/* =========================================================
   多宝体育 · 站点共享样式  /assets/site.css
   框架式坐标导航 + 珠宝色分区 + 战术板纸层
   ========================================================= */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 118px; }
body { margin: 0; }
h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
img, svg, video { display: block; max-width: 100%; }
a { color: inherit; }
[hidden] { display: none !important; }

:root {
  /* 珠宝色分区 */
  --db-space: #071A2F;
  --db-space-deep: #05121F;
  --db-mist: #EAF6F5;
  --db-teal: #0B2B33;
  --db-indigo: #1B1440;
  --db-wine: #5A1F33;
  --db-ink: #030B14;
  /* 强调 */
  --db-cyan: #38F2D2;
  --db-amber: #FFB547;
  --db-magenta: #FF4D8D;
  --db-slate: #8FA6B8;
  /* 线条与透明层 */
  --db-line: rgba(56, 242, 210, 0.26);
  --db-line-2: rgba(143, 166, 184, 0.26);
  --db-cyan-soft: rgba(56, 242, 210, 0.10);
  --db-cyan-glow: rgba(56, 242, 210, 0.22);
  /* 字体 */
  --db-f-display: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --db-f-mono: "IBM Plex Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;
  /* 度量 */
  --db-max: 1320px;
  --db-pad: 72px;
  --db-gap: 24px;
  --db-radius: 3px;
  --db-ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

body {
  font-family: var(--db-f-display);
  font-size: 16px;
  line-height: 1.7;
  color: var(--db-mist);
  background-color: var(--db-space);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

:where(a, button, [tabindex], summary, input, select, textarea):focus-visible {
  outline: 2px solid var(--db-cyan);
  outline-offset: 3px;
  border-radius: 2px;
}

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

/* ---------------- 跳转链接 ---------------- */
.db-skip {
  position: fixed;
  top: -80px;
  left: 16px;
  z-index: 300;
  display: inline-block;
  padding: 12px 20px;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--db-space);
  background: var(--db-cyan);
  border-radius: 2px;
  text-decoration: none;
  transition: top 0.18s var(--db-ease);
}
.db-skip:focus-visible,
.db-skip:focus { top: 16px; }

/* =========================================================
   头部：坐标框导航
   ========================================================= */
.db-header {
  position: sticky;
  top: 0;
  z-index: 80;
  color: var(--db-mist);
  background-color: var(--db-space);
  background-image:
    repeating-linear-gradient(90deg, rgba(56, 242, 210, 0.07) 0 1px, transparent 1px 96px),
    linear-gradient(180deg, #071A2F 0%, #061626 100%);
  border-bottom: 1px solid var(--db-line);
  transition: box-shadow 0.25s var(--db-ease);
}
.db-header[data-scrolled] {
  box-shadow: 0 18px 34px -26px #000, inset 0 1px 0 rgba(56, 242, 210, 0.35);
}

.db-header__inner {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 28px;
  width: 100%;
  max-width: var(--db-max);
  margin: 0 auto;
  padding: 0 var(--db-pad);
  min-height: 92px;
}

/* 品牌 */
.db-brand {
  display: inline-flex;
  align-items: center;
  gap: 13px;
  min-height: 44px;
  text-decoration: none;
  color: var(--db-mist);
}
.db-brand__mark {
  position: relative;
  flex: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--db-line);
  background:
    radial-gradient(circle at 30% 20%, rgba(56, 242, 210, 0.22), transparent 62%),
    linear-gradient(135deg, rgba(56, 242, 210, 0.16), rgba(27, 20, 64, 0.66));
}
.db-brand__mark::before {
  content: "";
  position: absolute;
  inset: 8px;
  border: 1px solid rgba(56, 242, 210, 0.6);
  transform: rotate(45deg);
  transition: transform 0.42s var(--db-ease);
}
.db-brand__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 7px;
  height: 7px;
  margin: -3.5px 0 0 -3.5px;
  border-radius: 50%;
  background: var(--db-amber);
}
.db-brand:hover .db-brand__mark::before { transform: rotate(135deg); }
.db-brand__text {
  display: flex;
  flex-direction: column;
  gap: 3px;
  line-height: 1.15;
}
.db-brand__name {
  font-size: 19px;
  font-weight: 900;
  letter-spacing: 0.02em;
}
.db-brand__tag {
  font-family: var(--db-f-mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--db-slate);
}

