/* ==========================================================================
   赢宝 · 轻量直达  /assets/site.css
   共享外壳：reset、变量、中文排版、页头、页脚、按钮、网格与基础组件
   ========================================================================== */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body,
h1, h2, h3, h4, h5, h6,
p, ul, ol, dl, dd, figure, blockquote, pre, table {
  margin: 0;
}

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

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

a { color: inherit; }

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

img { height: auto; }

table { border-collapse: collapse; width: 100%; }

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

/* ---------- 2. Design tokens ---------- */
:root {
  /* 色彩 */
  --red: #E23A2E;
  --red-deep: #A8241B;
  --ink: #141414;
  --char: #3A3A38;
  --index-gray: #6E6A64;
  --paper: #F5F0E8;
  --paper-2: #FBF8F2;
  --rule: #E4DCCD;
  --celadon: #3C8C7A;
  --celadon-deep: #2A6659;
  --gold: #D9A441;
  --shade: #EDE6DA;

  /* 字体 */
  --font-title: "Noto Sans SC", "Source Han Sans SC", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Noto Serif SC", "Source Han Serif SC", "Songti SC",
    "SimSun", Georgia, serif;
  --font-mono: ui-monospace, "JetBrains Mono", Menlo, Consolas,
    "Courier New", monospace;

  /* 字号阶梯 */
  --step--1: 14px;
  --step-0: 16px;
  --step-1: 18px;
  --step-2: 24px;
  --step-3: clamp(26px, 3.4vw, 34px);
  --step-4: clamp(34px, 5.2vw, 56px);
  --step-5: clamp(46px, 8.6vw, 88px);

  /* 空间与形状 */
  --gutter: clamp(20px, 4.4vw, 56px);
  --maxw: 1240px;
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --header-h: 88px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 3. 中文排版基线 ---------- */
body {
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.85;
  color: var(--ink);
  background-color: var(--paper);
  background-image:
    repeating-linear-gradient(90deg, rgba(20, 20, 20, 0.017) 0 1px, transparent 1px 4px),
    repeating-linear-gradient(0deg, rgba(20, 20, 20, 0.013) 0 1px, transparent 1px 4px);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 {
  font-family: var(--font-title);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.18;
  text-wrap: balance;
}

h1 { font-size: var(--step-5); }
h2 { font-size: var(--step-3); }
h3 { font-size: var(--step-2); }
h4 { font-size: var(--step-1); letter-spacing: 0; }

p { max-width: 38em; }

strong { font-weight: 700; }

::selection {
  background: rgba(226, 58, 46, 0.18);
  color: var(--ink);
}

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

#main-content { scroll-margin-top: 96px; }

/* ---------- 4. 通用容器与排版工具 ---------- */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.wrap--narrow { max-width: 820px; }

.section { padding-block: clamp(48px, 7vw, 96px); }
.section--tight { padding-block: clamp(28px, 4vw, 56px); }

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

.idx {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: 0.14em;
  color: var(--red);
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--index-gray);
  text-transform: none;
}

.section-title {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: var(--step-3);
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.lede {
  font-size: var(--step-1);
  line-height: 1.8;
  color: var(--char);
}

.hairline {
  height: 1px;
  border: 0;
  background: var(--rule);
}

/* ---------- 5. 跳转链 ---------- */
.skip-link {
  position: fixed;
  top: 0;
  left: 50%;
  z-index: 200;
  padding: 10px 24px;
  border-radius: 0 0 14px 14px;
  background: var(--ink);
  color: var(--paper-2);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-decoration: none;
  transform: translate(-50%, -140%);
  transition: transform 0.18s var(--ease);
}

.skip-link:focus-visible {
  transform: translate(-50%, 0);
  outline-offset: 2px;
}

/* ---------- 6. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 70;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color 0.2s var(--ease),
    border-color 0.2s var(--ease),
    box-shadow 0.2s var(--ease);
}

