/* ============================================================
   华体会APP CN CN — 全站共享样式
   文件地址 /assets/site.css
   对应 creative_dna：悬浮胶囊 + 侧边轨道 + 档案化信息系统
   ============================================================ */

:root {
  /* 色彩系统 */
  --c-deep: #0B1026;
  --c-ship: #131A3A;
  --c-card: #1B2340;
  --c-orange: #FF6A00;
  --c-orange-bright: #FF8A00;
  --c-purple: #9B4DFF;
  --c-cyan: #00FFAA;
  --c-text: #F5F7FA;
  --c-text-dim: #A0AABF;

  /* 字体 */
  --font-headline: "Archivo Black", "Noto Sans SC", "Source Han Sans SC", sans-serif;
  --font-body: "Inter", "Noto Sans SC", "Source Han Sans SC", sans-serif;
  --font-mono: "SF Mono", "Cascadia Mono", "Roboto Mono", monospace;

  /* 布局 */
  --shell-max: 1280px;
  --shell-pad: clamp(20px, 4vw, 48px);
  --radius-cap: 999px;
  --radius-card: 20px;
  --radius-panel: 14px;

  /* 动效 */
  --dur-fast: 180ms;
  --dur-slow: 420ms;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);

  /* 阴影 */
  --shadow-float: 0 12px 40px rgba(0, 0, 0, 0.42);
  --shadow-glow-orange: 0 4px 24px rgba(255, 106, 0, 0.28);
  --shadow-glow-purple: 0 4px 20px rgba(155, 77, 255, 0.22);

  /* 层级 */
  --z-header: 1000;
  --z-progress: 1100;
  --z-skip: 1200;
  --track-width: 3px;
}

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

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

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--c-deep);
  background-image:
    radial-gradient(ellipse 55% 40% at 12% 0%, rgba(155, 77, 255, 0.08), transparent 60%),
    radial-gradient(ellipse 50% 35% at 100% 10%, rgba(255, 106, 0, 0.05), transparent 55%);
  color: var(--c-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 0.5em;
  font-family: var(--font-headline);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--c-text);
  text-wrap: balance;
}

h1 { font-size: clamp(34px, 5.5vw, 72px); }
h2 { font-size: clamp(26px, 3.6vw, 44px); }
h3 { font-size: clamp(20px, 2.2vw, 28px); }
h4, h5, h6 { font-size: 18px; }

p { margin: 0 0 1em; }

a {
  color: var(--c-cyan);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color var(--dur-fast) ease;
}

a:hover { color: var(--c-orange); }

ul[class],
ol[class] {
  list-style: none;
  margin: 0;
  padding: 0;
}

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

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

main { display: block; }

#main-content:focus { outline: none; }

::selection {
  background: var(--c-orange);
  color: #fff;
}

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

/* ---------- 通用容器 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--shell-pad);
}

.content-area {
  padding-block: clamp(24px, 4vw, 56px);
}

.content-area p {
  color: var(--c-text-dim);
  line-height: 1.9;
}

/* ---------- 类型 ---------- */
.display {
  font-family: var(--font-headline);
  font-size: clamp(48px, 9vw, 96px);
  font-weight: 900;
  line-height: 0.95;
  letter-spacing: -0.02em;
  margin: 0;
}

.prose {
  max-width: 72ch;
}

.prose h2 {
  margin-top: 2em;
  font-family: var(--font-headline);
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.2;
}

.prose h3 {
  margin-top: 1.6em;
  font-family: var(--font-headline);
  font-size: 20px;
}

.prose p,
.prose li {
  color: var(--c-text-dim);
  line-height: 1.9;
}

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

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

.prose a { color: var(--c-cyan); }

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

/* ---------- 跳转链接与阅读进度 ---------- */
.skip-link {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: var(--z-skip);
  padding: 10px 18px;
  border-radius: 0 0 12px 12px;
  background: linear-gradient(90deg, var(--c-orange), var(--c-purple));
  color: #fff;
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
  box-shadow: var(--shadow-float);
  pointer-events: auto;
  transition: top 0.2s var(--ease-out);
}

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

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  z-index: var(--z-progress);
  background: linear-gradient(90deg, var(--c-orange) 0%, var(--c-purple) 65%, var(--c-cyan) 100%);
  transform: scaleX(0);
  transform-origin: left center;
  pointer-events: none;
}

/* ---------- 头部：悬浮胶囊导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  pointer-events: none;
}

.site-header__inner {
  display: flex;
  justify-content: center;
  padding-top: max(10px, env(safe-area-inset-top, 0px) + 6px);
  padding-bottom: 8px;
}

