/* ==========================================================================
   UED设计 · 沿路细节 —— 全站共享样式 /assets/site.css
   ========================================================================== */

/* ---------- 1. Reset 与基础 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scrollbar-color: var(--line-coast) var(--background-sand);
  line-height: 1.6;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--body-font);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-dark);
  background-color: var(--background-sand);
  background-image:
    radial-gradient(circle at 12% 18%, rgba(255, 107, 53, 0.07) 0px, transparent 220px),
    radial-gradient(circle at 88% 8%, rgba(42, 157, 143, 0.07) 0px, transparent 260px),
    radial-gradient(circle at 68% 82%, rgba(11, 60, 93, 0.05) 0px, transparent 300px);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  word-break: break-word;
}

@media (max-width: 640px) {
  body {
    background-attachment: scroll;
  }
}

ul,
ol {
  list-style: none;
}

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

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

button {
  background: none;
  border: 0;
  cursor: pointer;
}

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

::selection {
  background: var(--highlight-pale);
  color: var(--primary-deep-sea);
}

[hidden] {
  display: none !important;
}

#main-content {
  flex: 1 0 auto;
  width: 100%;
}

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

/* ---------- 2. 设计变量 ---------- */
:root {
  --primary-deep-sea: #0B3C5D;
  --accent-coral: #FF6B35;
  --background-sand: #F4F1EA;
  --accent-tropical-green: #2A9D8F;
  --text-dark: #10313F;
  --text-light: #FFFFFF;
  --shadow-soft: #D8D2C5;
  --highlight-pale: #FFD9C7;
  --line-coast: #3F7E8F;
  --deep-ink: #0A1D2A;
  --coral-deep: #BE481C;

  --heading-font: Montserrat, Futura, "Helvetica Neue", Arial, sans-serif;
  --body-font: "Source Sans Pro", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --accent-font: Caveat, "Comic Sans MS", cursive;

  --container-max: 1200px;
  --container-narrow: 880px;
  --gutter: clamp(0.875rem, 3vw, 1.5rem);
  --radius-cut: 28px 12px 28px 12px;
  --shadow-panel: 0 12px 40px rgba(16, 49, 63, 0.07);
  --shadow-float: 0 8px 30px rgba(16, 49, 63, 0.12);
}

/* ---------- 3. 排版 ---------- */
h1,
h2,
h3,
h4 {
  font-family: var(--heading-font);
  font-weight: 700;
  line-height: 1.25;
  color: var(--primary-deep-sea);
  text-wrap: balance;
}

h1 {
  font-size: clamp(2.2rem, 5.5vw, 3.6rem);
}

h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
}

h3 {
  font-size: 1.25rem;
}

p {
  text-wrap: pretty;
}

/* ---------- 4. 布局容器 ---------- */
.container {
  width: min(calc(100% - (var(--gutter) * 2)), var(--container-max));
  margin-inline: auto;
}

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

.section-gap {
  padding-block: clamp(3rem, 8vw, 6rem);
}

/* ---------- 5. 焦点可见与无障碍 ---------- */
:focus-visible {
  outline: 3px solid var(--accent-coral);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: -5rem;
  left: 1rem;
  z-index: 9999;
  padding: 0.75rem 1.5rem;
  background: var(--primary-deep-sea);
  color: var(--text-light);
  border-radius: 0 0 999px 999px;
  font-family: var(--heading-font);
  font-weight: 600;
  font-size: 0.9375rem;
  box-shadow: 0 8px 24px rgba(10, 29, 42, 0.3);
  transition: top 0.25s ease;
}

.skip-link:focus-visible {
  top: 0;
  outline-offset: 0;
}

/* ---------- 6. 页头部 · 浮岛胶囊导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: var(--gutter) var(--gutter) 0;
  pointer-events: none;
}