/* 主导航 */
.db-nav { justify-self: center; min-width: 0; }
.db-nav__list {
  display: flex;
  align-items: stretch;
  gap: 2px;
}
.db-nav__item { flex: none; }
.db-nav__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 12px 13px;
  border-radius: 2px;
  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: rgba(234, 246, 245, 0.82);
  text-decoration: none;
  transition: color 0.18s var(--db-ease), background-color 0.18s var(--db-ease);
}
.db-nav__idx {
  font-family: var(--db-f-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--db-slate);
  transition: color 0.18s var(--db-ease);
}
.db-nav__label { position: relative; }
.db-nav__label::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -6px;
  height: 2px;
  background: var(--db-cyan);
  transition: right 0.22s var(--db-ease);
}
.db-nav__link:hover,
.db-nav__link:focus-visible {
  color: var(--db-cyan);
  background: rgba(56, 242, 210, 0.07);
}
.db-nav__link:hover .db-nav__idx,
.db-nav__link:focus-visible .db-nav__idx { color: var(--db-cyan); }
.db-nav__link:hover .db-nav__label::after,
.db-nav__link:focus-visible .db-nav__label::after { right: 0; }
.db-nav__link[aria-current="page"] { color: var(--db-cyan); }
.db-nav__link[aria-current="page"] .db-nav__idx { color: var(--db-amber); }
.db-nav__link[aria-current="page"] .db-nav__label::after {
  right: 0;
  background: var(--db-cyan);
}

/* 工具区 */
.db-header__tools {
  display: flex;
  align-items: center;
  gap: 12px;
  justify-self: end;
}

/* 移动索引按钮 */
.db-navtoggle {
  display: none;
  align-items: center;
  gap: 9px;
  min-height: 44px;
  padding: 0 12px;
  border: 1px solid var(--db-line);
  border-radius: 2px;
  color: var(--db-mist);
  font-family: var(--db-f-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  transition: border-color 0.18s var(--db-ease), color 0.18s var(--db-ease);
}
.db-navtoggle:hover { border-color: var(--db-cyan); color: var(--db-cyan); }
.db-navtoggle__bars {
  display: grid;
  gap: 4px;
  width: 18px;
}
.db-navtoggle__bar {
  height: 2px;
  background: var(--db-cyan);
  transition: transform 0.22s var(--db-ease), opacity 0.22s var(--db-ease);
}
.db-header[data-open] .db-navtoggle__bar:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.db-header[data-open] .db-navtoggle__bar:nth-child(2) { opacity: 0; }
.db-header[data-open] .db-navtoggle__bar:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* 阅读进度线 */
.db-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  overflow: hidden;
  background: rgba(56, 242, 210, 0.08);
  pointer-events: none;
}
.db-progress__bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--db-cyan), var(--db-amber));
  transition: width 0.12s linear;
}

/* =========================================================
   按钮
   ========================================================= */
.db-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: 2px;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.03em;
  text-decoration: none;
  transition: background-color 0.18s var(--db-ease), color 0.18s var(--db-ease),
              border-color 0.18s var(--db-ease), box-shadow 0.18s var(--db-ease),
              transform 0.18s var(--db-ease);
}
.db-btn--primary {
  background: var(--db-cyan);
  border-color: var(--db-cyan);
  color: #04202B;
}
.db-btn--primary:hover {
  background: #7ff8e4;
  border-color: #7ff8e4;
  box-shadow: 0 0 0 3px var(--db-cyan-soft);
}
.db-btn--ghost {
  background: transparent;
  border-color: rgba(56, 242, 210, 0.5);
  color: var(--db-cyan);
}
.db-btn--ghost:hover {
  background: var(--db-cyan-soft);
  border-color: var(--db-cyan);
}
.db-btn--wide { width: 100%; }
.db-btn:active { transform: translateY(1px); }

