/* =========================================================
   银河娱乐入口 · 共享站点样式 /assets/site.css
   ========================================================= */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

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

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

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

button, input, select, textarea { font: inherit; color: inherit; }

table { border-collapse: collapse; }

a { color: inherit; }

/* ---------- 变量 ---------- */
:root {
  --void: #04051a;
  --void-2: #080b26;
  --void-3: #0f1338;
  --indigo: #1b1f5e;
  --nebula: #7b4fd6;
  --nebula-soft: #a878f0;
  --cyan: #3fe3ff;
  --gold: #e6c98d;

  --text: #e9ecff;
  --text-dim: #a8b0d6;
  --text-mute: #727aa6;

  --line: rgba(140, 160, 255, .16);
  --line-strong: rgba(160, 180, 255, .34);

  --radius-s: 8px;
  --radius-m: 16px;
  --radius-l: 28px;
  --radius-pill: 999px;

  --wrap: 1200px;
  --gutter: clamp(20px, 4vw, 56px);
  --header-h: 74px;

  --font-display: "PingFang SC", "Helvetica Neue", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-text: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;

  --ease: cubic-bezier(.22, .9, .24, 1);
}

/* ---------- 基础排版 ---------- */
body {
  min-height: 100vh;
  font-family: var(--font-text);
  font-size: 16px;
  line-height: 1.8;
  letter-spacing: .012em;
  color: var(--text);
  background-color: var(--void);
  background-image:
    radial-gradient(1.2px 1.2px at 24px 36px, rgba(255, 255, 255, .42), transparent),
    radial-gradient(1px 1px at 146px 96px, rgba(63, 227, 255, .34), transparent),
    radial-gradient(1px 1px at 226px 56px, rgba(230, 201, 141, .32), transparent),
    radial-gradient(900px 520px at 82% -8%, rgba(123, 79, 214, .30), transparent 62%),
    radial-gradient(760px 480px at 6% 3%, rgba(63, 227, 255, .12), transparent 60%),
    linear-gradient(180deg, #070925 0%, #04051a 46%, #080a26 100%);
  background-repeat: repeat, repeat, repeat, no-repeat, no-repeat, no-repeat;
  background-size: 260px 260px, 340px 340px, 460px 460px, auto, auto, auto;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  font-weight: 300;
  line-height: 1.2;
  color: var(--text);
}

::selection {
  background: rgba(63, 227, 255, .3);
  color: #fff;
}

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

.display-1 {
  font-family: var(--font-display);
  font-size: clamp(38px, 7.4vw, 84px);
  font-weight: 200;
  line-height: 1.04;
  letter-spacing: .004em;
}

.display-2 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4.6vw, 52px);
  font-weight: 200;
  line-height: 1.14;
}

.h-section {
  font-size: clamp(22px, 2.6vw, 34px);
  font-weight: 300;
}

.h-card {
  font-size: clamp(17px, 1.5vw, 20px);
  font-weight: 400;
}

.lead {
  max-width: 62ch;
  font-size: clamp(16px, 1.5vw, 19px);
  line-height: 1.85;
  color: var(--text-dim);
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .04em;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .34em;
  text-transform: uppercase;
  color: var(--cyan);
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan), transparent);
}

.section-index {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(34px, 6vw, 76px);
  font-weight: 200;
  line-height: .9;
  color: rgba(160, 180, 255, .16);
  -webkit-text-stroke: 1px rgba(160, 180, 255, .34);
}

.prose p {
  margin: 0 0 1.15em;
  color: var(--text-dim);
}

.prose h2,
.prose h3 {
  margin: 1.8em 0 .7em;
  color: var(--text);
}

.prose strong { color: var(--text); }

.prose a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(63, 227, 255, .4);
}

.prose ul,
.prose ol {
  margin: 0 0 1.3em;
  padding-left: 1.4em;
}

.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li { margin-bottom: .5em; color: var(--text-dim); }

/* ---------- 布局工具 ---------- */
.container {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(48px, 8vw, 104px); }
.section--tight { padding-block: clamp(32px, 5vw, 64px); }

.section-head {
  display: grid;
  gap: 14px;
  max-width: 72ch;
  margin-bottom: clamp(28px, 4vw, 52px);
}

.grid {
  display: grid;
  gap: clamp(18px, 2.6vw, 32px);
}

.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* ---------- 按钮 ---------- */
.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 26px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-size: 14px;
  letter-spacing: .08em;
  text-decoration: none;
  cursor: pointer;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease),
              background-color .25s var(--ease), border-color .25s var(--ease), color .25s var(--ease);
}

