/* =========================================================
   云顶会馆 · 共享样式 /assets/site.css
   双层头 + 粗野档案卡 + 等宽记录体
   ========================================================= */

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

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

:root {
  /* 品牌色 */
  --ink-night: #070B1A;
  --ink-deep: #0D1730;
  --ink-cloud: #16244A;
  --gold: #E8C36A;
  --gold-soft: #F4DFA6;
  --cyan: #47E0D0;
  --amber: #FF9A4D;
  --wine: #7A2E3F;
  --paper: #F1EEE6;
  --mist: #9FAAC4;

  /* 字体 */
  --font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", STSong, "SimSun", serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* 版式量 */
  --gutter: clamp(16px, 4vw, 56px);
  --maxw: 1420px;
  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);

  /* 边框与阴影 */
  --line: 1px solid rgba(159, 170, 196, 0.24);
  --shadow-hard: 6px 6px 0 0 rgba(7, 11, 26, 0.78);
  --shadow-lift: 0 22px 48px -30px rgba(0, 0, 0, 0.95);
}

body {
  margin: 0;
  background: var(--ink-night);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(78% 52% at 10% -8%, rgba(71, 224, 208, 0.10), transparent 62%),
    radial-gradient(62% 46% at 94% 3%, rgba(232, 195, 106, 0.08), transparent 66%);
}

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

/* ---------- 基础元素 ---------- */

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 0.6em;
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.24;
  letter-spacing: 0.02em;
  color: var(--paper);
}

h1 { font-size: clamp(2.2rem, 5.4vw, 4rem); }
h2 { font-size: clamp(1.6rem, 3.2vw, 2.5rem); }
h3 { font-size: clamp(1.2rem, 2.1vw, 1.55rem); }
h4 { font-size: clamp(1.02rem, 1.6vw, 1.2rem); }

p { margin: 0 0 1em; }

a { color: var(--cyan); }

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

ul, ol { margin: 0 0 1em; padding-left: 1.3em; }

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

.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.06em;
}

/* ---------- 跳转链接 ---------- */

.skip-link {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 400;
  padding: 14px 22px;
  background: var(--cyan);
  color: var(--ink-night);
  font-weight: 700;
  font-size: 0.9375rem;
  text-decoration: none;
  border: 2px solid var(--ink-night);
  transform: translateY(-140%);
  transition: transform 0.2s var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
  outline: 3px solid var(--gold);
  outline-offset: 2px;
}

/* =========================================================
   页头
   ========================================================= */

.site-header {
  position: relative;
  z-index: 60;
  background: var(--ink-night);
}

/* --- 上层：品牌说明 + 客服带 --- */

.header-top {
  background: var(--ink-deep);
  border-bottom: 1px solid rgba(232, 195, 106, 0.24);
  color: var(--mist);
  font-size: 0.8125rem;
  letter-spacing: 0.05em;
}

.header-top__inner {
  width: min(var(--maxw), 100% - 2 * var(--gutter));
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px 28px;
  min-height: 40px;
  padding-block: 7px;
}

.header-statement {
  margin: 0;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--gold-soft);
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.header-statement::before {
  content: "";
  flex: none;
  width: 7px;
  height: 7px;
  background: var(--cyan);
  transform: rotate(45deg);
  box-shadow: 0 0 0 3px rgba(71, 224, 208, 0.16);
}

.header-utility {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 8px 20px;
  flex-wrap: wrap;
  justify-content: flex-end;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
}

.header-utility__item {
  white-space: nowrap;
  color: var(--mist);
}

.header-utility__item .num {
  color: var(--gold);
}

.header-utility__item--site {
  color: var(--gold);
  position: relative;
  padding-right: 20px;
}

.header-utility__item--site::after {
  content: "";
  position: absolute;
  right: 0;
  top: 50%;
  width: 1px;
  height: 12px;
  background: rgba(159, 170, 196, 0.42);
  transform: translateY(-50%);
}

