/* =========================================================
   /assets/site.css — 皇冠游戏 · 共享外壳与基础组件
   层级：reset → 变量 → 中文排版 → 头部 → 页脚 → 通用组件
   ========================================================= */

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  background-color: #101B30;
}
img, svg, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
ol, ul { list-style: none; padding: 0; }
table { border-collapse: collapse; }

:root {
  --navy: #1A2A47;
  --navy-deep: #101B30;
  --navy-mid: #16243C;
  --gold: #D4AF37;
  --cyan: #00E5FF;
  --coral: #FF6B6B;
  --rock: #2C3444;
  --moss: #5C7C5A;
  --clay: #C0714B;
  --cloud: #8A94A6;
  --ink: #F2EDE4;

  --line: rgba(242, 237, 228, 0.13);
  --line-gold: rgba(212, 175, 55, 0.42);
  --line-soft: rgba(242, 237, 228, 0.07);

  --card-r: 24px;
  --panel-r: 32px;

  --rail-l: 220px;
  --rail-r: clamp(184px, 15vw, 212px);

  --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "Noto Sans Mono", "SFMono-Regular", ui-monospace, Menlo, Consolas, monospace;

  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
}

/* ---------- 中文排版 ---------- */
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  letter-spacing: 0.01em;
  color: var(--ink);
  min-height: 100vh;
  padding-left: var(--rail-l);
  padding-right: var(--rail-r);
  background-color: #14203A;
  background-image:
    linear-gradient(to right, rgba(242, 237, 228, 0.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(242, 237, 228, 0.045) 1px, transparent 1px),
    radial-gradient(1200px 760px at 84% -10%, rgba(212, 175, 55, 0.16), transparent 62%),
    radial-gradient(900px 620px at 2% 100%, rgba(0, 229, 255, 0.10), transparent 62%),
    linear-gradient(165deg, #1A2A47 0%, #15223B 44%, #101B30 100%);
  background-size: 64px 64px, 64px 64px, auto, auto, auto;
  background-repeat: repeat, repeat, no-repeat, no-repeat, no-repeat;
}

h1, h2, h3, h4 {
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--ink);
}
h1 { font-size: clamp(44px, 7.2vw, 104px); line-height: 0.95; }
h2 { font-size: clamp(28px, 3.6vw, 44px); line-height: 1.1; }
h3 { font-size: clamp(20px, 2.1vw, 26px); line-height: 1.28; font-weight: 800; letter-spacing: -0.01em; }
h4 { font-size: 17px; line-height: 1.4; font-weight: 800; }

p { line-height: 1.8; }

.mono {
  font-family: var(--font-mono);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- skip link ---------- */
.skip-link {
  position: fixed;
  left: 50%;
  top: 10px;
  z-index: 300;
  transform: translate(-50%, -180%);
  padding: 10px 20px;
  border-radius: 999px;
  background: var(--gold);
  color: #101B30;
  font-size: 14px;
  font-weight: 800;
  transition: transform 0.18s var(--ease);
}
.skip-link:focus { transform: translate(-50%, 0); }

/* =========================================================
   头部：左右分置固定导轨
   ========================================================= */
.site-header {
  position: fixed;
  inset: 0;
  z-index: 50;
  pointer-events: none;
}
.site-header > * { pointer-events: auto; }

/* 顶部滚动进度 */
.scroll-progress {
  position: fixed;
  left: 0; right: 0; top: 0;
  height: 3px;
  z-index: 220;
  background: rgba(242, 237, 228, 0.07);
  pointer-events: none;
}
.scroll-progress__bar {
  display: block;
  height: 100%;
  width: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--gold), var(--cyan));
  transition: transform 0.12s linear;
}

/* 左侧品牌锁定区 */
.brand-rail {
  position: fixed;
  left: 0; top: 0; bottom: 0;
  width: var(--rail-l);
  z-index: 60;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  gap: 22px;
  padding: 48px 26px;
  overflow: hidden;
  background: linear-gradient(180deg, #0E1729 0%, #16243C 58%, #101B30 100%);
  border-right: 1px solid var(--line-soft);
}
.brand-rail::before {
  content: "";
  position: absolute;
  left: -130px;
  bottom: -140px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  border: 1px solid rgba(212, 175, 55, 0.20);
  box-shadow:
    0 0 0 40px rgba(212, 175, 55, 0.05),
    0 0 0 86px rgba(0, 229, 255, 0.04);
  pointer-events: none;
}

