  color: var(--bp-gray);
  font-family: var(--bp-sans);
  font-size: 17px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(18, 58, 94, 0.42) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(18, 58, 94, 0.42) 1px, transparent 1px);
  background-size: 68px 68px;
  opacity: 0.5;
}

main { position: relative; z-index: 1; }

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

a { color: var(--bp-cyan); text-decoration: none; }
a:hover { color: var(--bp-mist); }

h1, h2, h3, h4 {
  font-family: var(--bp-sans);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--bp-paper);
  margin: 0 0 0.6em;
}
h1 { font-size: clamp(34px, 6vw, 68px); }
h2 { font-size: clamp(26px, 3.6vw, 40px); }
h3 { font-size: clamp(20px, 2.4vw, 26px); }
p { margin: 0 0 1.1em; }

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

/* ---------- 通用容器与网格 ---------- */
.bp-shell {
  width: 100%;
  max-width: var(--bp-shell);
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 48px);
}

.bp-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2.2vw, 28px);
}
.bp-col-3 { grid-column: span 3; }
.bp-col-4 { grid-column: span 4; }
.bp-col-6 { grid-column: span 6; }
.bp-col-8 { grid-column: span 8; }
.bp-col-12 { grid-column: span 12; }

.bp-prose { max-width: 42em; font-size: 17px; line-height: 1.75; color: var(--bp-gray); }
.bp-prose h2 { margin-top: 1.6em; }
.bp-prose h3 { margin-top: 1.4em; color: var(--bp-mist); }
.bp-prose a { border-bottom: 1px solid rgba(37, 230, 216, 0.5); }
.bp-prose a:hover { border-bottom-color: var(--bp-cyan); }

.bp-lead { font-size: clamp(17px, 1.6vw, 20px); line-height: 1.7; color: var(--bp-mist); max-width: 34em; }

.bp-rule { border: 0; border-top: 1px solid var(--bp-line); margin: 0; }

/* ---------- 数字与注释 ---------- */
.bp-num {
  font-family: var(--bp-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
  color: var(--bp-paper);
}
.bp-num--hot { color: var(--bp-hot); }

.bp-annot {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--bp-anno);
  line-height: 1.4;
}
.bp-annot--v {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  letter-spacing: 0.28em;
}

/* ---------- 编号章节标记 ---------- */
.bp-mark {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
  padding-bottom: 12px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--bp-line);
}
.bp-mark__no {
  font-family: var(--bp-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--bp-cyan);
}
.bp-mark__label {
  font-size: 12px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--bp-anno);
}

/* ---------- 按钮 ---------- */
.bp-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6em;
  min-height: 44px;
  padding: 0 20px;
  border: 1px solid var(--bp-line);
  border-radius: var(--bp-r);
  background: rgba(11, 23, 41, 0.85);
  color: var(--bp-mist);
  font-family: var(--bp-sans);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}
.bp-btn:hover { border-color: rgba(37, 230, 216, 0.6); color: var(--bp-paper); transform: translateY(-1px); }
.bp-btn--hot { background: var(--bp-hot); border-color: var(--bp-hot); color: #1A0500; font-weight: 800; }
.bp-btn--hot:hover { background: #FF7048; border-color: #FF7048; color: #1A0500; }
.bp-btn--cyan { border-color: rgba(37, 230, 216, 0.55); color: var(--bp-cyan); background: rgba(37, 230, 216, 0.08); }
.bp-btn--cyan:hover { background: rgba(37, 230, 216, 0.16); color: var(--bp-paper); }
.bp-btn--ghost { background: transparent; color: var(--bp-gray); }
.bp-btn--ghost:hover { color: var(--bp-paper); border-color: rgba(37, 230, 216, 0.5); }

/* ---------- 面包屑 ---------- */
.bp-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
  font-family: var(--bp-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--bp-anno);
}
.bp-crumbs a { color: var(--bp-mute); border-bottom: 1px solid transparent; }
.bp-crumbs a:hover { color: var(--bp-cyan); border-bottom-color: rgba(37, 230, 216, 0.6); }
.bp-crumbs__sep { color: var(--bp-teal); }

/* ---------- 卡片与标签 ---------- */
.bp-card {
  position: relative;
  padding: 20px 22px;
  background: linear-gradient(180deg, rgba(11, 23, 41, 0.95), rgba(5, 11, 24, 0.92));
  border: 1px solid var(--bp-line);
  border-radius: var(--bp-r);
}
.bp-card--score { border-left: 3px solid var(--bp-hot); }
.bp-card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(18, 58, 94, 0.7);
}
.bp-card__title { margin: 0; font-size: 17px; font-weight: 800; color: var(--bp-paper); letter-spacing: 0; }
.bp-card__meta { font-family: var(--bp-mono); font-size: 12px; letter-spacing: 0.1em; color: var(--bp-anno); }

