/* =========================================================
   壹号娱乐会馆 · /assets/site.css
   共享外壳：reset / 变量 / 排版 / 头部 / 页脚 / 基础组件
   ========================================================= */

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

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

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

ul,
ol {
  padding: 0;
  list-style: none;
}

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

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

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

:root {
  --ink: #081726;
  --harbor: #0f2a47;
  --stage: #1b3e63;
  --gold: #f4b942;
  --coral: #ff6a4d;
  --celadon: #78d0b0;
  --parchment: #f4ebdd;
  --mist: #d6e2f0;
  --teal: #0d4b4f;
  --warm: #f8fbff;

  --line: rgba(214, 226, 240, 0.22);
  --line-strong: rgba(214, 226, 240, 0.42);
  --shadow-hard: 8px 8px 0 0 rgba(4, 12, 22, 0.55);
  --shadow-hard-gold: 6px 6px 0 0 rgba(244, 185, 66, 0.28);

  --grad-stage: radial-gradient(circle at 16% 10%, rgba(244, 185, 66, 0.2), transparent 46%),
    radial-gradient(circle at 86% 82%, rgba(255, 106, 77, 0.18), transparent 52%),
    linear-gradient(148deg, #081726 0%, #0f2a47 58%, #123354 100%);

  --font-display: "Alibaba PuHuiTi 3.0 115 Black", "Source Han Sans SC", "Noto Sans SC",
    "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, "SF Mono",
    Menlo, Consolas, monospace;

  --r-sm: 6px;
  --r-md: 12px;
  --r-lg: 20px;

  --gutter: clamp(1.15rem, 4vw, 2.5rem);
}

/* ---------- 基础排版 ---------- */

body {
  min-height: 100vh;
  background: var(--ink);
  color: var(--warm);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--warm);
}

p {
  overflow-wrap: break-word;
}

strong {
  color: var(--gold);
}

::selection {
  background: var(--gold);
  color: var(--ink);
}

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

#main-content {
  scroll-margin-top: 130px;
}

/* ---------- 容器与通用布局 ---------- */

.wrap {
  width: 100%;
  max-width: 1240px;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.page-main {
  display: block;
  padding-bottom: clamp(2rem, 5vw, 4rem);
}

.section {
  padding-block: clamp(2.5rem, 6vw, 5rem);
}

.section-head {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-width: 72ch;
  margin-bottom: clamp(1.5rem, 3vw, 2.25rem);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--celadon);
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 2px;
  background: var(--coral);
}

.section-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.6rem, 3.6vw, 2.6rem);
  line-height: 1.14;
  color: var(--warm);
}

.lede {
  max-width: 62ch;
  font-size: clamp(1rem, 1.5vw, 1.1rem);
  line-height: 1.8;
  color: rgba(214, 226, 240, 0.82);
}

.rule {
  height: 3px;
  margin-block: clamp(1.75rem, 4vw, 3rem);
  border: 0;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--gold), var(--coral) 46%, var(--celadon) 100%);
  opacity: 0.75;
}

.grid {
  display: grid;
  gap: clamp(1rem, 2.4vw, 1.75rem);
}

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

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

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ---------- 跳转链接 ---------- */

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 999;
  padding: 0.7rem 1.15rem;
  border-radius: var(--r-sm);
  background: var(--gold);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  box-shadow: 5px 5px 0 0 rgba(255, 106, 77, 0.55);
  transform: translateY(-180%);
  transition: transform 0.2s ease;
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
}

/* ---------- 头部：双层信息导航 ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: rgba(8, 23, 38, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.header-top {
  background: linear-gradient(90deg, var(--harbor), var(--teal) 62%, var(--harbor));
  border-bottom: 1px solid rgba(120, 208, 176, 0.28);
}

.header-top__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.15rem 1.5rem;
  min-height: 38px;
  padding-block: 0.42rem;
}

.header-top__brandline {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.header-top__meta {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--mist);
  opacity: 0.85;
}

.header-main__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.25rem;
  min-height: 74px;
  padding-block: 0.55rem;
}

.brand-lockup {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 0.7rem;
}

.brand-lockup__mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--gold);
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 900;
  line-height: 1;
  box-shadow: 4px 4px 0 0 rgba(255, 106, 77, 0.55);
}

.brand-lockup__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-lockup__name {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 900;
  letter-spacing: 0.02em;
  color: var(--warm);
}