.site-header__bar {
  position: relative;
  width: min(100%, var(--container-max));
  margin-inline: auto;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.5rem 1.25rem;
  padding: 0.625rem 1rem;
  background: rgba(244, 241, 234, 0.92);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border: 1px solid var(--shadow-soft);
  border-radius: 999px;
  box-shadow: var(--shadow-float);
  pointer-events: auto;
  transition: box-shadow 0.3s ease, background-color 0.3s ease, padding 0.3s ease;
}

.site-header[data-scrolled] .site-header__bar {
  background-color: rgba(244, 241, 234, 0.97);
  box-shadow: 0 12px 34px rgba(16, 49, 63, 0.16);
  padding-block: 0.5rem;
}

.site-header__progress {
  position: absolute;
  left: 1rem;
  right: 1rem;
  bottom: 0.125rem;
  height: 3px;
  border-radius: 999px;
  background: var(--accent-coral);
  transform: scaleX(0);
  transform-origin: left center;
}

/* ---------- 7. 品牌 ---------- */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.brand__sigil {
  position: relative;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary-deep-sea);
  flex-shrink: 0;
}

.brand__sigil::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 12px;
  height: 12px;
  background: var(--accent-coral);
  border-radius: 2px;
  transform: translate(-50%, -50%) rotate(45deg);
}

.brand__sigil::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 28px;
  height: 28px;
  border: 1.5px solid rgba(255, 255, 255, 0.65);
  border-top-color: transparent;
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.brand__copy {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.brand__name {
  font-family: var(--heading-font);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: 0.04em;
  color: var(--primary-deep-sea);
}

.brand__slogan {
  font-family: var(--accent-font);
  font-size: 1rem;
  color: var(--line-coast);
}

/* ---------- 8. 主导航 ---------- */
.float-nav {
  margin-inline: auto;
  pointer-events: auto;
}

.float-nav__list {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.125rem;
}

.float-nav__link {
  position: relative;
  display: block;
  padding: 0.5rem 0.875rem;
  border-radius: 999px;
  font-family: var(--heading-font);
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--text-dark);
  line-height: 1.4;
  transition: color 0.2s ease, background-color 0.2s ease;
}

.float-nav__link:hover {
  background: var(--highlight-pale);
  color: var(--primary-deep-sea);
}

.float-nav__link[aria-current="page"] {
  background: var(--primary-deep-sea);
  color: var(--text-light);
}

.site-header__actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.5rem;
}

/* ---------- 9. 按钮与标签 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.25rem;
  border-radius: 999px;
  font-family: var(--heading-font);
  font-weight: 700;
  font-size: 0.9375rem;
  line-height: 1.2;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease, color 0.2s ease;
}

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

.btn--coral {
  background: var(--accent-coral);
  color: var(--deep-ink);
  border-color: var(--accent-coral);
}

.btn--coral:hover {
  box-shadow: 0 8px 20px rgba(255, 107, 53, 0.32);
}

.btn--outline {
  background: transparent;
  color: var(--primary-deep-sea);
  border-color: var(--primary-deep-sea);
}

.btn--outline:hover {
  background: var(--primary-deep-sea);
  color: var(--text-light);
}

.btn--discover {
  position: relative;
  overflow: hidden;
}

.btn__icon {
  font-size: 1.05em;
  line-height: 1;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.3rem 0.875rem;
  border-radius: 999px;
  font-family: var(--heading-font);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  background: var(--background-sand);
  color: var(--text-dark);
  border: 1px solid var(--shadow-soft);
}

.tag--coral {
  background: var(--accent-coral);
  color: var(--deep-ink);
  border-color: var(--accent-coral);
}

.tag--green {
  background: var(--accent-tropical-green);
  color: var(--deep-ink);
  border-color: var(--accent-tropical-green);
}

.tag--sand {
  background: var(--highlight-pale);
  color: var(--primary-deep-sea);
  border-color: transparent;
}