.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background-image: linear-gradient(120deg, var(--cyan), var(--nebula-soft) 56%, var(--gold));
  color: #05061a;
  font-weight: 600;
  box-shadow: 0 14px 32px -16px rgba(63, 227, 255, .8);
}

.btn--primary:hover { box-shadow: 0 18px 38px -14px rgba(168, 120, 240, .8); }

.btn--ghost {
  background: rgba(255, 255, 255, .035);
  border-color: var(--line-strong);
  color: var(--text);
}

.btn--ghost:hover { border-color: var(--cyan); color: #fff; }

.btn--gold {
  background: rgba(230, 201, 141, .08);
  border-color: rgba(230, 201, 141, .5);
  color: var(--gold);
}

.btn--gold:hover { background: rgba(230, 201, 141, .16); }

/* ---------- 面包屑 ---------- */
.breadcrumb { margin-bottom: clamp(18px, 2.4vw, 30px); }

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--text-mute);
}

.breadcrumb-list li {
  display: flex;
  align-items: center;
}

.breadcrumb-list li + li::before {
  content: "/";
  padding: 0 10px;
  color: var(--line-strong);
}

.breadcrumb-list a {
  color: var(--text-dim);
  text-decoration: none;
  transition: color .2s var(--ease);
}

.breadcrumb-list a:hover { color: var(--cyan); }

/* ---------- 卡片 / 面板 ---------- */
.card {
  position: relative;
  padding: clamp(20px, 2.6vw, 32px);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background-image: linear-gradient(160deg, rgba(21, 25, 68, .78), rgba(7, 9, 30, .62));
  overflow: hidden;
  transition: border-color .3s var(--ease), transform .3s var(--ease);
}

.card::after {
  content: "";
  position: absolute;
  inset: auto -30% -60% auto;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(123, 79, 214, .26), transparent 70%);
  pointer-events: none;
}

.card:hover {
  border-color: var(--line-strong);
  transform: translateY(-3px);
}

.card > * { position: relative; z-index: 1; }

.card-title {
  margin-bottom: 10px;
  font-size: clamp(17px, 1.5vw, 20px);
  font-weight: 400;
}

.card-text {
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-dim);
}

.panel {
  padding: clamp(20px, 2.4vw, 30px);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background-image: linear-gradient(160deg, rgba(17, 21, 58, .74), rgba(6, 8, 28, .72));
}

.panel-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 14px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

/* ---------- 标记 ---------- */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, .03);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--text-dim);
}

.pill--cyan {
  color: var(--cyan);
  border-color: rgba(63, 227, 255, .45);
  background: rgba(63, 227, 255, .08);
}

.pill--gold {
  color: var(--gold);
  border-color: rgba(230, 201, 141, .45);
  background: rgba(230, 201, 141, .08);
}

/* ---------- 键值明细 ---------- */
.kv { display: grid; gap: 0; }

.kv-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 20px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
}

.kv-key {
  font-size: 13px;
  color: var(--text-mute);
  letter-spacing: .06em;
}

.kv-val {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text);
}

/* ---------- 表格 ---------- */
.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.data-table {
  width: 100%;
  min-width: 560px;
  font-size: 14px;
}

.data-table caption {
  padding-bottom: 12px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--text-mute);
}

.data-table th,
.data-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--line);
}

.data-table th {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: .16em;
  color: var(--cyan);
}

.data-table td { color: var(--text-dim); }

.data-table tbody tr { transition: background-color .2s var(--ease); }
.data-table tbody tr:hover { background: rgba(63, 227, 255, .045); }
.data-table tbody tr:hover td { color: var(--text); }

.data-table .num {
  font-family: var(--font-mono);
  color: var(--text);
}

/* ---------- 可展开内容组 ---------- */
.accordion { border-top: 1px solid var(--line); }

.accordion-item { border-bottom: 1px solid var(--line); }

.accordion-item summary {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 20px 0;
  list-style: none;
  cursor: pointer;
  font-size: clamp(16px, 1.4vw, 19px);
  color: var(--text);
  transition: color .2s var(--ease);
}

.accordion-item summary::-webkit-details-marker { display: none; }

.accordion-item summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--cyan);
  transition: transform .3s var(--ease), color .3s var(--ease);
}

.accordion-item summary:hover { color: #fff; }

.accordion-item[open] summary::after {
  transform: rotate(45deg);
  color: var(--gold);
}

.accordion-body {
  padding: 0 0 24px;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--text-dim);
}

/* ---------- 图片容器 ---------- */
.media-frame {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background-image: linear-gradient(150deg, #0d1030, #1a1240 60%, #0a0c2a);
}

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--square { aspect-ratio: 1 / 1; }

.media-frame--glow::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(4, 5, 26, 0) 42%, rgba(4, 5, 26, .78));
  pointer-events: none;
}