.site-header.is-solid {
  background: rgba(251, 248, 242, 0.96);
  border-bottom-color: var(--rule);
  box-shadow: 0 18px 30px -30px rgba(20, 20, 20, 0.6);
  -webkit-backdrop-filter: saturate(120%) blur(6px);
  backdrop-filter: saturate(120%) blur(6px);
}

.site-header__inner {
  position: relative;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: flex;
  align-items: center;
  gap: clamp(12px, 2.4vw, 36px);
  min-height: var(--header-h);
  transition: min-height 0.2s var(--ease);
}

.site-header.is-solid .site-header__inner { min-height: 64px; }

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex: 0 0 auto;
  text-decoration: none;
  color: var(--ink);
  transition: opacity 0.18s var(--ease);
}

.brand:hover { opacity: 0.82; }

.brand__mark {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 12px;
  background: var(--red);
  color: #fff;
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 17px;
  line-height: 1;
  letter-spacing: 0;
  box-shadow: 0 6px 0 -3px rgba(226, 58, 46, 0.28);
  transition: width 0.2s var(--ease), height 0.2s var(--ease),
    border-radius 0.2s var(--ease), font-size 0.2s var(--ease);
}

.site-header.is-solid .brand__mark {
  width: 30px;
  height: 30px;
  border-radius: 10px;
  font-size: 15px;
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand__name {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 19px;
  letter-spacing: -0.02em;
}

.brand__line {
  margin-top: 3px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--index-gray);
}

/* 主导航 */
.site-nav { margin-inline-start: auto; }

.site-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(8px, 1.6vw, 26px);
}

.site-nav__link {
  position: relative;
  display: inline-block;
  padding: 6px 0;
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--char);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.18s var(--ease);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--red);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.2s var(--ease);
}

.site-nav__link:hover { color: var(--ink); }
.site-nav__link:hover::after { transform: scaleX(1); }

.site-nav__link[aria-current="page"] {
  color: var(--red-deep);
  font-weight: 600;
}

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

.site-nav__foot { display: none; }

/* 页头操作区 */
.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex: 0 0 auto;
}

.header-actions__link {
  font-size: 14px;
  color: var(--char);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.header-actions__link:hover {
  color: var(--ink);
  border-bottom-color: var(--red);
}

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--rule);
  border-radius: 14px;
  background: var(--paper-2);
  cursor: pointer;
  transition: border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}

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

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--ink);
  transition: background-color 0.18s var(--ease);
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--ink);
  transition: transform 0.2s var(--ease);
}

.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after { top: 6px; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background-color: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-6px) rotate(-45deg); }

/* 阅读进度 */
.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  pointer-events: none;
}

.scroll-progress span {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--red), var(--gold));
  transform: scaleX(0);
  transform-origin: left center;
}

/* ---------- 7. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: transparent;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.1;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease),
    border-color 0.18s var(--ease), transform 0.18s var(--ease),
    box-shadow 0.18s var(--ease);
}

.btn--primary {
  background: var(--red);
  color: #fff;
  box-shadow: 0 10px 18px -14px rgba(226, 58, 46, 0.9);
}

.btn--primary:hover {
  background: var(--red-deep);
  transform: translateY(-1px);
}

.btn--primary:active { transform: translateY(0); }

.btn--ghost {
  background: var(--paper-2);
  border-color: var(--rule);
  color: var(--ink);
}

.btn--ghost:hover { border-color: var(--ink); }

.btn--sm {
  padding: 10px 16px;
  font-size: 14px;
}

.btn--mono {
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

/* ---------- 8. 标签与胶囊 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: var(--paper-2);
  color: var(--char);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.tag--red {
  color: var(--red-deep);
  border-color: rgba(226, 58, 46, 0.34);
  background: rgba(226, 58, 46, 0.08);
}

.tag--celadon {
  color: var(--celadon-deep);
  border-color: rgba(60, 140, 122, 0.34);
  background: rgba(60, 140, 122, 0.1);
}

.tag--gold {
  color: #8a6415;
  border-color: rgba(217, 164, 65, 0.5);
  background: rgba(217, 164, 65, 0.16);
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: var(--paper-2);
  color: var(--char);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease),
    border-color 0.18s var(--ease), transform 0.18s var(--ease);
}