.brand {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
}
.brand-rule {
  display: block;
  width: 30px;
  height: 3px;
  border-radius: 2px;
  background: var(--gold);
  margin-bottom: 10px;
}
.brand-name {
  font-size: 22px;
  font-weight: 900;
  letter-spacing: -0.01em;
  line-height: 1.2;
  color: var(--ink);
}
.brand-sub {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.22em;
  color: var(--gold);
}
.brand-tagline {
  position: relative;
  z-index: 1;
  font-size: 13px;
  line-height: 1.7;
  color: var(--cloud);
  max-width: 9em;
}
.brand-domain {
  display: none;
  position: relative;
  z-index: 1;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--cloud);
  word-break: break-all;
  line-height: 1.5;
}

.site-header.is-condensed .brand-name,
.site-header.is-condensed .brand-sub,
.site-header.is-condensed .brand-tagline { display: none; }
.site-header.is-condensed .brand-domain { display: block; }
.site-header.is-condensed .brand-rule { margin-bottom: 4px; }

/* 移动端菜单按钮（桌面隐藏） */
.nav-toggle { display: none; }
.nav-toggle__label { letter-spacing: 0.08em; }
.nav-toggle__bars {
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 16px;
}
.nav-toggle__bars i {
  display: block;
  height: 2px;
  width: 100%;
  border-radius: 2px;
  background: var(--gold);
  transition: transform 0.2s var(--ease);
}

/* 遮罩（桌面隐藏） */
.nav-scrim { display: none; }

/* 右侧竖排目录 */
.site-nav {
  position: fixed;
  right: 0; top: 0; bottom: 0;
  width: var(--rail-r);
  z-index: 70;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-end;
  gap: 14px;
  padding: 80px 24px;
  background: linear-gradient(270deg, rgba(16, 27, 48, 0.62), rgba(16, 27, 48, 0));
}
.site-nav__title {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.26em;
  color: var(--cloud);
  margin-bottom: 8px;
}
.nav-list {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
  width: 100%;
}
.nav-item { width: 100%; text-align: right; }
.nav-link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  justify-content: flex-end;
  gap: 9px;
  padding: 9px 0;
  font-size: 14px;
  font-weight: 500;
  line-height: 1.4;
  color: rgba(242, 237, 228, 0.74);
  white-space: nowrap;
  transition: color 0.16s var(--ease);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0; right: 0;
  bottom: 4px;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.16s var(--ease);
}
.nav-link:hover { color: var(--ink); }
.nav-link:hover::after { transform: scaleX(1); }
.nav-num {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: rgba(212, 175, 55, 0.62);
}
.nav-text { display: inline-block; }
.nav-link[aria-current="page"] { color: var(--gold); font-weight: 700; }
.nav-link[aria-current="page"]::after { transform: scaleX(1); background: var(--cyan); }
.nav-link[aria-current="page"] .nav-num { color: var(--cyan); }

/* 礼包码悬浮胶囊 */
.nav-gift {
  position: fixed;
  right: 24px;
  bottom: 30px;
  z-index: 80;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 24px;
  border-radius: 999px;
  background: linear-gradient(135deg, #E0BE4A 0%, #C09B28 100%);
  color: #101B30;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.04em;
  line-height: 1;
  box-shadow: 0 14px 34px rgba(212, 175, 55, 0.24);
  transition: transform 0.18s var(--ease), box-shadow 0.18s var(--ease);
}
.nav-gift:hover {
  transform: translateY(-3px);
  box-shadow: 0 20px 46px rgba(212, 175, 55, 0.36);
}
.nav-gift__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #B03B3B;
  animation: giftBreath 2.4s ease-in-out infinite;
}
@keyframes giftBreath {
  0%, 100% { opacity: 0.45; transform: scale(0.82); }
  50% { opacity: 1; transform: scale(1.14); }
}