.brand-lockup__sub {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--celadon);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.55rem;
  margin-left: auto;
  padding: 0.5rem 0.8rem;
  border: 2px solid var(--line-strong);
  border-radius: 10px;
  color: var(--warm);
  cursor: pointer;
  transition: border-color 0.18s ease, color 0.18s ease, background 0.18s ease;
}

.nav-toggle:hover {
  border-color: var(--gold);
  color: var(--gold);
  background: rgba(244, 185, 66, 0.08);
}

.nav-toggle__bars {
  display: grid;
  gap: 4px;
  width: 20px;
}

.nav-toggle__bars span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.22s ease, opacity 0.22s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.nav-toggle__label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-left: auto;
}

.primary-nav__list {
  display: flex;
  align-items: center;
  gap: 0.18rem;
}

.primary-nav__item {
  flex: 0 0 auto;
}

.primary-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 0.8rem;
  border: 1px solid transparent;
  border-radius: 8px;
  font-size: 0.92rem;
  font-weight: 600;
  white-space: nowrap;
  color: var(--mist);
  transition: color 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}

.primary-nav__link:hover {
  color: var(--warm);
  background: rgba(214, 226, 240, 0.08);
  border-color: var(--line);
}

.primary-nav__link[aria-current="page"] {
  color: var(--gold);
  background: rgba(244, 185, 66, 0.1);
  border-color: rgba(244, 185, 66, 0.45);
}

.primary-nav__link[aria-current="page"]::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold);
}

.primary-nav__item--tag .primary-nav__link {
  background: linear-gradient(135deg, var(--gold), #f0a52e);
  color: #12212f;
  font-weight: 700;
  border-color: transparent;
  box-shadow: 3px 3px 0 0 rgba(255, 106, 77, 0.5);
}

.primary-nav__item--tag .primary-nav__link:hover {
  background: linear-gradient(135deg, #ffcb63, var(--gold));
  color: #12212f;
  border-color: transparent;
}

.primary-nav__item--tag .primary-nav__link[aria-current="page"] {
  background: var(--coral);
  color: #2a0d06;
  border-color: rgba(255, 106, 77, 0.6);
  box-shadow: 3px 3px 0 0 rgba(244, 185, 66, 0.45);
}

.primary-nav__item--tag .primary-nav__link[aria-current="page"]::before {
  background: #2a0d06;
}

.primary-nav__cta {
  padding: 0.6rem 1.1rem;
  font-size: 0.85rem;
  white-space: nowrap;
}

.scroll-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  z-index: 2;
  width: 100%;
  height: 3px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--celadon), var(--gold) 55%, var(--coral));
  pointer-events: none;
}

/* ---------- 通用按钮 ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.72rem 1.35rem;
  border: 2px solid transparent;
  border-radius: 10px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-align: center;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease,
    color 0.18s ease, border-color 0.18s ease;
}

.btn--gold {
  background: var(--gold);
  color: #12212f;
  border-color: rgba(18, 33, 47, 0.2);
  box-shadow: 5px 5px 0 0 rgba(255, 106, 77, 0.45);
}

.btn--gold:hover {
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0 0 rgba(255, 106, 77, 0.55);
}

.btn--gold:active {
  transform: translate(1px, 1px);
  box-shadow: 3px 3px 0 0 rgba(255, 106, 77, 0.4);
}

.btn--coral {
  background: var(--coral);
  color: #2a0d06;
  border-color: rgba(42, 13, 6, 0.18);
  box-shadow: 5px 5px 0 0 rgba(244, 185, 66, 0.42);
}

.btn--coral:hover {
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0 0 rgba(244, 185, 66, 0.5);
}

.btn--ghost {
  background: transparent;
  color: var(--warm);
  border-color: var(--line-strong);
  box-shadow: 4px 4px 0 0 rgba(4, 12, 22, 0.5);
}

.btn--ghost:hover {
  color: var(--gold);
  border-color: var(--gold);
  transform: translate(-2px, -2px);
  box-shadow: 7px 7px 0 0 rgba(4, 12, 22, 0.55);
}

.btn--sm {
  padding: 0.5rem 0.9rem;
  font-size: 0.82rem;
  box-shadow: 4px 4px 0 0 rgba(255, 106, 77, 0.4);
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding-bottom: 0.1rem;
  border-bottom: 2px solid rgba(244, 185, 66, 0.4);
  font-weight: 700;
  color: var(--gold);
  transition: color 0.18s ease, border-color 0.18s ease;
}

.link-arrow::after {
  content: "\2192";
  font-family: var(--font-mono);
  transition: transform 0.18s ease;
}