/* ---------- 10. 移动导航按钮 ---------- */
.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  padding: 0.5rem 0.25rem 0.5rem 0.75rem;
  font-family: var(--heading-font);
  font-weight: 600;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--primary-deep-sea);
}

.nav-toggle__bars {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle__bar {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--primary-deep-sea);
  border-radius: 2px;
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.2s ease;
}

.site-header[data-nav-open="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.site-header[data-nav-open="true"] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.site-header[data-nav-open="true"] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- 11. 内页头部与目录骨架 ---------- */
.page-header {
  padding-top: clamp(2.5rem, 7vw, 5.5rem);
  padding-bottom: clamp(1.5rem, 4vw, 3rem);
}

.page-header__title {
  max-width: 22ch;
}

.page-header__intro {
  margin-top: 1rem;
  max-width: 56ch;
  font-size: clamp(1rem, 1.5vw, 1.1875rem);
  color: var(--text-dark);
}

.breadcrumb {
  margin-bottom: 1.5rem;
  font-size: 0.875rem;
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.breadcrumb__item {
  display: inline-flex;
  align-items: center;
}

.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 0.5rem;
  color: var(--line-coast);
}

.breadcrumb__link {
  color: var(--line-coast);
  transition: color 0.2s ease;
}

.breadcrumb__link:hover {
  color: var(--primary-deep-sea);
}

.breadcrumb__item[aria-current="page"] {
  color: var(--primary-deep-sea);
  font-weight: 600;
}

/* ---------- 12. 面板与分隔 ---------- */
.panel {
  background: #fff;
  border: 1px solid var(--shadow-soft);
  border-radius: var(--radius-cut);
  padding: clamp(1.5rem, 4vw, 3rem);
  box-shadow: var(--shadow-panel);
}

.panel--coral-top {
  border-top: 6px solid var(--accent-coral);
}

.panel-cut {
  clip-path: polygon(0 0, calc(100% - 32px) 0, 100% 32px, 100% 100%, 0 100%);
  background: var(--primary-deep-sea);
  color: var(--text-light);
  padding: clamp(1.5rem, 5vw, 3.5rem);
}

.panel-cut h1,
.panel-cut h2,
.panel-cut h3 {
  color: var(--text-light);
}

.coast-divider {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 2.5rem 0;
}

.coast-divider::before,
.coast-divider::after {
  content: "";
  flex: 1;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, transparent, var(--line-coast));
}

.coast-divider::after {
  background: linear-gradient(90deg, var(--line-coast), transparent);
}

.coast-divider span {
  flex-shrink: 0;
  font-family: var(--accent-font);
  font-size: 1.25rem;
  color: var(--coral-deep);
}

.util-stripes {
  position: relative;
  overflow: hidden;
}

.util-stripes::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(135deg, rgba(255, 107, 53, 0.08) 0px, rgba(255, 107, 53, 0.08) 10px, transparent 10px, transparent 24px);
  pointer-events: none;
}

/* ---------- 13. 图片容器 ---------- */
.image-frame {
  position: relative;
  min-height: 220px;
  border-radius: var(--radius-cut);
  overflow: hidden;
  display: grid;
  place-items: center;
  background:
    linear-gradient(160deg, rgba(63, 126, 143, 0.22), rgba(10, 29, 42, 0.4)),
    var(--shadow-soft);
}

.image-frame::before {
  content: "图片 / Image";
  font-family: var(--accent-font);
  font-size: 1.4rem;
  color: rgba(255, 255, 255, 0.85);
}

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

.image-frame:has(img)::before {
  content: none;
}

.image-frame--wide {
  min-height: 280px;
}

.image-frame--tall {
  min-height: 380px;
}

/* ---------- 14. 标签页、折叠面板、时间轴 ---------- */
.tabs {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 0.25rem;
  border-bottom: 2px solid var(--shadow-soft);
}

.tabs__tab {
  padding: 0.75rem 1.25rem;
  border-radius: 999px 999px 0 0;
  font-family: var(--heading-font);
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--text-dark);
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  background: transparent;
  transition: color 0.2s ease, background-color 0.2s ease;
}