/* =========================================================
   页脚
   ========================================================= */
.site-footer {
  position: relative;
  margin-top: 104px;
  overflow: hidden;
  border-top: 1px solid rgba(212, 175, 55, 0.28);
  background: linear-gradient(180deg, rgba(16, 27, 48, 0) 0%, rgba(11, 20, 36, 0.88) 22%, #0A1322 100%);
}
.site-footer::before {
  content: "";
  position: absolute;
  right: -180px;
  top: -180px;
  width: 440px;
  height: 440px;
  border-radius: 50%;
  border: 1px solid rgba(0, 229, 255, 0.14);
  box-shadow:
    0 0 0 56px rgba(212, 175, 55, 0.05),
    0 0 0 118px rgba(0, 229, 255, 0.03);
  pointer-events: none;
}
.footer-inner {
  position: relative;
  max-width: 1120px;
  margin: 0 auto;
  padding: 68px 32px 44px;
  display: grid;
  grid-template-columns: 1.05fr 1.5fr 1fr;
  gap: 48px 40px;
}
.footer-kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--gold);
  margin-bottom: 14px;
}
.footer-wordmark {
  font-size: clamp(34px, 4.6vw, 56px);
  font-weight: 900;
  line-height: 0.95;
  letter-spacing: -0.02em;
  color: var(--gold);
}
@supports (-webkit-text-stroke: 1px #000) {
  .footer-wordmark {
    color: transparent;
    -webkit-text-stroke: 1.5px rgba(212, 175, 55, 0.9);
  }
}
.footer-domain {
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--cloud);
  word-break: break-all;
}
.footer-icp {
  margin-top: 8px;
  font-size: 12px;
  color: rgba(138, 148, 166, 0.82);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px 20px;
}
.footer-col__title {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--ink);
  padding-bottom: 10px;
  margin-bottom: 12px;
  border-bottom: 1px solid rgba(242, 237, 228, 0.12);
}
.footer-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.footer-link {
  position: relative;
  display: inline-block;
  font-size: 14px;
  line-height: 1.6;
  color: rgba(242, 237, 228, 0.72);
  transition: color 0.16s var(--ease);
}
.footer-link::after {
  content: "";
  position: absolute;
  left: 0; right: 0;
  bottom: 1px;
  height: 1px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.16s var(--ease);
}
.footer-link:hover { color: var(--ink); }
.footer-link:hover::after { transform: scaleX(1); }

.footer-contact__title {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.06em;
  padding-bottom: 10px;
  margin-bottom: 12px;
  border-bottom: 1px solid rgba(242, 237, 228, 0.12);
}
.footer-contact__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 10px;
  padding: 7px 0;
  border-bottom: 1px dashed rgba(242, 237, 228, 0.08);
}
.footer-contact__label {
  flex: 0 0 auto;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--cloud);
}
.footer-contact__value {
  flex: 1 1 140px;
  min-width: 0;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(242, 237, 228, 0.86);
  overflow-wrap: anywhere;
}
.footer-contact__note {
  margin-top: 14px;
  font-size: 12px;
  line-height: 1.7;
  color: rgba(138, 148, 166, 0.9);
}

.copy-btn {
  flex: 0 0 auto;
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid rgba(212, 175, 55, 0.45);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--gold);
  transition: background-color 0.16s var(--ease), color 0.16s var(--ease), border-color 0.16s var(--ease);
}
.copy-btn:hover {
  background: rgba(212, 175, 55, 0.16);
  border-color: var(--gold);
}
.copy-btn.is-done {
  color: #101B30;
  background: var(--gold);
  border-color: var(--gold);
}

.footer-legal {
  position: relative;
  max-width: 1120px;
  margin: 0 auto;
  padding: 22px 32px 8px;
  border-top: 1px solid rgba(242, 237, 228, 0.1);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--cloud);
}
.footer-legal__line { font-family: var(--font-mono); font-weight: 600; letter-spacing: 0.02em; }
.footer-legal__note { color: rgba(138, 148, 166, 0.86); }

/* =========================================================
   通用组件（供页面阶段使用）
   ========================================================= */
.shell {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding-left: 32px;
  padding-right: 32px;
}
.section { padding: 88px 0; }
.section--tight { padding: 48px 0; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--gold);
}
.eyebrow::before {
  content: "";
  width: 28px;
  height: 3px;
  border-radius: 2px;
  background: var(--gold);
}

.section-title {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: clamp(28px, 3.6vw, 44px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
}
.section-title::before {
  content: "";
  flex: 0 0 auto;
  width: 28px;
  height: 4px;
  border-radius: 2px;
  background: var(--gold);
}

.lede {
  font-size: clamp(16px, 1.5vw, 19px);
  line-height: 1.78;
  color: rgba(242, 237, 228, 0.78);
  max-width: 34em;
}

.prose { max-width: 66ch; }
.prose p + p { margin-top: 1em; }

.divider {
  height: 1px;
  border: 0;
  margin: 56px 0;
  background: linear-gradient(90deg, transparent, rgba(212, 175, 55, 0.5), transparent);
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 26px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0.02em;
  transition: transform 0.16s var(--ease), background-color 0.16s var(--ease),
              border-color 0.16s var(--ease), color 0.16s var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn--gold { background: var(--gold); color: #101B30; }
.btn--gold:hover { background: #E4C355; }
.btn--ghost { border-color: rgba(242, 237, 228, 0.28); color: var(--ink); }
.btn--ghost:hover { border-color: var(--gold); color: var(--gold); }
.btn--small { padding: 9px 18px; font-size: 13px; }

