/* ==========================================================================
   申博娱乐CN · Site Kit
   夜间信息轨道 / 档案夹信息系统
   ========================================================================== */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body,
h1, h2, h3, h4, h5, p,
ul, ol, li, figure, figcaption, blockquote, dl, dd {
  margin: 0;
  padding: 0;
}

ul, ol { list-style: none; }

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

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

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

table { border-collapse: collapse; width: 100%; }

:where(a, button, summary, [tabindex]):focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 8px;
}

/* ---------- 2. Tokens ---------- */
:root {
  /* 珠宝色分区 */
  --ink-900: #06131F;
  --ink-800: #0B2A33;
  --ink-700: #1B1740;
  --wine: #4A1024;
  --cyan: #38F2D0;
  --gold: #F2C879;
  --rose: #F24D8A;
  --mist: #E8F1F2;
  --slate: #8FA6B2;

  --cyan-soft: rgba(56, 242, 208, 0.12);
  --cyan-line: rgba(56, 242, 208, 0.22);
  --gold-soft: rgba(242, 200, 121, 0.14);
  --rose-soft: rgba(242, 77, 138, 0.16);
  --slate-line: rgba(143, 166, 178, 0.22);

  /* 轨道尺寸 */
  --rail-a: 96px;
  --rail-b: 232px;
  --rail-w: calc(var(--rail-a) + var(--rail-b));
  --bar-h: 66px;

  /* 字体 */
  --font-display: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: ui-monospace, "JetBrains Mono", "Roboto Mono", "SFMono-Regular", Menlo, Consolas, monospace;

  /* 形状 */
  --r-xl: 34px;
  --r-lg: 26px;
  --r-md: 16px;
  --r-pill: 999px;

  /* 节奏 */
  --pad: clamp(18px, 4vw, 48px);
  --gap: clamp(16px, 2.2vw, 28px);
  --section-gap: clamp(56px, 8vw, 116px);

  /* 动效 */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --t-fast: 180ms;
  --t-mid: 300ms;

  --scroll-progress: 0;
}

/* ---------- 3. Base / 中文排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--ink-900);
  background-image:
    radial-gradient(80% 55% at 88% -5%, rgba(56, 242, 208, 0.09), transparent 62%),
    radial-gradient(55% 45% at 2% 102%, rgba(242, 200, 121, 0.07), transparent 68%),
    radial-gradient(40% 40% at 96% 88%, rgba(242, 77, 138, 0.07), transparent 70%);
  background-attachment: fixed;
  color: var(--mist);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.012em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

#main-content { scroll-margin-top: calc(var(--bar-h) + 16px); }

@media (min-width: 1024px) {
  body { padding-left: var(--rail-w); }
}

@media (max-width: 1023px) {
  body { padding-top: var(--bar-h); }
  body[data-nav-open] { overflow: hidden; }
}

/* ---------- 4. Skip link ---------- */
.skip-link {
  position: fixed;
  top: 14px;
  left: 14px;
  z-index: 200;
  padding: 12px 22px;
  border-radius: var(--r-pill);
  background: var(--gold);
  color: var(--ink-900);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  transform: translateY(-180%);
  transition: transform var(--t-fast) var(--ease);
}
.skip-link:focus { transform: translateY(0); }

/* ---------- 5. Header 轨道 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 60;
  display: flex;
  width: var(--rail-w);
  background: var(--ink-900);
}

/* 品牌窄轨 */
.header-rail {
  position: relative;
  flex: 0 0 var(--rail-a);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 26px 8px 22px;
  background: linear-gradient(180deg, #0A1C26 0%, #04101A 62%, #030C14 100%);
  border-right: 1px solid rgba(56, 242, 208, 0.14);
}
.header-rail::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--cyan), var(--gold) 58%, transparent);
  opacity: 0.55;
}

.brand-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 16px;
  background: linear-gradient(148deg, var(--cyan) 0%, #7DEFDA 48%, #B9F8EC 100%);
  color: #04101A;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 800;
  line-height: 1;
  box-shadow: 0 0 0 1px rgba(56, 242, 208, 0.55), 0 10px 26px rgba(56, 242, 208, 0.22);
  transition: transform var(--t-mid) var(--ease), box-shadow var(--t-mid) var(--ease);
}
.brand:hover .brand-mark,
.brand:focus-visible .brand-mark {
  transform: rotate(-6deg) scale(1.04);
  box-shadow: 0 0 0 1px var(--cyan), 0 12px 34px rgba(56, 242, 208, 0.34);
}

.brand-word {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.brand-name {
  writing-mode: vertical-rl;
  text-orientation: upright;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.28em;
  color: var(--mist);
}

.brand-tag { display: none; }

.brand-rotate {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.3em;
  color: var(--slate);
  opacity: 0.82;
}