.media-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--text-mute);
}

/* ---------- 跳至主内容 ---------- */
.skip-link {
  position: absolute;
  left: 50%;
  top: -120px;
  z-index: 200;
  padding: 10px 22px;
  border-radius: 0 0 var(--radius-s) var(--radius-s);
  background: var(--cyan);
  color: #04051a;
  font-size: 13px;
  letter-spacing: .08em;
  text-decoration: none;
  transform: translateX(-50%);
  transition: top .2s var(--ease);
}

.skip-link:focus { top: 0; }

/* ---------- 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background-image: linear-gradient(180deg, rgba(7, 9, 32, .97), rgba(7, 9, 32, .9));
  border-bottom: 1px solid var(--line);
}

.site-header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(63, 227, 255, .55) 22%, rgba(230, 201, 141, .5) 64%, transparent);
  pointer-events: none;
}

.scroll-progress {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 2;
  width: 100%;
  height: 2px;
  background-image: linear-gradient(90deg, var(--cyan), var(--nebula-soft) 55%, var(--gold));
  transform: scaleX(0);
  transform-origin: 0 50%;
  pointer-events: none;
  will-change: transform;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  width: 100%;
  max-width: var(--wrap);
  min-height: var(--header-h);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 13px;
  text-decoration: none;
  color: var(--text);
  flex: none;
}

.brand-emblem {
  position: relative;
  width: 34px;
  height: 34px;
  flex: none;
  border: 1px solid rgba(230, 201, 141, .5);
  border-radius: 50%;
}

.brand-emblem i {
  position: absolute;
  inset: 6px;
  border-radius: 50%;
  background: radial-gradient(circle at 32% 30%, var(--cyan), var(--nebula) 62%, rgba(4, 5, 26, 0) 74%);
  box-shadow: 0 0 16px rgba(63, 227, 255, .5);
}

.brand-emblem::after {
  content: "";
  position: absolute;
  inset: -7px -11px;
  border: 1px solid rgba(160, 180, 255, .3);
  border-radius: 50%;
  transform: rotate(-26deg);
}

.brand-text { display: block; }

.brand-name {
  display: block;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: .14em;
}

.brand-sub {
  display: block;
  font-family: var(--font-mono);
  font-size: 9.5px;
  line-height: 1.4;
  letter-spacing: .32em;
  color: var(--text-mute);
}

/* 导航 */
.route-readout { display: none; }

.site-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(4px, 1.5vw, 22px);
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 10px 4px;
  font-size: 14px;
  letter-spacing: .06em;
  color: var(--text-dim);
  text-decoration: none;
  transition: color .25s var(--ease);
  white-space: nowrap;
}

.nav-index {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: .06em;
  color: var(--text-mute);
  transition: color .25s var(--ease);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 2px;
  height: 1px;
  background-image: linear-gradient(90deg, var(--cyan), var(--gold));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .3s var(--ease);
}

.nav-link:hover,
.nav-link:focus-visible { color: var(--text); }

.nav-link:hover::after,
.nav-link:focus-visible::after { transform: scaleX(1); }

.nav-link[aria-current="page"] { color: #fff; }

.nav-link[aria-current="page"] .nav-index { color: var(--cyan); }

.nav-link[aria-current="page"]::after { transform: scaleX(1); }

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  position: relative;
  z-index: 90;
  align-items: center;
  gap: 10px;
  padding: 9px 16px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill);
  background: rgba(63, 227, 255, .07);
  color: var(--text);
  font-size: 13px;
  letter-spacing: .14em;
  cursor: pointer;
}

.nav-toggle-bars {
  display: inline-flex;
  flex-direction: column;
  gap: 5px;
  width: 18px;
}

.nav-toggle-bars i {
  display: block;
  height: 1px;
  background: currentColor;
  transition: transform .3s var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:first-child {
  transform: translateY(3px) rotate(38deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:last-child {
  transform: translateY(-3px) rotate(-38deg);
}

body[data-nav-open="true"] { overflow: hidden; }

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(64px, 9vw, 140px);
  border-top: 1px solid var(--line);
  background-image: linear-gradient(180deg, rgba(15, 19, 56, .6), rgba(4, 5, 26, .99) 62%);
  overflow: hidden;
}

.site-footer::before,
.site-footer::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}

.site-footer::before {
  top: -190px;
  left: -140px;
  width: 480px;
  height: 480px;
  background: radial-gradient(circle, rgba(123, 79, 214, .32), transparent 70%);
}

.site-footer::after {
  right: -170px;
  bottom: -220px;
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, rgba(63, 227, 255, .16), transparent 70%);
}