/* =========================================================
   页脚：靛紫深层分区
   ========================================================= */
.db-footer {
  position: relative;
  overflow: hidden;
  color: var(--db-mist);
  background-color: var(--db-teal);
  background-image:
    radial-gradient(1100px 400px at 84% -12%, rgba(56, 242, 210, 0.15), transparent 62%),
    radial-gradient(880px 380px at 4% 112%, rgba(255, 181, 71, 0.10), transparent 66%),
    repeating-linear-gradient(90deg, rgba(56, 242, 210, 0.06) 0 1px, transparent 1px 88px),
    repeating-linear-gradient(0deg, rgba(56, 242, 210, 0.05) 0 1px, transparent 1px 88px),
    linear-gradient(158deg, #0B2B33 0%, #1B1440 56%, #071A2F 100%);
  border-top: 1px solid var(--db-line);
}
.db-footer__top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
  gap: 40px 32px;
  width: 100%;
  max-width: var(--db-max);
  margin: 0 auto;
  padding: 72px var(--db-pad) 54px;
  border-bottom: 1px solid rgba(234, 246, 245, 0.14);
}
.db-footer__brand { max-width: 40ch; }
.db-footer__kicker {
  font-family: var(--db-f-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--db-cyan);
}
.db-footer__name {
  margin-top: 14px;
  font-size: 26px;
  font-weight: 900;
  letter-spacing: -0.01em;
  line-height: 1.2;
}
.db-footer__desc {
  margin-top: 12px;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(234, 246, 245, 0.72);
}
.db-footer__cta { margin-top: 22px; }

.db-footer__col { min-width: 0; }
.db-footer__coltitle {
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(234, 246, 245, 0.16);
  font-family: var(--db-f-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--db-slate);
}
.db-footer__links {
  display: grid;
  gap: 2px;
  margin-top: 10px;
}
.db-footer__link {
  display: inline-block;
  padding: 8px 0;
  font-size: 14px;
  color: rgba(234, 246, 245, 0.8);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--db-ease), border-color 0.18s var(--db-ease);
}
.db-footer__link:hover,
.db-footer__link:focus-visible {
  color: var(--db-cyan);
  border-bottom-color: var(--db-cyan);
}

.db-footer__contact dl {
  display: grid;
  gap: 14px;
  margin-top: 16px;
}
.db-footer__pair { min-width: 0; }
.db-footer__contact dt {
  font-family: var(--db-f-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--db-slate);
}
.db-footer__contact dd {
  margin: 3px 0 0;
  font-size: 13.5px;
  line-height: 1.65;
  color: rgba(234, 246, 245, 0.9);
  overflow-wrap: anywhere;
}

.db-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px 24px;
  width: 100%;
  max-width: var(--db-max);
  margin: 0 auto;
  padding: 22px var(--db-pad) 32px;
  font-family: var(--db-f-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--db-slate);
}
.db-footer__copy { margin: 0; }
.db-footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 18px;
}
.db-footer__legal a {
  color: rgba(234, 246, 245, 0.78);
  text-decoration: none;
  border-bottom: 1px solid rgba(56, 242, 210, 0.32);
  transition: color 0.18s var(--db-ease), border-color 0.18s var(--db-ease);
}
.db-footer__legal a:hover,
.db-footer__legal a:focus-visible {
  color: var(--db-cyan);
  border-bottom-color: var(--db-cyan);
}
.db-footer__icp {
  margin: 0;
  color: rgba(143, 166, 184, 0.9);
}

/* =========================================================
   布局骨架
   ========================================================= */
.db-wrap {
  width: 100%;
  max-width: var(--db-max);
  margin: 0 auto;
  padding-left: var(--db-pad);
  padding-right: var(--db-pad);
}
.db-section { padding: clamp(56px, 7vw, 104px) 0; }
.db-section--tight { padding: clamp(36px, 4vw, 60px) 0; }
.db-pagehead {
  padding: clamp(36px, 5vw, 72px) 0 clamp(26px, 3vw, 44px);
  border-bottom: 1px solid var(--db-line-2);
}
.db-grid {
  display: grid;
  gap: var(--db-gap);
  grid-template-columns: repeat(12, minmax(0, 1fr));
}
.db-rule {
  height: 0;
  margin: 0;
  border: 0;
  border-top: 1px solid var(--db-line-2);
}