.tabs__tab:hover {
  background: var(--highlight-pale);
  color: var(--primary-deep-sea);
}

.tabs__tab[aria-selected="true"] {
  color: var(--primary-deep-sea);
  border-bottom-color: var(--accent-coral);
}

.tabs__panel {
  padding-top: 1.5rem;
}

.collapse {
  background: #fff;
  border: 1px solid var(--shadow-soft);
  border-radius: 18px;
  overflow: hidden;
}

.collapse + .collapse {
  margin-top: -1px;
  border-radius: 0 0 18px 18px;
}

.collapse__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.05rem 1.25rem;
  font-family: var(--heading-font);
  font-weight: 600;
  font-size: 1rem;
  color: var(--primary-deep-sea);
  cursor: pointer;
  list-style: none;
  background: #fff;
}

.collapse__summary::-webkit-details-marker {
  display: none;
}

.collapse__summary::after {
  content: "+";
  font-size: 1.5rem;
  font-weight: 400;
  line-height: 1;
  color: var(--accent-coral);
  flex-shrink: 0;
  transition: transform 0.25s ease;
}

.collapse[open] .collapse__summary::after {
  transform: rotate(45deg);
}

.collapse__content {
  padding: 0 1.25rem 1.25rem;
  color: var(--text-dark);
}

.timeline {
  position: relative;
  padding-left: 2.25rem;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 0.375rem;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--accent-coral), var(--line-coast), var(--accent-tropical-green));
  border-radius: 2px;
}

.timeline__item {
  position: relative;
  padding-bottom: 2rem;
}

.timeline__item:last-child {
  padding-bottom: 0;
}

.timeline__item::before {
  content: "";
  position: absolute;
  left: -2.075rem;
  top: 0.35rem;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--accent-coral);
  border: 3px solid var(--background-sand);
  box-sizing: content-box;
}

/* ---------- 15. 页脚 ---------- */
.site-footer {
  position: relative;
  z-index: 1;
  margin-top: auto;
  padding: clamp(3rem, 7vw, 5rem) 0 0;
  background: var(--deep-ink);
  color: rgba(244, 241, 234, 0.82);
  border-radius: 40px 40px 0 0;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 8%;
  width: 30%;
  height: 5px;
  background: var(--accent-coral);
  border-radius: 0 0 6px 6px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.25fr;
  gap: clamp(1.5rem, 4vw, 3rem);
}

.footer-brand .brand__name {
  font-size: 1.4rem;
  color: var(--text-light);
}

.footer-brand .brand__slogan {
  color: rgba(244, 241, 234, 0.66);
}

.footer-brand__note {
  margin-top: 1.25rem;
  max-width: 34ch;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: rgba(244, 241, 234, 0.7);
}

.footer-title {
  font-family: var(--heading-font);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-coral);
  margin-bottom: 1.1rem;
}

.footer-nav__list li {
  margin-bottom: 0.5rem;
}

.footer-nav__list a {
  position: relative;
  display: inline-block;
  padding-left: 1.1rem;
  font-size: 0.9375rem;
  color: rgba(244, 241, 234, 0.82);
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.footer-nav__list a::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--accent-coral);
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.footer-nav__list a:hover {
  color: var(--text-light);
  padding-left: 1.6rem;
}

.footer-nav__list a:hover::before {
  opacity: 1;
  transform: none;
}

.footer-contact__item {
  position: relative;
  padding-left: 1.4rem;
  margin-bottom: 0.625rem;
  font-size: 0.9375rem;
  line-height: 1.6;
}

.footer-contact__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6rem;
  width: 16px;
  height: 3px;
  border-radius: 3px;
  background: var(--accent-coral);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 2rem;
  margin-top: clamp(2.5rem, 6vw, 4rem);
  padding: 1.5rem 0 2rem;
  border-top: 1px solid rgba(244, 241, 234, 0.14);
  font-size: 0.875rem;
  color: rgba(244, 241, 234, 0.65);
}