.rail-count {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  font-family: var(--font-mono);
}
.rail-count-num { font-size: 15px; letter-spacing: 0.06em; color: var(--gold); }
.rail-count-label { font-size: 9px; letter-spacing: 0.26em; color: var(--slate); }

.rail-meter {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 2px;
  background: rgba(143, 166, 178, 0.16);
  overflow: hidden;
}
.rail-meter-fill {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleY(var(--scroll-progress));
  transform-origin: top center;
  background: linear-gradient(180deg, var(--cyan), var(--gold));
  transition: transform 120ms linear;
}

/* 移动端开关（桌面隐藏） */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 16px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(56, 242, 208, 0.38);
  background: rgba(56, 242, 208, 0.08);
  color: var(--cyan);
  font-size: 13px;
  font-weight: 600;
  transition: background var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.nav-toggle:hover { background: rgba(56, 242, 208, 0.16); border-color: var(--cyan); }

.nav-toggle-text { letter-spacing: 0.08em; white-space: nowrap; }

.nav-toggle-icon {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 16px;
  height: 12px;
}
.nav-toggle-icon span {
  display: block;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform var(--t-fast) var(--ease);
}
.site-header[data-open] .nav-toggle-icon span:nth-child(1) { transform: translateY(3px) rotate(45deg); }
.site-header[data-open] .nav-toggle-icon span:nth-child(2) { transform: translateY(-3px) rotate(-45deg); }

/* 栏目轨 */
.site-nav {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  flex-direction: column;
  padding: 28px 20px 22px;
  background: linear-gradient(180deg, #0B2029 0%, #07161F 55%, #050F18 100%);
  border-right: 1px solid rgba(56, 242, 208, 0.12);
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
  scrollbar-color: rgba(56, 242, 208, 0.32) transparent;
}

.nav-kicker {
  padding-left: 12px;
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--slate);
}

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

.nav-item { display: block; }

.nav-link {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 11px 12px;
  border-radius: 13px;
  border: 1px solid transparent;
  color: rgba(232, 241, 242, 0.82);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition:
    background var(--t-fast) var(--ease),
    border-color var(--t-fast) var(--ease),
    color var(--t-fast) var(--ease),
    transform var(--t-fast) var(--ease);
}
.nav-num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--slate);
}
.nav-label { min-width: 0; }

.nav-link:hover {
  background: rgba(56, 242, 208, 0.08);
  border-color: rgba(56, 242, 208, 0.26);
  color: var(--mist);
  transform: translateX(3px);
}

.nav-link[aria-current="page"] {
  background: linear-gradient(90deg, rgba(56, 242, 208, 0.18), rgba(56, 242, 208, 0.04));
  border-color: rgba(56, 242, 208, 0.5);
  color: #FFFFFF;
  font-weight: 700;
  box-shadow: inset 3px 0 0 var(--cyan);
}
.nav-link[aria-current="page"] .nav-num { color: var(--gold); }

.nav-foot {
  margin-top: auto;
  padding-top: 22px;
  border-top: 1px dashed rgba(143, 166, 178, 0.28);
  display: flex;
  flex-direction: column;
  gap: 9px;
}
.nav-foot-label {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.2em;
  color: var(--slate);
}
.nav-foot-value {
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.55;
  color: var(--cyan);
  word-break: break-all;
}

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: var(--r-pill);
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.03em;
  line-height: 1.2;
  text-align: center;
  transition:
    background var(--t-fast) var(--ease),
    color var(--t-fast) var(--ease),
    border-color var(--t-fast) var(--ease),
    transform var(--t-fast) var(--ease),
    box-shadow var(--t-fast) var(--ease);
}
.btn-primary {
  background: var(--gold);
  color: var(--ink-900);
  box-shadow: 0 10px 26px rgba(242, 200, 121, 0.2);
}
.btn-primary:hover {
  background: #FFDE9E;
  transform: translateY(-1px);
  box-shadow: 0 14px 32px rgba(242, 200, 121, 0.3);
}
.btn-ghost {
  border-color: rgba(56, 242, 208, 0.45);
  background: rgba(56, 242, 208, 0.05);
  color: var(--cyan);
}
.btn-ghost:hover { background: rgba(56, 242, 208, 0.14); border-color: var(--cyan); }
.btn-sm { padding: 10px 16px; font-size: 13px; }
.btn-block { display: flex; width: 100%; }