/* 胶囊标签 */
.chip-row { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 15px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(44, 52, 68, 0.55);
  font-size: 13px;
  line-height: 1.5;
  color: rgba(242, 237, 228, 0.82);
}
.chip--gold { border-color: rgba(212, 175, 55, 0.5); color: var(--gold); background: rgba(212, 175, 55, 0.1); }
.chip--coral { border-color: rgba(255, 107, 107, 0.5); color: var(--coral); background: rgba(255, 107, 107, 0.1); }
.chip--cyan { border-color: rgba(0, 229, 255, 0.45); color: var(--cyan); background: rgba(0, 229, 255, 0.08); }

/* 卡片与面板 */
.card {
  padding: 26px;
  border-radius: var(--card-r);
  border: 1px solid var(--line);
  background: linear-gradient(160deg, rgba(44, 52, 68, 0.86), rgba(26, 36, 56, 0.94));
  transition: transform 0.18s var(--ease), border-color 0.18s var(--ease), box-shadow 0.18s var(--ease);
}
.card:hover {
  transform: translateY(-4px);
  border-color: rgba(212, 175, 55, 0.55);
  box-shadow: 0 18px 40px rgba(6, 12, 24, 0.45);
}
.panel {
  padding: clamp(24px, 3.4vw, 40px);
  border-radius: var(--panel-r);
  border: 1px solid var(--line);
  background: rgba(26, 36, 56, 0.72);
}

/* 网格 */
.grid { display: grid; gap: 24px; }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }
.grid--offset > *:nth-child(even) { margin-top: 64px; }
.span-4 { grid-column: span 4; }
.span-5 { grid-column: span 5; }
.span-7 { grid-column: span 7; }
.span-8 { grid-column: span 8; }

/* 图片占位容器 */
.media-frame {
  position: relative;
  display: flex;
  align-items: flex-end;
  aspect-ratio: 4 / 3;
  padding: 18px;
  border-radius: var(--card-r);
  border: 1px solid var(--line);
  overflow: hidden;
  background-color: #1B2942;
  background-image:
    linear-gradient(to right, rgba(242, 237, 228, 0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(242, 237, 228, 0.05) 1px, transparent 1px),
    linear-gradient(150deg, #22304C 0%, #16203A 55%, #121C31 100%);
  background-size: 32px 32px, 32px 32px, auto;
}
.media-frame::before {
  content: "";
  position: absolute;
  right: -60px;
  bottom: -60px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  border: 1px solid rgba(0, 229, 255, 0.18);
  box-shadow: 0 0 0 32px rgba(212, 175, 55, 0.05);
  pointer-events: none;
}
.media-frame img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame--wide { aspect-ratio: 16 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame__cap {
  position: relative;
  z-index: 1;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: rgba(242, 237, 228, 0.62);
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--cloud);
}
.breadcrumb a { color: rgba(242, 237, 228, 0.7); transition: color 0.16s var(--ease); }
.breadcrumb a:hover { color: var(--gold); }
.breadcrumb__sep { color: rgba(138, 148, 166, 0.55); }

/* 时间轴 */
.timeline {
  position: relative;
  display: grid;
  gap: 30px;
  padding-left: 36px;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--gold), rgba(0, 229, 255, 0.5), rgba(242, 237, 228, 0.1));
}
.timeline__item { position: relative; }
.timeline__dot {
  position: absolute;
  left: -36px;
  top: 6px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2px solid var(--gold);
  background: var(--navy-deep);
  box-shadow: 0 0 0 4px rgba(212, 175, 55, 0.12);
}
.timeline__ver {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

/* 数据 */
.stat { display: flex; flex-direction: column; gap: 6px; }
.stat__num {
  font-family: var(--font-mono);
  font-size: clamp(30px, 4vw, 46px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--gold);
}
.stat__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--cloud);
}

/* 显现 */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* =========================================================
   响应式：平板 / 手机
   ========================================================= */
@media (max-width: 1180px) {
  body { font-size: 15.5px; }
  .nav-link { font-size: 13px; }
}

@media (max-width: 999px) {
  body {
    padding-left: 0;
    padding-right: 0;
    padding-top: 72px;
    padding-bottom: 84px;
    font-size: 15px;
    background-size: 40px 40px, 40px 40px, auto, auto, auto;
  }