/* --- 下层：吸顶主栏 --- */

.header-main {
  position: sticky;
  top: 0;
  z-index: 60;
  background: var(--ink-night);
  border-bottom: 3px solid var(--gold);
  box-shadow: 0 18px 34px -28px rgba(0, 0, 0, 0.95);
}

.header-main__inner {
  width: min(var(--maxw), 100% - 2 * var(--gutter));
  margin-inline: auto;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: clamp(14px, 2.4vw, 38px);
  min-height: 80px;
  padding-block: 12px;
}

/* 匾额 */

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--paper);
}

.brand-mark__glyph {
  width: 40px;
  height: 40px;
  flex: none;
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.1rem;
  line-height: 1;
  color: var(--ink-night);
  background: linear-gradient(170deg, var(--gold-soft) 0%, var(--gold) 55%, #b8912f 100%);
  border: 2px solid var(--gold-soft);
  box-shadow: 4px 4px 0 0 rgba(71, 224, 208, 0.4);
  transition: box-shadow 0.2s var(--ease), transform 0.2s var(--ease);
}

.brand-mark:hover .brand-mark__glyph {
  transform: translate(-1px, -1px);
  box-shadow: 6px 6px 0 0 rgba(71, 224, 208, 0.6);
}

.brand-mark__text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand-mark__name {
  font-family: var(--font-display);
  font-size: 1.32rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  line-height: 1.15;
  color: var(--paper);
}

.brand-mark__kicker {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.26em;
  color: var(--mist);
  line-height: 1;
}

/* 主栏目 */

.primary-nav {
  justify-self: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(4px, 1.4vw, 26px);
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-list__item {
  position: relative;
}

.nav-list__link {
  position: relative;
  display: block;
  padding: 12px 2px;
  color: var(--paper);
  font-size: 0.9375rem;
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: 0.03em;
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.nav-list__link:hover {
  color: var(--gold-soft);
  border-bottom-color: rgba(232, 195, 106, 0.6);
}

.nav-list__link[aria-current="page"] {
  color: var(--gold);
  border-bottom-color: var(--gold);
  font-weight: 700;
}

.nav-list__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -8px;
  width: 5px;
  height: 5px;
  background: var(--cyan);
  transform: translateX(-50%) rotate(45deg);
}

/* 右侧操作区 */

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.3;
  text-decoration: none;
  white-space: nowrap;
  color: var(--ink-night);
  background: var(--gold);
  border: 2px solid var(--gold-soft);
  box-shadow: 4px 4px 0 0 rgba(71, 224, 208, 0.55);
  transition: transform 0.18s var(--ease), box-shadow 0.18s var(--ease);
}

.header-cta:hover {
  transform: translate(-2px, -2px);
  box-shadow: 7px 7px 0 0 rgba(71, 224, 208, 0.8);
}

.header-cta:active {
  transform: translate(0, 0);
  box-shadow: 2px 2px 0 0 rgba(71, 224, 208, 0.55);
}

/* 移动导航按钮 */

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 10px 12px;
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--paper);
  background: var(--ink-cloud);
  border: 2px solid rgba(232, 195, 106, 0.45);
  cursor: pointer;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease);
}

.nav-toggle:hover {
  color: var(--gold-soft);
  border-color: var(--gold);
}

.nav-toggle__bars {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 18px;
  height: 14px;
}

.nav-toggle__bars span {
  display: block;
  height: 2px;
  width: 100%;
  background: currentColor;
  transition: transform 0.22s var(--ease), opacity 0.22s var(--ease);
}

.site-header[data-open] .nav-toggle__bars span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.site-header[data-open] .nav-toggle__bars span:nth-child(2) {
  opacity: 0;
}

.site-header[data-open] .nav-toggle__bars span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.nav-toggle__label {
  line-height: 1;
}