.link-arrow:hover {
  color: var(--coral);
  border-color: var(--coral);
}

.link-arrow:hover::after {
  transform: translateX(4px);
}

/* ---------- 面包屑 ---------- */

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: rgba(214, 226, 240, 0.62);
}

.breadcrumb__link {
  color: var(--mist);
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.breadcrumb__link:hover {
  color: var(--gold);
  border-color: rgba(244, 185, 66, 0.5);
}

.breadcrumb__sep {
  color: rgba(214, 226, 240, 0.35);
}

.breadcrumb__current {
  color: var(--gold);
}

/* ---------- 档案卡 / 标签 ---------- */

.card {
  position: relative;
  padding: clamp(1.1rem, 2.4vw, 1.65rem);
  border: 2px solid var(--line);
  border-left: 4px solid var(--gold);
  border-radius: var(--r-md);
  background: linear-gradient(160deg, var(--harbor), #0b2138 80%);
  box-shadow: var(--shadow-hard);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translate(-2px, -2px);
  border-color: rgba(244, 185, 66, 0.55);
  box-shadow: 11px 11px 0 0 rgba(4, 12, 22, 0.55);
}

.card__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  margin-bottom: 0.75rem;
}

.card__title {
  font-family: var(--font-display);
  font-size: 1.18rem;
  font-weight: 800;
  line-height: 1.3;
  color: var(--warm);
}

.card__body {
  font-size: 0.95rem;
  line-height: 1.75;
  color: rgba(214, 226, 240, 0.8);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.22rem 0.6rem;
  border: 1px solid currentColor;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mist);
  white-space: nowrap;
}

.tag--gold {
  color: var(--gold);
  background: rgba(244, 185, 66, 0.12);
}

.tag--coral {
  color: var(--coral);
  background: rgba(255, 106, 77, 0.12);
}

.tag--celadon {
  color: var(--celadon);
  background: rgba(120, 208, 176, 0.12);
}

/* ---------- 图片容器基础规则 ---------- */

.media-frame {
  position: relative;
  overflow: hidden;
  border: 2px solid var(--line-strong);
  border-radius: var(--r-md);
  background: linear-gradient(155deg, var(--stage), var(--teal));
  box-shadow: var(--shadow-hard);
}

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

.media-frame--wide {
  aspect-ratio: 16 / 9;
}

.media-frame--square {
  aspect-ratio: 1 / 1;
}

.media-frame--tall {
  aspect-ratio: 4 / 5;
}

.media-frame > figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 0.75rem 1rem;
  background: linear-gradient(180deg, transparent, rgba(4, 12, 22, 0.85));
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--mist);
}

/* ---------- 横向长表 ---------- */

.table-scroll {
  position: relative;
  overflow-x: auto;
  border: 2px solid var(--line);
  border-radius: var(--r-md);
  background: rgba(15, 42, 71, 0.5);
  box-shadow: var(--shadow-hard);
  -webkit-overflow-scrolling: touch;
}

.data-table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.data-table caption {
  padding: 0.9rem 1rem;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--celadon);
}

.data-table th,
.data-table td {
  padding: 0.85rem 1rem;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid rgba(214, 226, 240, 0.14);
}

.data-table thead th {
  position: sticky;
  top: 0;
  z-index: 1;
  background: var(--stage);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
}

.data-table tbody tr {
  transition: background 0.16s ease;
}

.data-table tbody tr:hover {
  background: rgba(244, 185, 66, 0.08);
}

.data-table tbody tr:last-child th,
.data-table tbody tr:last-child td {
  border-bottom: 0;
}

.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--coral);
}

/* ---------- 页脚 ---------- */

.site-footer {
  position: relative;
  margin-top: clamp(3rem, 7vw, 6rem);
  border-top: 3px solid var(--gold);
  background: linear-gradient(160deg, #0f2a47 0%, #0d4b4f 56%, #081726 100%);
  color: var(--mist);
}

.site-footer__inner {
  display: grid;
  grid-template-columns: 1.15fr 1fr 0.85fr;
  gap: clamp(1.75rem, 4vw, 3.5rem);
  padding-block: clamp(2.5rem, 5vw, 4rem);
}

.site-footer__brand {
  align-self: start;
}

.site-footer__line {
  max-width: 22ch;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.4vw, 1.6rem);
  font-weight: 900;
  line-height: 1.35;
  color: var(--warm);
}