  .brand-rail {
    left: 0; right: 0; top: 0; bottom: auto;
    width: auto;
    height: 64px;
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    gap: 10px;
    padding: 0 86px 0 18px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    background: rgba(14, 23, 41, 0.96);
    backdrop-filter: blur(8px);
  }
  .brand-rail::before { display: none; }
  .brand { flex-direction: row; align-items: baseline; gap: 10px; }
  .brand-rule { width: 22px; height: 3px; margin-bottom: 0; }
  .brand-name { font-size: 17px; }
  .brand-sub { font-size: 10px; letter-spacing: 0.18em; }
  .brand-tagline, .brand-domain { display: none; }
  .site-header.is-condensed .brand-name { display: inline; }
  .site-header.is-condensed .brand-sub { display: inline; }
  .site-header.is-condensed .brand-domain { display: none; }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    position: fixed;
    top: 12px;
    right: 14px;
    z-index: 210;
    padding: 9px 14px;
    border-radius: 999px;
    border: 1px solid rgba(212, 175, 55, 0.42);
    background: rgba(26, 42, 71, 0.94);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.06em;
    color: var(--ink);
  }
  .site-header[data-open] .nav-toggle__bars i:first-child { transform: translateY(3px) rotate(45deg); }
  .site-header[data-open] .nav-toggle__bars i:last-child { transform: translateY(-3px) rotate(-45deg); }

  .nav-scrim {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 150;
    background: rgba(6, 11, 22, 0.64);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.24s var(--ease), visibility 0.24s var(--ease);
  }
  .site-header[data-open] .nav-scrim { opacity: 1; visibility: visible; }

  .site-nav {
    top: 0; right: 0; bottom: 0; left: auto;
    width: min(330px, 86vw);
    padding: 84px 24px 116px;
    justify-content: flex-start;
    align-items: stretch;
    gap: 10px;
    overflow-y: auto;
    background: linear-gradient(180deg, #0E1729 0%, #121E33 100%);
    border-left: 1px solid rgba(212, 175, 55, 0.24);
    transform: translateX(102%);
    transition: transform 0.28s var(--ease);
    z-index: 190;
  }
  .site-header[data-open] .site-nav { transform: none; }
  .site-nav__title { color: rgba(138, 148, 166, 0.9); }
  .nav-list { align-items: stretch; gap: 0; }
  .nav-item { text-align: left; }
  .nav-link {
    justify-content: flex-start;
    width: 100%;
    font-size: 18px;
    padding: 15px 0;
    border-bottom: 1px solid rgba(242, 237, 228, 0.08);
    color: rgba(242, 237, 228, 0.88);
  }
  .nav-link::after { display: none; }
  .nav-num { font-size: 11px; }
  .nav-link[aria-current="page"] { color: var(--gold); }

  .nav-gift {
    left: 14px;
    right: 14px;
    bottom: 14px;
    padding: 15px 20px;
    font-size: 15px;
    justify-content: center;
    transition: transform 0.18s var(--ease), box-shadow 0.18s var(--ease), opacity 0.2s var(--ease);
  }
  .site-header[data-open] .nav-gift { opacity: 0; pointer-events: none; }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 36px 28px;
    padding: 52px 20px 36px;
  }
  .footer-brand { grid-column: 1 / -1; }
  .footer-contact { grid-column: 1 / -1; }
  .footer-legal { padding: 20px 20px 8px; }

  .shell { padding-left: 20px; padding-right: 20px; }
  .section { padding: 64px 0; }
  .grid--2, .grid--3 { grid-template-columns: minmax(0, 1fr); }
  .grid--offset > *:nth-child(even) { margin-top: 0; }
  .span-4, .span-5, .span-7, .span-8 { grid-column: 1 / -1; }
  .divider { margin: 40px 0; }
  .site-footer { margin-top: 76px; }
}

@media (max-width: 619px) {
  h1 { font-size: clamp(38px, 12vw, 58px); }
  .footer-nav { grid-template-columns: 1fr 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-inner > * { grid-column: 1 / -1; }
  .grid--12 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .media-frame, .media-frame--wide, .media-frame--square { aspect-ratio: 4 / 3; }
  .timeline { padding-left: 30px; }
  .timeline__dot { left: -30px; }
  .card { padding: 20px; }
}

/* =========================================================
   减少动效
   ========================================================= */
@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;
  }
  .nav-gift__dot { opacity: 1; transform: none; }
  [data-reveal] { opacity: 1; transform: none; }
  .scroll-progress__bar { transition: none; }
}