/* =========================================================
   排版
   ========================================================= */
.db-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--db-f-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--db-cyan);
}
.db-eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: currentColor;
}
.db-h1, .db-h2, .db-h3 {
  font-family: var(--db-f-display);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.015em;
}
.db-h1 { font-size: clamp(2.2rem, 5.2vw, 4.1rem); }
.db-h2 { font-size: clamp(1.7rem, 3.4vw, 2.6rem); }
.db-h3 { font-size: clamp(1.15rem, 2vw, 1.5rem); letter-spacing: -0.01em; }
.db-lead {
  max-width: 68ch;
  font-size: clamp(15px, 1.35vw, 18px);
  line-height: 1.8;
  color: rgba(234, 246, 245, 0.78);
}
.db-text {
  max-width: 72ch;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(234, 246, 245, 0.8);
}
.db-num {
  font-family: var(--db-f-mono);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
  color: var(--db-amber);
}

/* =========================================================
   卡片与纸张
   ========================================================= */
.db-card {
  position: relative;
  padding: 22px;
  border: 1px solid var(--db-line-2);
  border-radius: var(--db-radius);
  background: linear-gradient(180deg, rgba(10, 34, 56, 0.96), rgba(7, 26, 47, 0.96));
}
.db-card--accent { border-top: 2px solid var(--db-cyan); }
.db-paper {
  position: relative;
  padding: clamp(22px, 3vw, 40px);
  border: 1px solid var(--db-ink);
  border-radius: 2px;
  background: var(--db-mist);
  color: var(--db-space);
  box-shadow:
    6px 6px 0 rgba(3, 11, 20, 0.5),
    inset 0 0 0 1px rgba(56, 242, 210, 0.28);
}
.db-paper .db-lead,
.db-paper .db-text { color: #1d3a4f; }
.db-paper .db-eyebrow { color: #0F6E63; }
.db-paper .db-rule { border-top-color: rgba(7, 26, 47, 0.18); }

/* =========================================================
   徽章 / 筛选 chips
   ========================================================= */
.db-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 3px 9px;
  border: 1px solid var(--db-magenta);
  border-radius: 2px;
  background: rgba(255, 77, 141, 0.12);
  color: var(--db-mist);
  font-family: var(--db-f-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.db-badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--db-magenta);
}
.db-badge--amber {
  border-color: var(--db-amber);
  background: rgba(255, 181, 71, 0.12);
  color: var(--db-amber);
}
.db-badge--amber::before { background: var(--db-amber); }
.db-badge--cyan {
  border-color: var(--db-cyan);
  background: var(--db-cyan-soft);
  color: var(--db-cyan);
}
.db-badge--cyan::before { background: var(--db-cyan); }

.db-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  padding: 0 15px;
  border: 1px solid var(--db-line-2);
  border-radius: 999px;
  background: transparent;
  font-size: 13.5px;
  font-weight: 600;
  color: rgba(234, 246, 245, 0.85);
  transition: color 0.18s var(--db-ease), border-color 0.18s var(--db-ease),
              background-color 0.18s var(--db-ease);
}
.db-chip:hover { border-color: var(--db-cyan); color: var(--db-cyan); }
.db-chip[aria-pressed="true"] {
  background: var(--db-cyan);
  border-color: var(--db-cyan);
  color: #04202B;
}