/* =========================================================
   页脚
   ========================================================= */

.site-footer {
  position: relative;
  z-index: 1;
  margin-top: clamp(48px, 8vw, 110px);
  background: var(--ink-deep);
  border-top: 3px solid var(--gold);
  box-shadow: inset 0 1px 0 rgba(71, 224, 208, 0.42);
  color: var(--paper);
}

.footer-ridge {
  height: 10px;
  background:
    repeating-linear-gradient(90deg, rgba(232, 195, 106, 0.55) 0 2px, transparent 2px 16px),
    linear-gradient(180deg, rgba(71, 224, 208, 0.16), transparent);
}

.footer-main {
  width: min(var(--maxw), 100% - 2 * var(--gutter));
  margin-inline: auto;
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1.1fr) minmax(0, 0.75fr);
  gap: clamp(28px, 5vw, 72px);
  padding-block: clamp(38px, 5.5vw, 72px) clamp(30px, 4vw, 56px);
}

.footer-brand__mark {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  font-weight: 900;
  letter-spacing: 0.12em;
  line-height: 1.2;
  color: var(--gold);
  text-shadow: 3px 3px 0 rgba(7, 11, 26, 0.9);
}

.footer-tagline {
  margin: 0;
  max-width: 20em;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--mist);
  border-left: 2px solid rgba(232, 195, 106, 0.5);
  padding-left: 14px;
}

.footer-contact__title,
.footer-links__title {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.26em;
  color: var(--gold-soft);
  text-transform: uppercase;
}

.footer-contact__line {
  margin: 0 0 9px;
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--mist);
  word-break: break-word;
}

.footer-contact__line .num {
  color: var(--paper);
  font-size: 0.8125rem;
}

.footer-links__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.footer-links__item { margin: 0; }

.footer-links__link {
  display: inline-block;
  padding: 7px 0;
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--paper);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.footer-links__link:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.footer-baseline {
  border-top: 1px solid rgba(159, 170, 196, 0.18);
  background: rgba(7, 11, 26, 0.62);
}

.footer-baseline__inner {
  width: min(var(--maxw), 100% - 2 * var(--gutter));
  margin-inline: auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 28px;
  padding-block: 18px 26px;
  font-size: 0.8125rem;
  color: var(--mist);
}

.footer-icp {
  margin: 0;
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  color: var(--gold-soft);
}

.footer-note {
  margin: 0;
  color: var(--mist);
}

.footer-year {
  margin: 0;
  color: var(--mist);
}

.footer-year .num { color: var(--paper); }

/* =========================================================
   通用组件
   ========================================================= */

.wrap {
  width: min(var(--maxw), 100% - 2 * var(--gutter));
  margin-inline: auto;
}

/* 按钮 */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 26px;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.06em;
  text-decoration: none;
  color: var(--gold);
  background: transparent;
  border: 2px solid var(--gold);
  cursor: pointer;
  transition: transform 0.18s var(--ease), box-shadow 0.18s var(--ease),
              background-color 0.18s var(--ease), color 0.18s var(--ease),
              border-color 0.18s var(--ease);
}

.btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 0 rgba(22, 36, 74, 0.95);
}

.btn:active {
  transform: translate(0, 0);
  box-shadow: none;
}

.btn--primary {
  color: var(--ink-night);
  background: var(--gold);
  border-color: var(--gold-soft);
  box-shadow: 5px 5px 0 0 rgba(71, 224, 208, 0.55);
}

.btn--primary:hover {
  box-shadow: 9px 9px 0 0 rgba(71, 224, 208, 0.78);
}

.btn--ghost {
  color: var(--paper);
  border-color: rgba(159, 170, 196, 0.55);
}

.btn--ghost:hover {
  color: var(--cyan);
  border-color: var(--cyan);
  box-shadow: 6px 6px 0 0 rgba(71, 224, 208, 0.22);
}