.bp-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 26px;
  padding: 0 10px;
  border: 1px solid rgba(37, 230, 216, 0.4);
  border-radius: 2px;
  background: rgba(14, 122, 120, 0.16);
  color: var(--bp-cyan);
  font-size: 12px;
  letter-spacing: 0.1em;
  white-space: nowrap;
}
.bp-tag--hot { border-color: rgba(255, 90, 43, 0.5); background: rgba(255, 90, 43, 0.14); color: var(--bp-hot); }
.bp-tag--amber { border-color: rgba(255, 154, 60, 0.5); background: rgba(255, 154, 60, 0.14); color: var(--bp-amber); }
.bp-tag--teal { border-color: rgba(14, 122, 120, 0.7); background: rgba(14, 122, 120, 0.1); color: var(--bp-mist); }

/* ---------- 横向信息带 ---------- */
.bp-scroller {
  display: flex;
  gap: 14px;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x proximity;
  padding: 4px 0 16px;
  scrollbar-width: thin;
  scrollbar-color: var(--bp-teal) transparent;
}
.bp-scroller > * { flex: 0 0 auto; scroll-snap-align: start; }
.bp-scroller:focus-visible { outline: 2px solid var(--bp-cyan); outline-offset: 6px; }
.bp-scroller::-webkit-scrollbar { height: 6px; }
.bp-scroller::-webkit-scrollbar-track { background: rgba(18, 58, 94, 0.35); }
.bp-scroller::-webkit-scrollbar-thumb { background: var(--bp-teal); }

/* ---------- 图片容器 ---------- */
.bp-media {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--bp-line);
  border-radius: var(--bp-r);
  background:
    radial-gradient(120% 90% at 18% 8%, rgba(37, 230, 216, 0.16), transparent 55%),
    radial-gradient(100% 80% at 92% 100%, rgba(255, 90, 43, 0.16), transparent 60%),
    repeating-linear-gradient(90deg, rgba(18, 58, 94, 0.5) 0 1px, transparent 1px 44px),
    linear-gradient(180deg, var(--bp-panel), var(--bp-void));
}
.bp-media--square { aspect-ratio: 1 / 1; }
.bp-media--wide { aspect-ratio: 21 / 9; }
.bp-media__img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.bp-media__caption {
  position: absolute;
  left: 14px;
  bottom: 12px;
  padding: 4px 9px;
  background: rgba(5, 11, 24, 0.76);
  border: 1px solid rgba(18, 58, 94, 0.9);
  font-family: var(--bp-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--bp-mist);
}

/* ---------- 滚动显现 ---------- */
.bp-reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.62s ease, transform 0.62s cubic-bezier(0.22, 0.7, 0.3, 1);
  transition-delay: var(--bp-delay, 0ms);
  will-change: opacity, transform;
}
.bp-reveal.is-in { opacity: 1; transform: none; }

/* ---------- 跳过链接 ---------- */
.bp-skip {
  position: absolute;
  left: 14px;
  top: -64px;
  z-index: 220;
  padding: 11px 18px;
  background: var(--bp-cyan);
  color: #04121A;
  font-size: 14px;
  font-weight: 800;
  border-radius: var(--bp-r);
  transition: top 0.18s ease;
}
.bp-skip:focus,
.bp-skip:focus-visible { top: 12px; color: #04121A; }

/* ---------- 头部 ---------- */
.bp-masthead {
  position: sticky;
  top: 0;
  z-index: 80;
  background: linear-gradient(180deg, rgba(5, 11, 24, 0.97), rgba(5, 11, 24, 0.9));
  border-bottom: 1px solid var(--bp-line);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.bp-upper {
  border-bottom: 1px solid rgba(18, 58, 94, 0.72);
  background: rgba(4, 8, 18, 0.66);
}
.bp-upper__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 44px;
  padding-block: 4px;
}