.site-footer > * { position: relative; z-index: 1; }

.footer-main {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 2fr);
  gap: clamp(32px, 5vw, 72px);
  padding-block: clamp(44px, 6vw, 80px) clamp(28px, 4vw, 44px);
}

.footer-wordmark {
  font-family: var(--font-display);
  font-size: clamp(30px, 6.4vw, 60px);
  font-weight: 200;
  line-height: 1.06;
  letter-spacing: .04em;
  color: var(--text);
}

@supports ((-webkit-background-clip: text) or (background-clip: text)) {
  .footer-wordmark {
    background-image: linear-gradient(100deg, #ffffff, #a878f0 44%, #3fe3ff 76%, #e6c98d);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    -webkit-text-fill-color: transparent;
  }
}

.footer-tagline {
  margin-top: 16px;
  font-size: 15px;
  letter-spacing: .1em;
  color: var(--text-dim);
}

.footer-brand-note {
  margin-top: 10px;
  max-width: 30ch;
  font-size: 13px;
  line-height: 1.85;
  color: var(--text-mute);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 40px);
}

.footer-col-title {
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--cyan);
}

.footer-list { display: grid; gap: 10px; }

.footer-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14.5px;
  color: var(--text-dim);
  text-decoration: none;
  transition: color .22s var(--ease), gap .22s var(--ease);
}

.footer-link::before {
  content: "";
  width: 12px;
  height: 1px;
  background: var(--line-strong);
  transition: width .22s var(--ease), background-color .22s var(--ease);
}

.footer-link:hover,
.footer-link:focus-visible { color: #fff; gap: 12px; }

.footer-link:hover::before,
.footer-link:focus-visible::before {
  width: 20px;
  background: var(--gold);
}

.footer-contact {
  padding-block: clamp(24px, 3vw, 36px);
  border-top: 1px solid var(--line);
}

.contact-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px clamp(24px, 4vw, 64px);
}

.contact-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.contact-key {
  flex: none;
  min-width: 5em;
  font-size: 12.5px;
  letter-spacing: .12em;
  color: var(--text-mute);
}

.contact-val {
  font-size: 14px;
  color: var(--text);
  word-break: break-word;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 28px;
  padding-block: 20px 34px;
  border-top: 1px solid var(--line);
}

.legal-copy,
.legal-meta {
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--text-mute);
}

/* ---------- 动效 ---------- */
:root.js-ready [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}

:root.js-ready [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@keyframes orbit-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .42; transform: scale(.7); }
}

/* ---------- 响应式 ---------- */
@media (min-width: 1100px) {
  .route-readout {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-right: 26px;
    padding: 6px 14px;
    border: 1px solid var(--line);
    border-radius: var(--radius-pill);
    background: rgba(63, 227, 255, .05);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .12em;
    color: var(--text-mute);
  }

  .route-readout-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--cyan);
    box-shadow: 0 0 10px var(--cyan);
    animation: orbit-pulse 2.4s ease-in-out infinite;
  }
}

@media (max-width: 1080px) {
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  :root { --header-h: 64px; }

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

  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: auto;
    z-index: 80;
    width: min(88vw, 380px);
    padding: calc(var(--header-h) + 34px) 28px 44px;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    overflow-y: auto;
    border-left: 1px solid var(--line-strong);
    background-image: linear-gradient(200deg, #0b0f33 0%, #150c33 56%, #06081f 100%);
    transform: translateX(103%);
    visibility: hidden;
    transition: transform .4s var(--ease), visibility .4s linear;
  }

  .site-nav[data-open="true"] {
    transform: none;
    visibility: visible;
  }

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

  .nav-link {
    font-size: 22px;
    font-weight: 300;
    padding: 18px 2px;
    border-bottom: 1px solid var(--line);
  }

  .nav-link::after { display: none; }

  .nav-index { font-size: 11px; color: var(--text-mute); }

  .nav-link[aria-current="page"] .nav-text {
    background-image: linear-gradient(100deg, var(--cyan), var(--gold));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    -webkit-text-fill-color: transparent;
  }

  .footer-main { grid-template-columns: 1fr; }

  .contact-list { grid-template-columns: 1fr; }
}

@media (max-width: 680px) {
  .grid--2,
  .grid--3,
  .grid--4 { grid-template-columns: 1fr; }

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

  .brand-sub { letter-spacing: .2em; }

  .btn { width: 100%; }

  .btn-row { flex-direction: column; }
}

@media (max-width: 420px) {
  .footer-nav { grid-template-columns: 1fr; }
  .nav-toggle-label { display: none; }
}

/* ---------- 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }

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

  .btn:hover,
  .card:hover { transform: none; }
}