/* =========================================================
   标签页
   ========================================================= */
.db-tabs { position: relative; }
.db-tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  border-bottom: 1px solid var(--db-line-2);
}
.db-tab {
  min-height: 44px;
  padding: 10px 16px;
  border-bottom: 2px solid transparent;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--db-slate);
  transition: color 0.18s var(--db-ease), border-color 0.18s var(--db-ease),
              background-color 0.18s var(--db-ease);
}
.db-tab:hover { color: var(--db-mist); background: rgba(56, 242, 210, 0.06); }
.db-tab[aria-selected="true"] {
  color: var(--db-cyan);
  border-bottom-color: var(--db-cyan);
}
.db-tabpanel { margin-top: 22px; }
.db-tabpanel.is-entering {
  animation: dbTabIn 0.22s var(--db-ease) both;
}
@keyframes dbTabIn {
  from { opacity: 0; transform: translateX(10px); }
  to { opacity: 1; transform: none; }
}

/* =========================================================
   折叠面板
   ========================================================= */
.db-acc {
  border: 1px solid var(--db-line-2);
  border-radius: var(--db-radius);
  background: rgba(10, 34, 56, 0.6);
}
.db-acc + .db-acc { margin-top: 10px; }
.db-acc__btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  min-height: 54px;
  padding: 14px 18px;
  text-align: left;
  font-size: 15px;
  font-weight: 700;
  color: var(--db-mist);
  transition: background-color 0.18s var(--db-ease);
}
.db-acc__btn:hover { background: rgba(56, 242, 210, 0.07); }
.db-acc__sign {
  position: relative;
  flex: none;
  width: 14px;
  height: 14px;
}
.db-acc__sign::before,
.db-acc__sign::after {
  content: "";
  position: absolute;
  background: var(--db-cyan);
  transition: transform 0.22s var(--db-ease), opacity 0.22s var(--db-ease);
}
.db-acc__sign::before { left: 0; right: 0; top: 6px; height: 2px; }
.db-acc__sign::after { top: 0; bottom: 0; left: 6px; width: 2px; }
.db-acc__btn[aria-expanded="true"] .db-acc__sign::after {
  transform: scaleY(0);
  opacity: 0;
}
.db-acc__panel {
  padding: 0 18px 18px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(234, 246, 245, 0.78);
}
.db-acc__panel[hidden] { display: none; }

/* =========================================================
   面包屑
   ========================================================= */
.db-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--db-f-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--db-slate);
}
.db-crumbs a {
  color: var(--db-slate);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--db-ease), border-color 0.18s var(--db-ease);
}
.db-crumbs a:hover,
.db-crumbs a:focus-visible {
  color: var(--db-cyan);
  border-bottom-color: var(--db-cyan);
}
.db-crumbs__sep { color: rgba(143, 166, 184, 0.5); }
.db-crumbs [aria-current="page"] { color: var(--db-mist); }

/* =========================================================
   图片容器基础规则（供页面阶段使用）
   ========================================================= */
.db-media {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--db-line);
  border-radius: 2px;
  background-color: var(--db-teal);
  background-image:
    radial-gradient(circle at 78% 18%, rgba(56, 242, 210, 0.2), transparent 58%),
    repeating-linear-gradient(90deg, rgba(56, 242, 210, 0.09) 0 1px, transparent 1px 44px),
    repeating-linear-gradient(0deg, rgba(56, 242, 210, 0.09) 0 1px, transparent 1px 44px),
    linear-gradient(140deg, #0B2B33, #1B1440 62%, #071A2F);
}
.db-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.db-media::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid rgba(56, 242, 210, 0.18);
  pointer-events: none;
}
.db-media--wide { aspect-ratio: 21 / 9; }
.db-media--square { aspect-ratio: 1 / 1; }
.db-media--paper { border-color: var(--db-ink); }

/* =========================================================
   长文排版
   ========================================================= */
.db-prose {
  max-width: 72ch;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(234, 246, 245, 0.84);
}
.db-prose > * + * { margin-top: 1.05em; }
.db-prose h2,
.db-prose h3 {
  font-weight: 900;
  letter-spacing: -0.01em;
  line-height: 1.25;
  color: var(--db-mist);
}
.db-prose h2 { font-size: clamp(1.35rem, 2.4vw, 1.8rem); margin-top: 1.9em; }
.db-prose h3 { font-size: clamp(1.1rem, 1.8vw, 1.3rem); margin-top: 1.6em; }
.db-prose a {
  color: var(--db-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.db-prose ul, .db-prose ol { padding-left: 0; }
.db-prose li {
  position: relative;
  padding-left: 20px;
}
.db-prose li + li { margin-top: 0.55em; }
.db-prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 9px;
  height: 1px;
  background: var(--db-cyan);
}
.db-prose strong { color: var(--db-mist); font-weight: 800; }
.db-prose blockquote {
  margin: 1.4em 0;
  padding: 4px 0 4px 18px;
  border-left: 2px solid var(--db-amber);
  color: rgba(234, 246, 245, 0.72);
  font-size: 15.5px;
}