/* ---------- 7. Footer 档案柜 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(64px, 9vw, 128px);
  padding: clamp(46px, 6vw, 84px) var(--pad) 34px;
  background: linear-gradient(180deg, #06131F 0%, #08202A 42%, #06131F 100%);
  border-top: 1px solid rgba(56, 242, 208, 0.18);
  overflow: hidden;
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan), var(--gold), transparent);
  opacity: 0.75;
}
.site-footer::after {
  content: "";
  position: absolute;
  right: -140px;
  bottom: -170px;
  width: 430px;
  height: 430px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(56, 242, 208, 0.14), transparent 68%);
  pointer-events: none;
}

.footer-inner {
  position: relative;
  z-index: 1;
  max-width: 1240px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: clamp(30px, 4vw, 52px);
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(240px, 1fr) minmax(0, 2.1fr);
  gap: clamp(28px, 4vw, 64px);
  align-items: start;
}

.footer-brand { display: flex; flex-direction: column; gap: 16px; }

.footer-logo { display: inline-flex; align-items: center; gap: 12px; }
.footer-logo-mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 14px;
  background: linear-gradient(148deg, var(--cyan), #A6F5E6);
  color: #04101A;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  line-height: 1;
  box-shadow: 0 0 0 1px rgba(56, 242, 208, 0.5);
}
.footer-logo-word {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.footer-tagline {
  max-width: 34ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--slate);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 28px 24px;
}

.footer-col { display: flex; flex-direction: column; gap: 12px; min-width: 0; }

.footer-col-title {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.24em;
  color: var(--gold);
}

.footer-links { display: flex; flex-direction: column; gap: 9px; }

.footer-link {
  display: inline-block;
  width: fit-content;
  font-size: 14px;
  color: rgba(232, 241, 242, 0.78);
  border-bottom: 1px solid transparent;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.footer-link:hover { color: var(--cyan); border-bottom-color: rgba(56, 242, 208, 0.6); }

.footer-contact { display: flex; flex-direction: column; gap: 8px; margin-top: 4px; }
.footer-contact-line { display: flex; flex-direction: column; gap: 1px; }
.footer-contact-key {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.2em;
  color: var(--slate);
}
.footer-contact-val {
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.6;
  color: var(--mist);
  word-break: break-word;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  padding-top: 24px;
  border-top: 1px solid rgba(143, 166, 178, 0.18);
}
.footer-copy {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--slate);
}
.footer-dot { margin: 0 6px; color: var(--cyan); }

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--slate);
}
.footer-legal-link {
  color: rgba(232, 241, 242, 0.72);
  transition: color var(--t-fast) var(--ease);
}
.footer-legal-link:hover { color: var(--cyan); }

.footer-note {
  max-width: 70ch;
  font-size: 12px;
  line-height: 1.8;
  color: rgba(143, 166, 178, 0.92);
}

/* ---------- 8. 通用排版组件 ---------- */
.container {
  width: 100%;
  max-width: 1240px;
  margin-inline: auto;
  padding-inline: var(--pad);
}

.section { padding-block: var(--section-gap); }
.section--tight { padding-block: clamp(32px, 4vw, 60px); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(56, 242, 208, 0.35);
  background: rgba(56, 242, 208, 0.08);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.display-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6.4vw, 5.6rem);
  font-weight: 800;
  line-height: 0.96;
  letter-spacing: -0.02em;
  color: var(--mist);
}

.page-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 3.9vw, 3.6rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.015em;
  color: var(--mist);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.1vw, 2rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.lede {
  max-width: 62ch;
  font-size: clamp(15px, 1.3vw, 17.5px);
  line-height: 1.85;
  color: rgba(232, 241, 242, 0.8);
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.annotation {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--slate);
}
.annotation--rotate {
  writing-mode: vertical-rl;
  letter-spacing: 0.3em;
  transform: rotate(180deg);
}

.rule {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, rgba(56, 242, 208, 0.5), rgba(56, 242, 208, 0.05));
}

/* ---------- 9. 索引 / 标签 / 卡片 ---------- */
.chip-row { display: flex; flex-wrap: wrap; gap: 10px; }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 16px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(143, 166, 178, 0.32);
  background: rgba(11, 42, 51, 0.6);
  font-size: 13px;
  font-weight: 500;
  color: rgba(232, 241, 242, 0.84);
  transition:
    background var(--t-fast) var(--ease),
    border-color var(--t-fast) var(--ease),
    color var(--t-fast) var(--ease);
}
.chip:hover { border-color: rgba(56, 242, 208, 0.5); color: var(--mist); }
.chip.is-active,
.chip[aria-pressed="true"] {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink-900);
  font-weight: 700;
}
.chip-count {
  font-family: var(--font-mono);
  font-size: 10.5px;
  opacity: 0.82;
}

