/* ==========================================================
   江南平台APP · Site Kit
   fingerprint: 128179e44ce0dbfd
   ========================================================== */

/* ---------- 1. 变量与重置 ---------- */
:root {
  --c-bg: #0A192F;
  --c-bg-2: #112240;
  --c-bg-3: #1D2D50;
  --c-accent: #64FFDA;
  --c-accent-2: #9D4EDD;
  --c-accent-3: #00D4FF;
  --c-text: #E6F1FF;
  --c-text-dim: #8892B0;
  --c-line: #233554;
  --c-warn: #FF6B35;

  --font-title: 'Anton', 'Arial Narrow', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Inter', -apple-system, 'BlinkMacSystemFont', 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', 'Cascadia Code', Consolas, monospace;

  --container-w: 1280px;
  --header-h: 72px;
  --radius-lg: 20px;
  --radius-md: 12px;
  --radius-sm: 6px;
  --radius-pill: 999px;

  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 2rem;
  --space-4: 4rem;
  --space-5: 6rem;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --shadow: 0 8px 30px rgba(2, 12, 27, 0.55);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 120px;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--c-bg);
  background-image:
    linear-gradient(rgba(100, 255, 218, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(100, 255, 218, 0.035) 1px, transparent 1px);
  background-size: 28px 28px;
  color: var(--c-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: rgba(100, 255, 218, 0.25);
  color: var(--c-text);
}

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

figure {
  margin: 0;
}

ul, ol {
  list-style: none;
}

a {
  color: var(--c-accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--c-accent-3);
}

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

input, select, textarea {
  font-family: inherit;
  font-size: 1rem;
  color: var(--c-text);
  background: var(--c-bg-2);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.875rem;
}

input:focus-visible,
select:focus-visible,
textarea:focus-visible,
button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: 2px;
  border-radius: 3px;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-title);
  line-height: 1.25;
  color: var(--c-text);
  font-weight: 700;
  text-wrap: balance;
}

h1 {
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  letter-spacing: 0.02em;
}

h3 {
  font-size: clamp(1.15rem, 2vw, 1.5rem);
}

p {
  text-wrap: pretty;
}

hr {
  border: none;
  border-top: 1px solid var(--c-line);
  margin-block: var(--space-3);
}

::placeholder {
  color: var(--c-text-dim);
  opacity: 0.7;
}

/* ---------- 2. 通用布局 ---------- */
.container {
  width: min(var(--container-w), 100% - 48px);
  margin-inline: auto;
}

.container--narrow {
  width: min(840px, 100% - 48px);
  margin-inline: auto;
}

.section {
  padding-block: var(--space-4);
}

.section--flush-top {
  padding-top: 0;
}

main {
  display: block;
  min-height: 72vh;
}

main#main-content {
  scroll-margin-top: calc(16px + var(--header-h) + var(--space-3));
}

body.prevent-scroll {
  overflow: hidden;
}

/* ---------- 3. 跳过链接 ---------- */
.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 3000;
  background: var(--c-accent);
  color: var(--c-bg);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm);
  transform: translateY(-220%);
  transition: transform 0.3s var(--ease);
}

.skip-link:focus {
  transform: translateY(0);
  outline: 2px solid var(--c-text);
  outline-offset: 2px;
}

/* ---------- 4. 头部 ---------- */
.site-header {
  position: fixed;
  top: 16px;
  left: 0;
  right: 0;
  z-index: 1000;
}

.header-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  width: min(var(--container-w), 100% - 32px);
  height: var(--header-h);
  margin-inline: auto;
  padding: 0 var(--space-2);
  background: rgba(10, 25, 47, 0.82);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  position: relative;
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.header-shell::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 32px;
  width: 56px;
  height: 2px;
  background: linear-gradient(90deg, var(--c-accent-2), var(--c-accent));
  border-radius: 2px;
}

/* 品牌 */
.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
  margin-right: var(--space-1);
}

.brand-mark {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  line-height: 1;
  color: var(--c-accent);
  background: rgba(100, 255, 218, 0.06);
  border: 1px solid rgba(100, 255, 218, 0.25);
  border-radius: 5px;
  padding: 0.3rem 0.5rem;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.brand-name {
  font-family: var(--font-title);
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--c-text);
  white-space: nowrap;
}