.site-footer__note {
  margin-top: 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--celadon);
}

.site-footer__col {
  min-width: 0;
}

.site-footer__heading {
  margin-bottom: 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--gold);
}

.contact-list {
  display: grid;
  gap: 0.75rem;
}

.contact-list__row {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.65rem;
  align-items: baseline;
}

.contact-list__label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--celadon);
  white-space: nowrap;
}

.contact-list__value {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--warm);
  overflow-wrap: anywhere;
}

.footer-nav__list {
  display: grid;
  gap: 0.55rem;
}

.footer-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding-block: 0.2rem;
  border-bottom: 1px solid transparent;
  font-size: 0.92rem;
  color: var(--mist);
  transition: color 0.18s ease, border-color 0.18s ease;
}

.footer-nav__link::before {
  content: "\203A";
  font-family: var(--font-mono);
  color: var(--coral);
}

.footer-nav__link:hover {
  color: var(--gold);
  border-color: rgba(244, 185, 66, 0.4);
}

.site-footer__bottom {
  border-top: 1px solid rgba(214, 226, 240, 0.18);
  background: rgba(4, 12, 22, 0.35);
}

.site-footer__bottom-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding-block: 1rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: rgba(214, 226, 240, 0.65);
}

.site-footer__icp {
  color: var(--celadon);
}

/* ---------- 滚动显现协议 ---------- */

html.js [data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.42s ease, transform 0.42s ease;
}

html.js [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

html.js [data-reveal-group] > [data-reveal]:nth-child(2) {
  transition-delay: 0.06s;
}

html.js [data-reveal-group] > [data-reveal]:nth-child(3) {
  transition-delay: 0.12s;
}

html.js [data-reveal-group] > [data-reveal]:nth-child(4) {
  transition-delay: 0.18s;
}

html.js [data-reveal-group] > [data-reveal]:nth-child(5) {
  transition-delay: 0.24s;
}

html.js [data-reveal-group] > [data-reveal]:nth-child(6) {
  transition-delay: 0.3s;
}

/* ---------- 响应式 ---------- */

@media (max-width: 1080px) {
  .primary-nav {
    gap: 0.6rem;
  }

  .primary-nav__link {
    padding: 0.5rem 0.62rem;
    font-size: 0.86rem;
  }

  .primary-nav__cta {
    padding: 0.55rem 0.9rem;
    font-size: 0.8rem;
  }
}

@media (max-width: 900px) {
  .nav-toggle {
    display: inline-flex;
  }

  .header-main__inner {
    align-items: center;
  }

  .primary-nav {
    flex-basis: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0.5rem;
    max-height: 0;
    margin-left: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.32s ease, opacity 0.24s ease, padding 0.24s ease;
  }

  .primary-nav[data-open] {
    max-height: 78vh;
    overflow-y: auto;
    opacity: 1;
    padding-block: 0.9rem 0.4rem;
    border-top: 1px solid var(--line);
  }

  .primary-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0.3rem;
  }

  .primary-nav__link {
    width: 100%;
    justify-content: space-between;
    padding: 0.75rem 0.9rem;
    border-color: var(--line);
    font-size: 1rem;
  }

  .primary-nav__item--tag .primary-nav__link {
    border-color: transparent;
  }

  .primary-nav__cta {
    width: 100%;
    margin-top: 0.35rem;
    padding: 0.75rem 1rem;
    font-size: 0.92rem;
  }

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

  .site-footer__brand {
    grid-column: 1 / -1;
  }

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

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

  .header-top__inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.2rem;
  }

  .header-top__brandline {
    font-size: 0.68rem;
    letter-spacing: 0.12em;
  }

  .header-top__meta {
    font-size: 0.64rem;
    letter-spacing: 0.04em;
  }

  .brand-lockup__mark {
    width: 38px;
    height: 38px;
    font-size: 1.15rem;
  }

  .brand-lockup__name {
    font-size: 0.98rem;
  }

  .brand-lockup__sub {
    font-size: 0.56rem;
    letter-spacing: 0.18em;
  }

  .grid--2,
  .grid--3 {
    grid-template-columns: 1fr;
  }

  .site-footer__inner {
    grid-template-columns: 1fr;
  }

  .site-footer__bottom-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .data-table {
    font-size: 0.85rem;
  }

  .data-table th,
  .data-table td {
    padding: 0.7rem 0.8rem;
  }
}

/* ---------- 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;
  }

  html.js [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .scroll-progress {
    display: none;
  }
}