.pill:hover {
  border-color: var(--ink);
  transform: translateY(-1px);
}

.pill.is-active {
  background: var(--red);
  border-color: var(--red);
  color: #fff;
}

/* ---------- 9. 索引抽屉 ---------- */
.drawer {
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  background: var(--paper-2);
  overflow: hidden;
}

.drawer + .drawer { margin-top: 12px; }

.drawer__head {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 18px 20px;
  text-align: left;
  cursor: pointer;
  transition: background-color 0.18s var(--ease);
}

.drawer__head:hover { background: var(--shade); }

.drawer__title {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 18px;
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.drawer__chev {
  margin-inline-start: auto;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--index-gray);
  transition: transform 0.2s var(--ease), color 0.2s var(--ease);
}

.drawer__head[aria-expanded="true"] .drawer__chev {
  transform: rotate(90deg);
  color: var(--red);
}

.drawer__body { padding: 0 20px 22px; }

[data-filter-item].is-filtered { display: none !important; }

/* ---------- 10. 面包屑 ---------- */
.breadcrumb {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--index-gray);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

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

.breadcrumb a:hover {
  color: var(--red-deep);
  border-bottom-color: var(--red);
}

.breadcrumb li + li::before {
  content: "/";
  margin-inline-end: 8px;
  color: var(--rule);
}

/* ---------- 11. 图片容器 ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  background-color: var(--paper-2);
  background-image: repeating-linear-gradient(
    135deg,
    rgba(20, 20, 20, 0.032) 0 1px,
    transparent 1px 9px
  );
}

.media > img,
.media > svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x3 { aspect-ratio: 4 / 3; }
.media--1x1 { aspect-ratio: 1 / 1; }
.media--3x4 { aspect-ratio: 3 / 4; }
.media--tilt { transform: rotate(-0.6deg); }

.media__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--index-gray);
  max-width: none;
}

/* ---------- 12. 入场显现 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}

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

/* ---------- 13. 悬浮操作栈 ---------- */
.float-stack {
  position: fixed;
  right: clamp(14px, 2.4vw, 28px);
  bottom: clamp(18px, 3vw, 34px);
  z-index: 80;
  display: flex;
  flex-direction: column;
  gap: 10px;
  opacity: 0;
  transform: translateY(14px);
  pointer-events: none;
  transition: opacity 0.24s var(--ease), transform 0.24s var(--ease);
}

.float-stack.is-visible {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}

.float-stack__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-width: 52px;
  height: 52px;
  padding: 0 16px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: var(--paper-2);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  text-decoration: none;
  cursor: pointer;
  box-shadow: 0 14px 24px -20px rgba(20, 20, 20, 0.7);
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease),
    border-color 0.18s var(--ease), transform 0.18s var(--ease);
}

.float-stack__btn:hover {
  border-color: var(--ink);
  transform: translateY(-2px);
}

.float-stack__btn--accent {
  background: var(--red);
  border-color: var(--red);
  color: #fff;
}

.float-stack__btn--accent:hover {
  background: var(--red-deep);
  border-color: var(--red-deep);
}

.float-stack__btn--top {
  width: 52px;
  padding: 0;
}

/* ---------- 14. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(64px, 9vw, 120px);
  background: var(--shade);
  border-top: 1px solid var(--rule);
  color: var(--char);
}

.site-footer__tape {
  height: 3px;
  background: linear-gradient(90deg, var(--red) 0 120px, var(--rule) 120px 100%);
}

.site-footer__inner {
  display: grid;
  gap: clamp(32px, 4vw, 56px);
  grid-template-columns: minmax(0, 1fr);
  grid-template-areas:
    "brand"
    "nav"
    "contact";
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(40px, 5vw, 60px) var(--gutter) clamp(32px, 4vw, 44px);
}

.site-footer__brand { grid-area: brand; }
.footer-nav { grid-area: nav; }
.site-footer__contact { grid-area: contact; }

.brand--footer { color: var(--ink); }

.site-footer__motto {
  margin-top: 18px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--char);
  max-width: 22em;
}