.site-header[data-scrolled] .site-nav {
  background: linear-gradient(145deg, rgba(11, 16, 38, 0.96) 0%, rgba(19, 26, 58, 0.92) 100%);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.55);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 26px);
  padding: 8px 20px;
  border-radius: var(--radius-cap);
  background: linear-gradient(145deg, rgba(19, 26, 58, 0.92) 0%, rgba(11, 16, 38, 0.84) 100%);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  border: 1px solid rgba(155, 77, 255, 0.16);
  border-top-color: rgba(0, 255, 170, 0.10);
  box-shadow: var(--shadow-float);
  pointer-events: auto;
  transition: box-shadow var(--dur-slow) ease, background var(--dur-slow) ease;
}

/* 品牌轨道 */
.brand {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding-left: 16px;
  text-decoration: none;
  flex-shrink: 0;
}

.brand::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: var(--track-width);
  border-radius: var(--track-width);
  background: linear-gradient(180deg, var(--c-orange) 20%, var(--c-purple) 100%);
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  font-family: var(--font-headline);
  font-size: 22px;
  font-weight: 900;
  color: #fff;
  background: linear-gradient(140deg, var(--c-orange) 20%, var(--c-orange-bright) 80%, var(--c-purple) 140%);
  clip-path: polygon(10px 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
  box-shadow: var(--shadow-glow-orange);
  transition: transform var(--dur-slow) var(--ease-out);
}

.brand:hover .brand__mark {
  transform: skewX(-6deg) translateX(2px);
}

.brand__body {
  display: grid;
  gap: 2px;
  line-height: 1.2;
}

.brand__name {
  font-family: var(--font-headline);
  font-size: 18px;
  font-weight: 900;
  letter-spacing: 0.02em;
  color: var(--c-text);
  white-space: nowrap;
}

.brand__tagline {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.24em;
  color: var(--c-text-dim);
  white-space: nowrap;
  text-transform: uppercase;
}

/* 导航列表 */
.site-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.site-nav__item {
  list-style: none;
}

.site-nav__link {
  display: block;
  padding: 9px 15px;
  border-radius: var(--radius-cap);
  color: var(--c-text-dim);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur-fast) ease, background var(--dur-fast) ease, box-shadow var(--dur-fast) ease, transform var(--dur-fast) var(--ease-out);
}

.site-nav__link:hover {
  color: var(--c-text);
  background: rgba(255, 255, 255, 0.06);
  transform: translateY(-1px);
}

.site-nav__link[aria-current="page"] {
  color: #fff;
  background: linear-gradient(120deg, var(--c-orange) 0%, var(--c-orange-bright) 100%);
  box-shadow: var(--shadow-glow-orange);
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: var(--radius-cap);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.10);
  transition: background var(--dur-fast) ease, border-color var(--dur-fast) ease;
}

.nav-toggle:hover {
  background: rgba(255, 255, 255, 0.10);
  border-color: rgba(255, 106, 0, 0.30);
}

.nav-toggle__bars {
  display: grid;
  gap: 4px;
  width: 16px;
}

.nav-toggle__bar {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: var(--c-text);
  transform-origin: center;
  transition: transform var(--dur-fast) var(--ease-out), opacity var(--dur-fast) ease;
}

.nav-toggle__label {
  font-size: 12px;
  font-weight: 700;
  color: var(--c-text);
  letter-spacing: 0.08em;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(64px, 10vw, 120px);
  padding-top: clamp(48px, 6vw, 80px);
  background: linear-gradient(180deg, #0D1230 0%, var(--c-deep) 100%);
  border-top: 1px solid rgba(155, 77, 255, 0.14);
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 50% 40% at 15% 0%, rgba(255, 106, 0, 0.05), transparent 60%),
    radial-gradient(ellipse 45% 35% at 90% 10%, rgba(155, 77, 255, 0.06), transparent 60%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.02) 0%, transparent 30%);
  pointer-events: none;
}

.site-footer::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-orange) 0%, var(--c-purple) 45%, var(--c-cyan) 100%);
  pointer-events: none;
}

.site-footer__inner {
  position: relative;
  z-index: 1;
}

.site-footer__top {
  display: grid;
  grid-template-columns: minmax(280px, 1.6fr) minmax(150px, 0.8fr) minmax(150px, 0.8fr) minmax(220px, 1.2fr);
  gap: clamp(24px, 4vw, 48px);
  padding-bottom: clamp(32px, 5vw, 56px);
}

.site-footer__intro,
.site-footer__nav,
.site-footer__legal,
.site-footer__contact {
  display: grid;
  align-content: start;
}