/* 面包屑 */

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 clamp(20px, 3vw, 34px);
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.breadcrumbs__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0;
}

.breadcrumbs__link {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.breadcrumbs__link:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.breadcrumbs__sep {
  color: rgba(159, 170, 196, 0.48);
}

.breadcrumbs__current {
  color: var(--gold-soft);
}

/* 正文容器 */

.prose {
  max-width: 42em;
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--paper);
}

.prose > *:first-child { margin-top: 0; }

.prose p { margin: 0 0 1.15em; }

.prose h2 {
  margin: 2em 0 0.6em;
  font-size: clamp(1.4rem, 2.6vw, 2rem);
  padding-left: 16px;
  border-left: 4px solid var(--gold);
}

.prose h3 {
  margin: 1.7em 0 0.5em;
  font-size: clamp(1.1rem, 1.9vw, 1.3rem);
  color: var(--gold-soft);
}

.prose a {
  color: var(--cyan);
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.prose a:hover { text-underline-offset: 6px; }

.prose ul,
.prose ol { margin: 0 0 1.2em; padding-left: 1.4em; }

.prose li { margin-bottom: 0.4em; }

.prose strong { color: var(--gold-soft); font-weight: 700; }

.prose blockquote {
  margin: 1.6em 0;
  padding: 16px 22px;
  border-left: 4px solid var(--cyan);
  background: rgba(22, 36, 74, 0.62);
  color: var(--mist);
}

.prose code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  color: var(--amber);
  background: rgba(22, 36, 74, 0.8);
  padding: 1px 6px;
}

/* 网格 */

.grid {
  display: grid;
  gap: clamp(18px, 2.6vw, 34px);
}

.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--split { grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr); }

/* 面板 / 档案卡 */

.panel {
  position: relative;
  padding: clamp(20px, 3vw, 34px);
  background: var(--ink-deep);
  border: 2px solid var(--ink-cloud);
  box-shadow: var(--shadow-hard);
}

.panel--gold {
  border-color: rgba(232, 195, 106, 0.6);
  box-shadow: 6px 6px 0 0 rgba(232, 195, 106, 0.2), var(--shadow-lift);
}

.panel--cyan {
  border-color: rgba(71, 224, 208, 0.45);
  box-shadow: 6px 6px 0 0 rgba(71, 224, 208, 0.16);
}

.panel--wine {
  background: linear-gradient(170deg, rgba(122, 46, 63, 0.9), rgba(122, 46, 63, 0.5));
  border-color: rgba(244, 223, 166, 0.4);
  color: var(--gold-soft);
}

.panel--wine h2,
.panel--wine h3,
.panel--wine h4 { color: var(--gold-soft); }

/* 章节标签 */

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--gold);
}

.section-label::before {
  content: "";
  flex: none;
  width: 8px;
  height: 8px;
  background: var(--cyan);
  transform: rotate(45deg);
}

/* 纵向注释 */

.vertical-note {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.3em;
  line-height: 1.2;
  color: var(--mist);
}

/* 状态标签 */

.tag {
  display: inline-block;
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  line-height: 1.6;
  color: var(--cyan);
  background: rgba(71, 224, 208, 0.08);
  border: 1px solid rgba(71, 224, 208, 0.45);
}

.tag--amber {
  color: var(--amber);
  background: rgba(255, 154, 77, 0.1);
  border-color: rgba(255, 154, 77, 0.5);
}

.tag--wine {
  color: var(--gold-soft);
  background: rgba(122, 46, 63, 0.55);
  border-color: rgba(244, 223, 166, 0.42);
}

/* 图片容器基础（页面阶段放置真实图片） */

.img-frame {
  position: relative;
  display: block;
  overflow: hidden;
  margin: 0;
  aspect-ratio: 16 / 9;
  background:
    radial-gradient(120% 92% at 20% 0%, rgba(71, 224, 208, 0.16), transparent 62%),
    linear-gradient(165deg, var(--ink-cloud) 0%, var(--ink-night) 100%);
  border: 2px solid rgba(232, 195, 106, 0.35);
  box-shadow: 8px 8px 0 0 rgba(7, 11, 26, 0.72);
}