.bp-sign { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; }
.bp-sign__mark {
  width: 22px;
  height: 22px;
  flex: 0 0 auto;
  clip-path: polygon(0 7px, 7px 0, 100% 0, 100% calc(100% - 7px), calc(100% - 7px) 100%, 0 100%);
  background: linear-gradient(135deg, var(--bp-cyan), var(--bp-teal) 70%, #0A3A4A);
  box-shadow: 0 0 0 1px rgba(37, 230, 216, 0.35);
}
.bp-sign__text { display: flex; flex-direction: column; }
.bp-sign__name {
  font-size: 15px;
  font-weight: 900;
  letter-spacing: 0.02em;
  color: var(--bp-paper);
  line-height: 1.25;
}
.bp-sign__line {
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--bp-anno);
  line-height: 1.4;
}

.bp-upper__nav { display: flex; align-items: center; gap: 20px; }
.bp-upper__link {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--bp-mute);
  padding: 10px 2px;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.bp-upper__link:hover { color: var(--bp-cyan); border-bottom-color: rgba(37, 230, 216, 0.7); }

.bp-live {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  height: 30px;
  padding: 0 13px;
  border: 1px solid rgba(255, 90, 43, 0.5);
  border-radius: 2px;
  background: linear-gradient(90deg, rgba(255, 90, 43, 0.2), rgba(255, 90, 43, 0.04));
  color: var(--bp-paper);
  font-size: 12px;
  letter-spacing: 0.12em;
  white-space: nowrap;
  transition: border-color 0.2s ease, background 0.2s ease;
}
.bp-live:hover { border-color: var(--bp-hot); background: linear-gradient(90deg, rgba(255, 90, 43, 0.3), rgba(255, 90, 43, 0.08)); }
.bp-live__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--bp-hot);
  box-shadow: 0 0 0 3px rgba(255, 90, 43, 0.18), 0 0 10px rgba(255, 90, 43, 0.85);
}

.bp-lower__inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: 22px;
  min-height: 62px;
}
.bp-lower__index {
  font-family: var(--bp-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--bp-teal);
  white-space: nowrap;
}
.bp-lower__meta {
  margin-left: auto;
  font-family: var(--bp-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: #4E7F92;
  white-space: nowrap;
}

.bp-nav { flex: 1 1 auto; min-width: 0; }
.bp-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(6px, 1.6vw, 26px);
  margin: 0;
  padding: 0;
  list-style: none;
}
.bp-nav__item { flex: 0 0 auto; }
.bp-nav__link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 2px;
  border-bottom: 2px solid transparent;
  color: var(--bp-gray);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.01em;
  white-space: nowrap;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.bp-nav__link:hover { color: var(--bp-cyan); border-bottom-color: rgba(37, 230, 216, 0.8); }
.bp-nav__link[aria-current="page"] {
  color: var(--bp-paper);
  border-bottom-color: var(--bp-cyan);
  box-shadow: inset 0 -6px 12px -8px rgba(37, 230, 216, 0.9);
}

.bp-nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  height: 38px;
  padding: 0 13px;
  border: 1px solid var(--bp-line);
  border-radius: var(--bp-r);
  background: rgba(11, 23, 41, 0.9);
  color: var(--bp-mist);
  font-family: var(--bp-sans);
  font-size: 12px;
  letter-spacing: 0.16em;
  cursor: pointer;
}
.bp-nav-toggle__bars { display: inline-flex; flex-direction: column; gap: 3px; }
.bp-nav-toggle__bars i { display: block; width: 14px; height: 1px; background: var(--bp-cyan); }

.bp-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: rgba(18, 58, 94, 0.55);
}
.bp-progress__bar {
  display: block;
  height: 100%;
  width: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--bp-cyan), var(--bp-hot));
  transition: transform 0.12s linear;
}

/* ---------- 页脚 ---------- */
.bp-foot {
  position: relative;
  z-index: 1;
  margin-top: clamp(48px, 8vw, 96px);
  border-top: 1px solid var(--bp-line);
  background: linear-gradient(180deg, rgba(5, 11, 24, 0.6), #071120 62%, #04080F);
}
.bp-foot__inner { padding-block: clamp(40px, 6vw, 64px) 28px; }

.bp-foot__grid {
  display: grid;
  grid-template-columns: minmax(230px, 1.3fr) repeat(3, minmax(150px, 1fr));
  gap: 36px 32px;
}
.bp-foot__brand-name {
  display: block;
  font-size: 20px;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--bp-paper);
}
.bp-foot__brand-line {
  margin: 10px 0 14px;
  max-width: 24em;
  font-size: 14px;
  line-height: 1.7;
  color: var(--bp-mute);
}