.brand-name em {
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 0.72em;
  font-weight: 600;
  color: var(--c-accent);
  letter-spacing: 0;
  vertical-align: 2px;
}

/* 导航 */
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin-inline: auto;
}

.nav-link {
  display: inline-block;
  position: relative;
  padding: 0.55rem 0.875rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--c-text-dim);
  border-radius: var(--radius-pill);
  white-space: nowrap;
  transition: color 0.2s ease, background 0.2s ease;
}

.nav-link:hover {
  color: var(--c-text);
  background: rgba(100, 255, 218, 0.07);
}

.nav-link[aria-current="page"] {
  color: var(--c-accent);
  background: rgba(100, 255, 218, 0.11);
  box-shadow: inset 0 0 0 1px rgba(100, 255, 218, 0.18);
}

/* 头部操作区 */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.nav-cta {
  white-space: nowrap;
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: transparent;
  transition: background 0.2s ease;
}

.nav-toggle:hover {
  background: rgba(100, 255, 218, 0.06);
}

.nav-toggle-line {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--c-text);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.3s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* 滚动进度条 */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 2000;
  background: linear-gradient(90deg, var(--c-accent-2), var(--c-accent-3), var(--c-accent));
  transform-origin: left center;
  transform: scaleX(0);
  pointer-events: none;
}

/* ---------- 5. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  font-family: var(--font-body);
  line-height: 1.4;
  padding: 0.625rem 1.5rem;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.25s var(--ease);
  white-space: nowrap;
}

.btn--accent {
  background: var(--c-accent);
  color: var(--c-bg);
  box-shadow: 0 4px 18px rgba(100, 255, 218, 0.25);
}

.btn--accent:hover {
  background: #7FFFE4;
  color: var(--c-bg);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(100, 255, 218, 0.35);
}

.btn--accent:active {
  transform: translateY(0);
  box-shadow: 0 2px 10px rgba(100, 255, 218, 0.2);
}

.btn--outline {
  background: transparent;
  color: var(--c-accent);
  border-color: var(--c-accent);
}

.btn--outline:hover {
  background: rgba(100, 255, 218, 0.08);
  transform: translateY(-2px);
}

/* ---------- 6. 页脚 ---------- */
.site-footer {
  background: var(--c-bg-2);
  border-top: 1px solid var(--c-line);
  position: relative;
  overflow: hidden;
  margin-top: var(--space-5);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-accent-2), var(--c-accent-3), var(--c-accent), transparent);
}

.site-footer::after {
  content: "";
  position: absolute;
  right: -80px;
  bottom: -120px;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(157, 78, 221, 0.14), transparent 70%);
  pointer-events: none;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.3fr;
  gap: var(--space-4);
  padding-block: var(--space-5) var(--space-4);
}

.footer-logo {
  font-family: var(--font-title);
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.04em;
  color: var(--c-text);
  margin-bottom: var(--space-2);
}

.footer-logo em {
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 0.7em;
  font-weight: 600;
  color: var(--c-accent);
  vertical-align: 2px;
}

.footer-desc {
  color: var(--c-text);
  font-size: 0.9rem;
  margin-bottom: 0.75rem;
  line-height: 1.7;
}

.footer-trust {
  color: var(--c-text-dim);
  font-size: 0.8rem;
  line-height: 1.7;
  max-width: 32em;
}

.footer-col {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.4rem;
}

.footer-title {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: 0.6rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--c-line);
  width: 100%;
}

.footer-link {
  display: inline-block;
  color: var(--c-text-dim);
  font-size: 0.875rem;
  line-height: 1.6;
  transition: color 0.2s ease, padding-left 0.2s ease, border-color 0.2s;
  border-bottom: 1px solid transparent;
}

.footer-link:hover {
  color: var(--c-accent);
  padding-left: 4px;
  border-bottom-color: rgba(100, 255, 218, 0.3);
}

.footer-text {
  color: var(--c-text-dim);
  font-size: 0.82rem;
  line-height: 1.65;
  margin: 0.15rem 0;
}

.footer-bottom {
  border-top: 1px solid var(--c-line);
  padding-block: var(--space-2);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--c-text-dim);
  position: relative;
  z-index: 1;
}

.footer-copy {
  font-family: inherit;
  color: inherit;
}

.footer-meta {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-family: inherit;
  color: inherit;
}