.tag {
  display: inline-block;
  padding: 4px 11px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(242, 200, 121, 0.38);
  background: var(--gold-soft);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.card {
  position: relative;
  padding: clamp(20px, 2.4vw, 32px);
  border-radius: var(--r-lg);
  border: 1px solid rgba(56, 242, 208, 0.18);
  background: linear-gradient(165deg, rgba(11, 42, 51, 0.92), rgba(6, 19, 31, 0.92));
  transition:
    transform var(--t-mid) var(--ease),
    border-color var(--t-mid) var(--ease),
    box-shadow var(--t-mid) var(--ease);
}
.card:hover {
  transform: translateY(-3px);
  border-color: rgba(56, 242, 208, 0.45);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.38);
}
.card--wine {
  background: linear-gradient(165deg, rgba(74, 16, 36, 0.92), rgba(27, 23, 64, 0.9));
  border-color: rgba(242, 200, 121, 0.26);
}
.card--violet {
  background: linear-gradient(165deg, rgba(27, 23, 64, 0.94), rgba(6, 19, 31, 0.94));
  border-color: rgba(56, 242, 208, 0.2);
}

.grid { display: grid; gap: var(--gap); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

/* ---------- 10. 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 22px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--slate);
}
.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 10px;
}
.breadcrumb-item { display: inline-flex; align-items: center; gap: 10px; }
.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  color: rgba(56, 242, 208, 0.5);
}
.breadcrumb-link { color: rgba(232, 241, 242, 0.74); }
.breadcrumb-link:hover { color: var(--cyan); }
.breadcrumb-current { color: var(--gold); }

/* ---------- 11. 图片容器基础规则 ---------- */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: var(--r-lg);
  border: 1px solid rgba(56, 242, 208, 0.2);
  background:
    radial-gradient(120% 100% at 15% 0%, rgba(56, 242, 208, 0.16), transparent 60%),
    linear-gradient(150deg, #0B2A33 0%, #1B1740 55%, #06131F 100%);
  aspect-ratio: 16 / 10;
  isolation: isolate;
}
.media-frame img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background: linear-gradient(180deg, transparent 54%, rgba(6, 19, 31, 0.62) 100%);
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--bare { border-radius: var(--r-md); border-color: rgba(143, 166, 178, 0.2); }

/* ---------- 12. 数据小件 ---------- */
.stat { display: flex; flex-direction: column; gap: 4px; }
.stat-value {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--gold);
}
.stat-label {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--slate);
}

/* ---------- 13. 断点 ---------- */
@media (max-width: 1279px) {
  :root { --rail-a: 84px; --rail-b: 206px; }
}

@media (max-width: 1023px) {
  .site-header {
    top: 0;
    bottom: auto;
    left: 0;
    right: 0;
    width: 100%;
    height: var(--bar-h);
    z-index: 80;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    padding: 0 16px;
    background: linear-gradient(180deg, rgba(6, 19, 31, 0.98), rgba(6, 19, 31, 0.94));
    border-bottom: 1px solid rgba(56, 242, 208, 0.2);
  }

  .header-rail {
    flex: 0 1 auto;
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    gap: 10px;
    padding: 0;
    background: none;
    border-right: 0;
  }
  .header-rail::before { display: none; }

  .brand-block { flex-direction: row; align-items: center; gap: 0; }
  .brand { flex-direction: row; align-items: center; gap: 10px; }
  .brand-mark { width: 36px; height: 36px; border-radius: 12px; font-size: 17px; }
  .brand-name {
    writing-mode: horizontal-tb;
    text-orientation: mixed;
    font-size: 15px;
    letter-spacing: 0.06em;
  }
  .brand-rotate,
  .rail-count,
  .rail-meter { display: none; }

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

  .site-nav {
    position: fixed;
    top: var(--bar-h);
    left: 0;
    right: 0;
    bottom: 0;
    width: auto;
    padding: 26px 20px 40px;
    border-right: 0;
    border-top: 1px solid rgba(56, 242, 208, 0.14);
    background: linear-gradient(180deg, #0A2029 0%, #06131F 100%);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition:
      opacity var(--t-mid) var(--ease),
      transform var(--t-mid) var(--ease),
      visibility var(--t-mid) var(--ease);
  }
  .site-header[data-open] .site-nav {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-kicker { margin-bottom: 14px; }
  .nav-link { padding: 14px 14px; font-size: 16px; border-radius: 16px; }
  .nav-link:hover { transform: none; }
  .nav-foot { margin-top: 30px; }

  .footer-top { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 720px) {
  .display-title { letter-spacing: -0.015em; }
  .footer-grid { gap: 24px 18px; }
}

@media (max-width: 560px) {
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .btn { padding: 12px 22px; font-size: 14px; }
}

/* ---------- 14. 动效降级 ---------- */
@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;
  }

  .rail-meter-fill { transition: none; }
  .brand:hover .brand-mark { transform: none; }
  .card:hover { transform: none; }
  .nav-link:hover { transform: none; }
}