.site-footer__intro .brand {
  padding-left: 20px;
}

.site-footer__intro .brand::before {
  top: 4px;
  bottom: 4px;
}

.brand--footer .brand__mark {
  width: 48px;
  height: 48px;
  font-size: 24px;
}

.brand--footer .brand__name {
  font-size: 20px;
}

.site-footer__desc {
  margin: 20px 0 0;
  color: var(--c-text-dim);
  font-size: 14px;
  line-height: 1.9;
  max-width: 34em;
}

.site-footer__story {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 18px 0 0;
  padding: 7px 14px;
  border-radius: var(--radius-cap);
  background: rgba(255, 106, 0, 0.07);
  border: 1px solid rgba(255, 106, 0, 0.22);
  color: #FFB066;
  font-size: 13px;
  font-weight: 600;
  line-height: 1.4;
}

.site-footer__heading {
  margin: 0 0 16px;
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-cyan);
}

.site-footer__nav ul,
.site-footer__legal ul {
  display: grid;
  gap: 10px;
}

.site-footer__nav a,
.site-footer__legal a {
  display: inline-block;
  color: var(--c-text-dim);
  font-size: 14px;
  line-height: 1.6;
  text-decoration: none;
  transition: color var(--dur-fast) ease, transform var(--dur-fast) var(--ease-out);
}

.site-footer__nav a:hover,
.site-footer__legal a:hover {
  color: var(--c-orange);
  transform: translateX(4px);
}

.site-footer__contact p {
  margin: 0 0 8px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-text-dim);
  word-break: break-all;
}

.site-footer__contact a {
  color: var(--c-text);
  text-decoration: none;
  transition: color var(--dur-fast) ease;
}

.site-footer__contact a:hover {
  color: var(--c-orange);
}

.site-footer__note {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px dashed rgba(255, 255, 255, 0.14);
  font-size: 12px;
  line-height: 1.7;
  opacity: 0.85;
}

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  padding-top: 22px;
  padding-bottom: max(22px, env(safe-area-inset-bottom, 0px));
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.site-footer__copyright,
.site-footer__icp {
  margin: 0;
  font-size: 13px;
  color: var(--c-text-dim);
}

.site-footer__watermark {
  position: absolute;
  right: -10px;
  bottom: -36px;
  font-family: var(--font-headline);
  font-size: clamp(140px, 22vw, 300px);
  font-weight: 900;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255, 255, 255, 0.035);
  pointer-events: none;
  user-select: none;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-cap);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) ease, background var(--dur-fast) ease, border-color var(--dur-fast) ease;
}

.btn--primary {
  color: #fff;
  background: linear-gradient(120deg, var(--c-orange) 0%, var(--c-orange-bright) 100%);
  box-shadow: var(--shadow-glow-orange);
}

.btn--primary:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(255, 106, 0, 0.36);
}

.btn--ghost {
  color: var(--c-text);
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(255, 255, 255, 0.14);
}

.btn--ghost:hover {
  color: var(--c-text);
  border-color: var(--c-purple);
  transform: translateY(-2px);
}

.btn--sm {
  padding: 8px 16px;
  font-size: 13px;
}

/* ---------- 标签与状态 ---------- */
.tag-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--radius-cap);
  background: rgba(155, 77, 255, 0.10);
  border: 1px solid rgba(155, 77, 255, 0.22);
  color: #C9A2FF;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.tag-pill--live {
  background: rgba(0, 255, 170, 0.08);
  border-color: rgba(0, 255, 170, 0.28);
  color: var(--c-cyan);
}

.live-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-cyan);
  box-shadow: 0 0 0 rgba(0, 255, 170, 0.55);
  animation: live-pulse 2.2s ease-out infinite;
}

@keyframes live-pulse {
  0% { box-shadow: 0 0 0 0 rgba(0, 255, 170, 0.50); }
  70% { box-shadow: 0 0 0 8px rgba(0, 255, 170, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 255, 170, 0); }
}

/* ---------- 数据与档案组件 ---------- */
.data-card {
  position: relative;
  padding: clamp(20px, 3vw, 28px);
  border-radius: var(--radius-card);
  background: linear-gradient(145deg, var(--c-card) 0%, rgba(27, 35, 64, 0.72) 100%);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-left: 3px solid var(--c-orange);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
  transition: transform var(--dur-slow) var(--ease-out), box-shadow var(--dur-slow) var(--ease-out);
}