/* ---------- 16. 发现弹窗 ---------- */
.coast-dialog {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: grid;
  place-items: center;
  padding: 1.25rem;
  pointer-events: auto;
  overflow-y: auto;
}

.coast-dialog__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(10, 29, 42, 0.58);
  -webkit-backdrop-filter: blur(5px);
  backdrop-filter: blur(5px);
}

.coast-dialog__panel {
  position: relative;
  width: min(100%, 540px);
  padding: clamp(1.75rem, 5vw, 2.75rem);
  background: var(--background-sand);
  border: 2px solid var(--primary-deep-sea);
  border-radius: var(--radius-cut);
  box-shadow: 10px 10px 0 var(--accent-coral);
  animation: dialog-rise 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

@keyframes dialog-rise {
  from {
    opacity: 0;
    transform: translateY(24px) scale(0.98);
  }

  to {
    opacity: 1;
    transform: none;
  }
}

.coast-dialog__close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--shadow-soft);
  background: #fff;
  font-size: 1.4rem;
  line-height: 1;
  color: var(--primary-deep-sea);
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.coast-dialog__close:hover {
  background: var(--highlight-pale);
  transform: rotate(90deg);
}

.coast-dialog__tag {
  font-family: var(--accent-font);
  font-size: 1.3rem;
  color: var(--coral-deep);
  margin-bottom: 0.25rem;
}

.coast-dialog__title {
  font-size: 1.6rem;
  margin-bottom: 0.75rem;
}

.coast-dialog__content {
  font-size: 1.0625rem;
  line-height: 1.8;
}

.coast-dialog__hint {
  margin-top: 1.5rem;
  font-family: var(--accent-font);
  font-size: 1.125rem;
  color: var(--line-coast);
}

.coast-dialog__foot {
  display: flex;
  justify-content: flex-end;
  margin-top: 1.75rem;
}

body.is-dialog-open {
  overflow: hidden;
}

/* ---------- 17. 显现动效 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 18. 响应式 ---------- */
@media (max-width: 1080px) {
  .brand__slogan {
    display: none;
  }

  .float-nav__link {
    padding-inline: 0.7rem;
    font-size: 0.875rem;
  }

  .btn--discover {
    padding-inline: 1rem;
  }
}

@media (max-width: 960px) {
  .site-header__bar {
    grid-template-columns: auto 1fr;
  }

  .site-header__actions {
    order: 2;
  }

  .float-nav {
    position: absolute;
    top: calc(100% + 0.75rem);
    left: 0;
    right: 0;
    width: 100%;
    background: rgba(244, 241, 234, 0.98);
    border: 1px solid var(--shadow-soft);
    border-radius: 24px;
    padding: 0.5rem;
    box-shadow: 0 18px 44px rgba(10, 29, 42, 0.16);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s;
  }

  .float-nav[data-open="true"] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .float-nav__list {
    flex-direction: column;
    align-items: stretch;
  }

  .float-nav__item + .float-nav__item {
    border-top: 1px solid rgba(63, 126, 143, 0.18);
  }

  .float-nav__link {
    padding: 0.85rem 1rem;
    border-radius: 16px;
  }

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

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

@media (max-width: 640px) {
  .site-header {
    padding: 0.75rem 0.75rem 0;
  }

  .site-header__bar {
    padding: 0.5rem;
    border-radius: 26px;
  }

  .brand__name {
    font-size: 1.05rem;
  }

  .brand__sigil {
    width: 38px;
    height: 38px;
  }

  .btn--discover {
    padding: 0.6rem;
  }

  .btn--discover .btn__text {
    display: none;
  }

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

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ---------- 19. 减少动效 ---------- */
@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;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  .site-header__progress {
    display: none;
  }
}