.img-frame > img,
.img-frame > picture > img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.img-frame--wide { aspect-ratio: 21 / 9; }
.img-frame--square { aspect-ratio: 1 / 1; }
.img-frame--tall { aspect-ratio: 4 / 5; }

.img-frame__caption {
  position: absolute;
  inset: auto 0 0 0;
  margin: 0;
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  line-height: 1.5;
  color: var(--paper);
  background: linear-gradient(180deg, transparent, rgba(7, 11, 26, 0.9));
}

/* 滚动显现协议 */

[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
}

[data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* 顶部滚动进度条（JS 注入） */

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 300;
  width: 100%;
  height: 3px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan) 0%, var(--gold) 100%);
  pointer-events: none;
}

/* =========================================================
   响应式
   ========================================================= */

@media (max-width: 1180px) {
  .nav-list { gap: 6px 14px; }
  .nav-list__link { font-size: 0.875rem; }
  .header-cta { padding: 10px 15px; font-size: 0.8125rem; }
}

@media (max-width: 1040px) {
  .header-utility__item--site { display: none; }
  .header-utility__item--site::after { display: none; }
}

@media (max-width: 980px) {
  .header-main__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    min-height: 68px;
    padding-block: 10px;
  }

  .brand-mark { justify-self: start; }

  .primary-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    justify-self: stretch;
    padding: 10px var(--gutter) 22px;
    background: var(--ink-deep);
    border-top: 1px solid rgba(232, 195, 106, 0.28);
    border-bottom: 3px solid var(--gold);
    box-shadow: 0 28px 44px -28px rgba(0, 0, 0, 0.95);
    max-height: 72vh;
    overflow-y: auto;
  }

  .site-header[data-open] .primary-nav { display: block; }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav-list__item {
    border-bottom: 1px solid rgba(159, 170, 196, 0.16);
  }

  .nav-list__item:last-child { border-bottom: 0; }

  .nav-list__link {
    padding: 15px 2px;
    font-size: 1rem;
    border-bottom: 0;
  }

  .nav-list__link[aria-current="page"] {
    border-bottom-color: transparent;
  }

  .nav-list__link[aria-current="page"]::after {
    left: auto;
    right: 6px;
    bottom: 50%;
    transform: translateY(50%) rotate(45deg);
  }

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

  .footer-main {
    grid-template-columns: minmax(0, 1fr);
    gap: 34px;
  }

  .grid--2,
  .grid--3,
  .grid--split {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 640px) {
  body { font-size: 16px; }

  .header-top__inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding-block: 8px;
  }

  .header-statement {
    font-size: 0.75rem;
    white-space: normal;
  }

  .header-utility {
    justify-content: flex-start;
    font-size: 0.7rem;
    gap: 4px 14px;
  }

  .brand-mark__glyph {
    width: 34px;
    height: 34px;
    font-size: 0.95rem;
    box-shadow: 3px 3px 0 0 rgba(71, 224, 208, 0.4);
  }

  .brand-mark__name { font-size: 1.1rem; }

  .header-cta {
    padding: 9px 12px;
    font-size: 0.75rem;
    box-shadow: 3px 3px 0 0 rgba(71, 224, 208, 0.55);
  }

  .nav-toggle__label { display: none; }

  .footer-baseline__inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .img-frame { box-shadow: 5px 5px 0 0 rgba(7, 11, 26, 0.72); }
}

@media (max-width: 400px) {
  .brand-mark__kicker { display: none; }
  .header-cta { display: none; }
}

/* =========================================================
   动效偏好
   ========================================================= */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }

  .scroll-progress { transition: none !important; }
}