.data-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.38);
}

.panel {
  padding: clamp(20px, 3vw, 32px);
  border-radius: var(--radius-panel);
  background: rgba(19, 26, 58, 0.62);
  border: 1px solid rgba(255, 255, 255, 0.07);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.score-text {
  font-family: var(--font-headline);
  font-variant-numeric: tabular-nums;
  font-size: clamp(28px, 4vw, 56px);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--c-orange);
}

.catalog-item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding-block: 16px;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.12);
}

.catalog-item:first-child { padding-top: 4px; }

.catalog-item__title {
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 600;
  color: var(--c-text);
  text-decoration: none;
  transition: color var(--dur-fast) ease;
}

.catalog-item__title:hover { color: var(--c-orange); }

.catalog-item__meta {
  flex-shrink: 0;
  font-size: 12px;
  color: var(--c-text-dim);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

.slant-line {
  display: block;
  width: 100%;
  height: 8px;
  margin: clamp(24px, 4vw, 48px) 0;
  background: linear-gradient(115deg, var(--c-orange) 10%, var(--c-purple) 45%, var(--c-cyan) 90%);
  clip-path: polygon(0 0, 100% 0, calc(100% - 80px) 100%, 60px 100%);
  border: 0;
}

/* ---------- 区块与栅格 ---------- */
.section {
  padding-block: clamp(40px, 6vw, 88px);
}

.section--tight {
  padding-block: 24px 48px;
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: clamp(24px, 3vw, 36px);
}

.section-head__eyebrow {
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-purple);
}

.section-head__title {
  margin: 0;
  font-family: var(--font-headline);
  font-size: clamp(26px, 3.8vw, 44px);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.section-head__sub {
  max-width: 34em;
  margin: 0;
  color: var(--c-text-dim);
  font-size: 15px;
  line-height: 1.8;
}

.grid {
  display: grid;
  gap: clamp(20px, 3vw, 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)); }

/* ---------- 子页首屏 ---------- */
.page-hero {
  padding: clamp(48px, 8vw, 100px) 0 clamp(32px, 5vw, 64px);
}

.page-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-cyan);
}

.page-hero__title {
  max-width: 12em;
  margin: 0;
  font-family: var(--font-headline);
  font-size: clamp(40px, 7vw, 72px);
  line-height: 1.02;
  letter-spacing: -0.02em;
}

.page-hero__lead {
  max-width: 36em;
  margin: 24px 0 0;
  padding-left: 20px;
  border-left: 3px solid var(--c-orange);
  color: var(--c-text-dim);
  font-size: clamp(15px, 1.5vw, 18px);
  line-height: 1.8;
}

/* ---------- 面包屑 ---------- */
.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--c-text-dim);
  font-size: 13px;
}

.breadcrumb li:not(:last-child)::after {
  content: "/";
  color: rgba(255, 255, 255, 0.30);
  font-size: 12px;
}

.breadcrumb a {
  color: var(--c-text-dim);
  text-decoration: none;
  transition: color var(--dur-fast) ease;
}

.breadcrumb a:hover { color: var(--c-orange); }

.breadcrumb li[aria-current="page"] {
  color: var(--c-text);
  font-weight: 600;
}

/* ---------- 图片容器 ---------- */
.image-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-card);
  background: linear-gradient(145deg, var(--c-card), var(--c-ship));
}

.image-frame::before {
  content: "";
  display: block;
  padding-top: 56.25%;
}

.image-frame > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.image-frame--wide::before { padding-top: 42%; }
.image-frame--portrait::before { padding-top: 125%; }
.image-frame--square::before { padding-top: 100%; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .site-footer__top {
    grid-template-columns: 1fr 1fr;
  }

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

@media (max-width: 900px) {
  .site-header__inner {
    padding-top: max(8px, env(safe-area-inset-top, 0px));
  }

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

  .site-nav {
    flex-wrap: wrap;
    width: 100%;
    gap: 8px 16px;
    border-radius: 24px;
    padding: 8px;
  }

  .site-nav__list {
    display: none;
    width: 100%;
    flex-direction: column;
    gap: 4px;
    padding: 8px 6px 6px;
  }

  .site-nav[data-open] .site-nav__list {
    display: flex;
  }

  .site-nav__link {
    padding: 12px 16px;
    border-radius: 14px;
    font-size: 15px;
  }

  .nav-toggle {
    margin-left: auto;
  }

  .brand__tagline {
    font-size: 9px;
  }

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

@media (max-width: 640px) {
  .site-footer__top {
    grid-template-columns: 1fr;
  }

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

  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }
}

/* ---------- 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .brand__mark,
  .data-card,
  .btn {
    transform: none !important;
  }

  .live-dot {
    animation: none;
  }
}