.footer-icp {
  font-family: var(--font-mono);
  color: var(--c-text-dim);
  border-bottom: 1px dashed var(--c-line);
  padding-bottom: 2px;
}

/* ---------- 7. 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.625rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--c-text-dim);
  padding: var(--space-2) 0;
}

.breadcrumb a {
  color: var(--c-text-dim);
  transition: color 0.2s ease;
}

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

.breadcrumb a::after {
  content: "/";
  color: var(--c-line);
  margin-left: 0.625rem;
}

.breadcrumb [aria-current="page"] {
  color: var(--c-accent);
}

/* ---------- 8. 章节组件 ---------- */
.section-title {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  position: relative;
  padding-left: 1rem;
  margin-bottom: 0.75rem;
}

.section-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.1em;
  width: 4px;
  height: 0.9em;
  background: linear-gradient(180deg, var(--c-accent-2), var(--c-accent));
  border-radius: 2px;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--c-text-dim);
  margin-bottom: var(--space-3);
  max-width: 48em;
}

.coord-label {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-text-dim);
  margin-bottom: var(--space-2);
}

.coord-label::before {
  content: "";
  display: block;
  width: 2rem;
  height: 1px;
  background: linear-gradient(90deg, var(--c-accent-2), var(--c-accent));
}

/* ---------- 9. 标签与筛选晶片 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-text-dim);
  background: var(--c-bg-2);
  border: 1px solid var(--c-line);
  border-radius: 4px;
  padding: 0.25rem 0.625rem;
  line-height: 1.5;
  white-space: nowrap;
}

.tag--purple {
  color: #C77DFF;
  border-color: rgba(157, 78, 221, 0.4);
  background: rgba(157, 78, 221, 0.1);
}

.tag--green {
  color: var(--c-accent);
  border-color: rgba(100, 255, 218, 0.3);
  background: rgba(100, 255, 218, 0.07);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.4rem 1.125rem;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--c-text-dim);
  background: var(--c-bg-2);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-pill);
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s var(--ease);
}

.chip:hover {
  color: var(--c-text);
  border-color: var(--c-accent);
  transform: translateY(-1px);
}

.chip[aria-pressed="true"] {
  color: var(--c-accent);
  border-color: var(--c-accent);
  background: rgba(100, 255, 218, 0.1);
  box-shadow: inset 0 0 0 1px rgba(100, 255, 218, 0.35);
}

.chip[data-count]::after {
  content: attr(data-count);
  font-family: var(--font-mono);
  font-size: 0.7em;
  color: var(--c-text-dim);
  background: var(--c-bg-3);
  border-radius: var(--radius-pill);
  padding: 0.1rem 0.4rem;
  margin-left: 0.2rem;
}

/* ---------- 10. 卡片 ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-3);
}

.data-card {
  position: relative;
  display: block;
  background: var(--c-bg-2);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  padding: var(--space-3);
  overflow: hidden;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), border-color 0.3s ease;
}

.data-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--c-accent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.data-card:hover {
  transform: translateY(-5px);
  border-color: rgba(100, 255, 218, 0.35);
  box-shadow: 0 14px 40px rgba(2, 12, 27, 0.5);
}

.data-card:hover::before {
  opacity: 1;
}

.data-card--purple::before {
  background: var(--c-accent-2);
}

.data-card--purple:hover {
  border-color: rgba(157, 78, 221, 0.4);
}

.data-card__label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--c-text-dim);
  margin-bottom: 0.75rem;
}

.data-card__value {
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--c-accent);
  line-height: 1.2;
  margin-bottom: 0.35rem;
  font-variant-numeric: tabular-nums;
}

.data-card__desc {
  color: var(--c-text-dim);
  font-size: 0.84rem;
  line-height: 1.6;
}

/* ---------- 11. 图像占位容器 ---------- */
.img-frame {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--c-bg-2);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-md);
  aspect-ratio: 16 / 9;
}

.img-frame::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--c-accent), transparent);
  opacity: 0.45;
  pointer-events: none;
}

.img-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(0.35) contrast(1.05);
  transition: filter 0.4s ease, transform 0.7s var(--ease);
}

.img-frame:hover img {
  filter: grayscale(0) contrast(1);
  transform: scale(1.04);
}