.site-footer__tag {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
  max-width: none;
}

.footer-nav {
  display: grid;
  gap: 28px 24px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.footer-nav__title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.2em;
  color: var(--index-gray);
  line-height: 1.4;
}

.footer-nav__list {
  display: grid;
  gap: 9px;
}

.footer-nav__list a {
  font-size: 15px;
  color: var(--char);
  text-decoration: none;
  padding-bottom: 1px;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.footer-nav__list a:hover {
  color: var(--red-deep);
  border-bottom-color: var(--red);
}

.contact-row {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 10px;
  font-size: 14px;
  line-height: 1.7;
  max-width: none;
  color: var(--char);
}

.contact-row__key {
  flex: 0 0 auto;
  padding-top: 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--index-gray);
}

.copy-mail {
  padding: 5px 12px;
  border: 1px dashed var(--rule);
  border-radius: 999px;
  background: var(--paper-2);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 13px;
  text-align: left;
  word-break: break-all;
  cursor: pointer;
  transition: border-color 0.18s var(--ease), background-color 0.18s var(--ease),
    color 0.18s var(--ease);
}

.copy-mail:hover {
  border-color: var(--celadon);
  color: var(--celadon-deep);
}

.copy-mail.is-copied {
  border-style: solid;
  border-color: var(--celadon);
  background: rgba(60, 140, 122, 0.12);
  color: var(--celadon-deep);
}

.site-footer__note {
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.8;
  letter-spacing: 0.02em;
  color: var(--index-gray);
  max-width: 30em;
}

.site-footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  max-width: var(--maxw);
  margin-inline: auto;
  padding: 18px var(--gutter) 30px;
  border-top: 1px solid rgba(20, 20, 20, 0.08);
}

.site-footer__copy {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--index-gray);
  max-width: none;
}

.site-footer__legal-list {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.site-footer__legal-list a {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--index-gray);
  text-decoration: none;
  transition: color 0.18s var(--ease);
}

.site-footer__legal-list a:hover { color: var(--red-deep); }

/* ---------- 15. 响应式 ---------- */
@media (min-width: 640px) {
  .footer-nav { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (min-width: 900px) {
  .site-footer__inner {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.9fr);
    grid-template-areas:
      "brand nav"
      "contact contact";
  }
}

@media (min-width: 1140px) {
  .site-footer__inner {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.9fr) minmax(0, 1fr);
    grid-template-areas: "brand nav contact";
  }
}

@media (max-width: 1140px) {
  .header-actions__link { display: none; }
}

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

  .site-header__inner { gap: 12px; }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: none;
    max-height: calc(100vh - 72px);
    overflow-y: auto;
    padding: 6px var(--gutter) 22px;
    background: var(--paper-2);
    border-bottom: 1px solid var(--rule);
    box-shadow: 0 26px 34px -30px rgba(20, 20, 20, 0.7);
  }

  .site-nav[data-open="true"] {
    display: block;
    animation: navDrop 0.2s var(--ease);
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .site-nav__item { border-bottom: 1px dashed var(--rule); }

  .site-nav__link {
    display: block;
    padding: 15px 2px;
    font-size: 17px;
  }

  .site-nav__link::after { display: none; }

  .site-nav__link[aria-current="page"]::before {
    content: "";
    display: inline-block;
    width: 6px;
    height: 6px;
    margin-inline-end: 9px;
    border-radius: 50%;
    background: var(--red);
    vertical-align: middle;
  }

  .site-nav__foot {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 18px;
  }

  .header-actions__cta { padding: 9px 14px; font-size: 13px; }

  .float-stack__btn { height: 46px; min-width: 46px; font-size: 12px; }
  .float-stack__btn--top { width: 46px; }
}

@media (max-width: 380px) {
  .brand__line { display: none; }
  .header-actions__cta { padding: 8px 12px; font-size: 12px; }
}

@keyframes navDrop {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: none; }
}

/* ---------- 16. 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

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

  .float-stack {
    transform: none !important;
  }
}