.bp-foot__col-title {
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(18, 58, 94, 0.8);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--bp-cyan);
}
.bp-foot__links { margin: 0; padding: 0; list-style: none; display: grid; gap: 2px; }
.bp-foot__link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-height: 44px;
  font-size: 14px;
  color: var(--bp-gray);
}
.bp-foot__link::before {
  content: "";
  width: 7px;
  height: 1px;
  background: var(--bp-teal);
  transition: width 0.2s ease, background 0.2s ease;
}
.bp-foot__link:hover { color: var(--bp-paper); }
.bp-foot__link:hover::before { width: 15px; background: var(--bp-cyan); }

.bp-foot__contact {
  display: grid;
  grid-template-columns: minmax(260px, 1fr) minmax(260px, 1.35fr);
  gap: 22px 44px;
  align-items: start;
  margin-top: clamp(32px, 4vw, 48px);
  padding-top: 26px;
  border-top: 1px solid var(--bp-line);
}
.bp-foot__contact-rows { display: grid; gap: 8px; font-style: normal; }
.bp-foot__contact-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  font-size: 14px;
  color: var(--bp-gray);
}
.bp-foot__contact-row .bp-annot { flex: 0 0 auto; min-width: 76px; }
.bp-foot__note { margin: 0; max-width: 42em; font-size: 13px; line-height: 1.75; color: var(--bp-mute); }

.bp-foot__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 26px;
  margin-top: 32px;
  padding-top: 18px;
  border-top: 1px solid rgba(18, 58, 94, 0.72);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--bp-mute);
}
.bp-foot__legal-meta { font-family: var(--bp-mono); }
.bp-foot__legal-links { display: flex; flex-wrap: wrap; gap: 20px; }
.bp-foot__legal-links a {
  color: var(--bp-gray);
  padding-bottom: 3px;
  border-bottom: 1px solid rgba(18, 58, 94, 0.95);
}
.bp-foot__legal-links a:hover { color: var(--bp-cyan); border-bottom-color: var(--bp-cyan); }

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .bp-grid { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .bp-col-3 { grid-column: span 3; }
  .bp-col-4 { grid-column: span 6; }
  .bp-col-6 { grid-column: span 6; }
  .bp-col-8 { grid-column: span 6; }
  .bp-col-12 { grid-column: span 6; }

  .bp-lower__index { display: none; }
  .bp-foot__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .bp-foot__contact { grid-template-columns: 1fr; }
}

@media (max-width: 960px) {
  .bp-nav-toggle { display: inline-flex; }
  .bp-lower__inner { flex-wrap: wrap; gap: 10px 14px; padding-block: 10px; min-height: 0; }
  .bp-lower__meta { margin-left: auto; }

  .bp-nav {
    order: 3;
    flex: 1 0 100%;
    border-top: 1px solid rgba(18, 58, 94, 0.6);
    padding-top: 8px;
  }
  .bp-nav__list {
    overflow-x: auto;
    flex-wrap: nowrap;
    gap: 20px;
    padding-bottom: 6px;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }
  .bp-nav__list::-webkit-scrollbar { display: none; }

  .bp-nav[data-open] .bp-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }
  .bp-nav[data-open] .bp-nav__item { flex: 1 1 auto; }
  .bp-nav[data-open] .bp-nav__link {
    width: 100%;
    min-height: 48px;
    padding-left: 12px;
    border-bottom: 1px solid rgba(18, 58, 94, 0.55);
    border-left: 2px solid transparent;
  }
  .bp-nav[data-open] .bp-nav__link[aria-current="page"] {
    border-bottom-color: rgba(18, 58, 94, 0.55);
    border-left-color: var(--bp-cyan);
  }
}

@media (max-width: 720px) {
  body { font-size: 16px; }
  body::before { background-size: 44px 44px; }
  .bp-sign__line { display: none; }
  .bp-upper__nav { gap: 12px; }
  .bp-upper__link { letter-spacing: 0.1em; }
  .bp-lower__meta { display: none; }
  .bp-card { padding: 16px; }
  .bp-media { aspect-ratio: 4 / 3; }
}

@media (max-width: 620px) {
  .bp-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .bp-col-3,
  .bp-col-4,
  .bp-col-6,
  .bp-col-8,
  .bp-col-12 { grid-column: span 2; }

  .bp-foot__grid { grid-template-columns: 1fr; gap: 26px; }
  .bp-foot__brand { padding-bottom: 20px; border-bottom: 1px solid rgba(18, 58, 94, 0.72); }
  .bp-foot__contact-row .bp-annot { min-width: 64px; }
}

@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;
  }
  .bp-reveal { opacity: 1; transform: none; }
  .bp-progress__bar { transition: none; }
  .bp-btn:hover { transform: none; }
}