.img-frame--wide {
  aspect-ratio: 21 / 9;
}

.img-frame--tall {
  aspect-ratio: 3 / 4;
}

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

.img-frame[data-caption]::before {
  content: attr(data-caption);
  position: absolute;
  bottom: 0.5rem;
  left: 0.75rem;
  z-index: 1;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  color: var(--c-accent);
  background: rgba(10, 25, 47, 0.75);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  pointer-events: none;
}

/* ---------- 12. 数据表 ---------- */
.table-scan {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
  background: var(--c-bg-2);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-md);
}

.table-scan th {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-text-dim);
  border-bottom: 1px solid var(--c-line);
  padding: 0.875rem 1rem;
  text-align: left;
  white-space: nowrap;
}

.table-scan td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid rgba(35, 53, 84, 0.5);
  color: var(--c-text);
}

.table-scan tbody tr:last-child td {
  border-bottom: none;
}

.table-scan tbody tr {
  transition: background 0.2s ease;
}

.table-scan tbody tr:hover {
  background: rgba(100, 255, 218, 0.045);
}

.table-scan .num {
  font-family: var(--font-mono);
  color: var(--c-accent);
  font-variant-numeric: tabular-nums;
}

/* ---------- 13. 滚动显现 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s var(--ease), transform 0.65s var(--ease);
}

[data-reveal="visible"] {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 14. 响应式 ---------- */
@media (max-width: 1100px) {
  .nav-link {
    padding: 0.5rem 0.625rem;
    font-size: 0.83rem;
  }

  .brand-name {
    font-size: 1.2rem;
  }

  .footer-top {
    grid-template-columns: 1.5fr 1fr 1fr;
  }

  .footer-col--contact {
    grid-column: span 3;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  }

  .footer-col--contact .footer-text {
    margin-bottom: 0.2rem;
  }
}

@media (max-width: 960px) {
  .nav-toggle {
    display: flex;
  }

  .nav-cta {
    display: none;
  }

  .nav-links {
    position: fixed;
    top: calc(16px + var(--header-h) + 10px);
    left: 16px;
    right: 16px;
    z-index: 1500;
    background: rgba(10, 25, 47, 0.97);
    -webkit-backdrop-filter: blur(24px);
    backdrop-filter: blur(24px);
    border: 1px solid var(--c-line);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow);
    padding: 0.75rem;
    margin-inline: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-18px) scale(0.98);
    transition: opacity 0.3s var(--ease), transform 0.3s var(--ease), visibility 0s linear 0.3s;
  }

  .nav-links[data-open] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
    transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
  }

  .nav-link {
    display: block;
    padding: 0.85rem 1rem;
    font-size: 0.95rem;
    border-radius: var(--radius-sm);
  }

  .nav-link[aria-current="page"] {
    color: var(--c-accent);
    background: rgba(100, 255, 218, 0.1);
    box-shadow: none;
  }

  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
  }

  .footer-col--contact {
    grid-column: span 2;
    display: block;
  }

  .footer-brand {
    grid-column: span 2;
  }
}

@media (max-width: 600px) {
  .container {
    width: 100% - 32px;
  }

  .header-shell {
    width: calc(100% - 20px);
    height: 64px;
    padding: 0 0.75rem;
  }

  .brand-mark {
    display: none;
  }

  .brand-name {
    font-size: 1.1rem;
  }

  .scroll-progress {
    height: 2px;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: var(--space-3);
    padding-block: var(--space-4) var(--space-3);
  }

  .footer-brand {
    grid-column: span 1;
  }

  .footer-col--contact {
    grid-column: span 1;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.375rem;
    font-size: 0.7rem;
  }

  .breadcrumb {
    font-size: 0.72rem;
    gap: 0.375rem;
  }

  .card-grid {
    gap: var(--space-2);
  }

  .data-card {
    padding: var(--space-2);
  }
}

/* ---------- 15. 动效安全 ---------- */
@supports (backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px)) {
  .header-shell,
  .nav-links {
    -webkit-backdrop-filter: blur(24px);
    backdrop-filter: blur(24px);
  }
}

@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;
    transition-delay: 0s !important;
  }

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

  .scroll-progress {
    transform: none;
    opacity: 0.6;
  }

  .btn--accent:hover,
  .data-card:hover,
  .chip:hover {
    transform: none;
  }
}

/* ---------- 16. 滚动条 ---------- */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--c-line) transparent;
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--c-bg);
}

::-webkit-scrollbar-thumb {
  background: var(--c-line);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--c-accent-2);
}