/* =========================================================
   显现 / 返回顶部
   ========================================================= */
[data-reveal] {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.42s var(--db-ease), transform 0.42s var(--db-ease);
}
[data-reveal="shown"] {
  opacity: 1;
  transform: none;
}

.db-totop {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 70;
  display: none;
  place-items: center;
  width: 46px;
  height: 46px;
  border: 1px solid var(--db-line);
  border-radius: 2px;
  background: rgba(7, 26, 47, 0.94);
  color: var(--db-cyan);
  font-family: var(--db-f-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
}
.db-totop[data-visible] { display: grid; }
.db-totop:hover { border-color: var(--db-cyan); }

/* =========================================================
   响应式
   ========================================================= */
@media (max-width: 1200px) {
  :root { --db-pad: 48px; }
  .db-footer__top { grid-template-columns: 1.4fr 1fr 1fr; }
  .db-footer__contact { grid-column: 1 / -1; }
  .db-footer__contact dl {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 14px 28px;
  }
}

@media (max-width: 1024px) {
  .db-header__inner { gap: 18px; }
  .db-nav__link { padding: 12px 10px; font-size: 13.5px; }
  .db-nav__idx { display: none; }
}

@media (max-width: 960px) {
  .db-header__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    min-height: 74px;
    gap: 14px;
  }
  .db-brand__mark { width: 40px; height: 40px; }
  .db-nav {
    display: none;
    grid-column: 1 / -1;
    justify-self: stretch;
    padding: 6px 0 18px;
    border-top: 1px solid var(--db-line-2);
  }
  .db-header[data-open] .db-nav { display: block; }
  .db-nav__list { flex-direction: column; gap: 0; }
  .db-nav__item { display: block; width: 100%; }
  .db-nav__link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 15px 2px;
    border-bottom: 1px solid rgba(143, 166, 184, 0.16);
    font-size: 16px;
    border-radius: 0;
  }
  .db-nav__idx { display: inline; font-size: 12px; }
  .db-nav__label::after { display: none; }
  .db-nav__link[aria-current="page"] {
    background: rgba(56, 242, 210, 0.08);
    padding-left: 12px;
  }
  .db-navtoggle { display: inline-flex; }
  .db-header__cta { padding: 0 14px; font-size: 13px; letter-spacing: 0.02em; }
  .db-footer__top { padding: 56px var(--db-pad) 40px; gap: 34px 28px; }
}

@media (max-width: 760px) {
  :root { --db-pad: 20px; --db-gap: 16px; }
  .db-brand__tag { display: none; }
  .db-footer__top { grid-template-columns: 1fr 1fr; }
  .db-footer__brand { grid-column: 1 / -1; max-width: none; }
  .db-footer__bottom { font-size: 11.5px; }
  .db-h1 { font-size: clamp(2rem, 8vw, 2.6rem); }
}

@media (max-width: 560px) {
  .db-header__cta { display: none; }
  .db-navtoggle__text { display: none; }
  .db-navtoggle { padding: 0 11px; }
  .db-brand__name { font-size: 17px; }
  .db-footer__top { grid-template-columns: 1fr; padding-top: 44px; }
  .db-footer__contact { grid-column: auto; }
  .db-footer__bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  .db-totop { right: 14px; bottom: 14px; width: 42px; height: 42px; }
}

/* =========================================================
   减少动态效果
   ========================================================= */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal] {
    opacity: 1;
    transform: none;
  }
  .db-tabpanel.is-entering { animation: none; }
  .db-progress__bar { transition: none; }
}