/* ===== 1. 变量 ===== */
:root {
  --color-ink: #0B0F14;
  --color-ink-2: #11161D;
  --color-paper: #F4F1EA;
  --color-blue: #1FB6FF;
  --color-green: #B6FF3C;
  --color-orange: #FF6A00;
  --color-slate: #8B98A9;
  --color-glass: #1C242E;
  --color-line: #2F3A46;
  --color-success: #37D399;
  --color-blue-deep: #0873B8;
  --color-orange-deep: #C34E00;
  --font-display: "Archivo Black", "Arial Black", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Inter", -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --header-w: 280px;
  --r-lg: 24px;
  --r-md: 16px;
  --r-sm: 10px;
  --shadow-1: 0 4px 24px rgba(0, 0, 0, 0.25);
  --shadow-2: 0 12px 40px rgba(0, 0, 0, 0.4);
  --ease: cubic-bezier(0.2, 0.6, 0.2, 1);
}

/* ===== 2. Reset / Base ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
}

* {
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scrollbar-color: var(--color-line) var(--color-ink);
}

body {
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-slate);
  background: var(--color-ink);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

@media (min-width: 1025px) {
  body {
    margin-left: var(--header-w);
  }
}

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

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

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

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

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

p {
  overflow-wrap: break-word;
}

::selection {
  background: var(--color-blue);
  color: var(--color-ink);
}

h1,
h2,
h3,
h4,
h5 {
  font-family: var(--font-display);
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--color-paper);
}

strong {
  color: var(--color-paper);
  font-weight: 700;
}

main[id="main-content"] {
  min-height: 70vh;
  scroll-margin-top: 90px;
}

section[id] {
  scroll-margin-top: 90px;
}

section[id] {
  scroll-margin-top: 90px;
}

/* ===== 3. 通用工具 ===== */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 2000;
  padding: 10px 20px;
  border-radius: 999px;
  background: var(--color-blue);
  color: var(--color-ink);
  font-size: 14px;
  font-weight: 700;
  transition: top 0.2s var(--ease);
}

.skip-link:focus {
  top: 16px;
}

/* ===== 4. 滚动进度条 ===== */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 3px;
  z-index: 1600;
  pointer-events: none;
  background: linear-gradient(90deg, var(--color-blue) 0%, var(--color-green) 55%, var(--color-orange) 100%);
}

/* ===== 5. 头部 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1200;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  padding: 12px 16px;
  background: linear-gradient(180deg, var(--color-ink) 0%, #0C1117 60%, var(--color-ink) 100%);
  border-bottom: 1px solid var(--color-line);
}

.brand-lockup {
  order: 1;
  flex: 1;
  min-width: 0;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  display: grid;
  place-items: center;
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 13px;
  background: linear-gradient(135deg, var(--color-blue) 0%, var(--color-green) 100%);
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 900;
  font-style: italic;
  transform: skewX(-6deg);
  box-shadow: 0 4px 16px rgba(31, 182, 255, 0.25);
}

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

.brand-name {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--color-paper);
}

.brand-tagline {
  margin-top: 2px;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--color-slate);
}

.nav-toggle {
  order: 2;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--color-glass);
  border: 1px solid var(--color-line);
  color: var(--color-paper);
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease), background 0.2s var(--ease);
}

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

.nav-toggle-box {
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 16px;
}

.nav-toggle-line {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}

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

.nav-toggle-text {
  font-size: 13px;
}

.site-nav {
  display: none;
  order: 3;
}

.site-header[data-open] .site-nav {
  display: block;
}

.nav-title {
  margin-bottom: 8px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-slate);
}

.nav-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-item {
  list-style: none;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 9px 12px;
  border-radius: 12px;
  color: var(--color-slate);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.4;
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}

.nav-index {
  min-width: 18px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  font-variant-numeric: tabular-nums;
  color: var(--color-slate);
  transition: color 0.2s var(--ease);
}

.nav-label {
  flex: 1;
}

.nav-link::after {
  content: "→";
  font-size: 13px;
  color: var(--color-blue);
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity 0.2s var(--ease), transform 0.2s var(--ease);
}

.nav-link:hover {
  background: var(--color-glass);
  color: var(--color-paper);
}

.nav-link:hover .nav-index {
  color: var(--color-blue);
}

.nav-link:hover::after {
  opacity: 1;
  transform: translateX(0);
}

.nav-link[aria-current="page"] {
  background: linear-gradient(90deg, rgba(31, 182, 255, 0.16), rgba(31, 182, 255, 0.02) 85%);
  color: var(--color-paper);
  box-shadow: inset 3px 0 0 var(--color-blue);
}

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

.header-footer {
  display: none;
  order: 4;
}

.header-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  border-radius: 999px;
  background: var(--color-glass);
  border: 1px solid var(--color-line);
  color: var(--color-slate);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-green);
  box-shadow: 0 0 0 0 rgba(182, 255, 60, 0.5);
  animation: status-pulse 2.6s ease-out infinite;
}

@keyframes status-pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(182, 255, 60, 0.5);
  }
  70% {
    box-shadow: 0 0 0 7px rgba(182, 255, 60, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(182, 255, 60, 0);
  }
}

.header-desc {
  margin-top: 10px;
  font-size: 11px;
  letter-spacing: 0.08em;
  line-height: 1.5;
  color: var(--color-slate);
}

/* ===== 6. 头部响应式 ===== */
@media (max-width: 1024px) {
  .brand-tagline {
    display: none;
  }

  .site-header[data-open] .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 1100;
    max-height: calc(100vh - 100%);
    overflow-y: auto;
    padding: 12px 16px 20px;
    background: var(--color-ink);
    border-bottom: 1px solid var(--color-line);
    box-shadow: var(--shadow-2);
  }

  .header-footer {
    display: none;
  }
}

@media (min-width: 1025px) {
  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--header-w);
    height: 100vh;
    height: 100dvh;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 32px 24px 28px;
    border-bottom: none;
    border-right: 1px solid var(--color-line);
    background: linear-gradient(180deg, #0A0E13 0%, #0D131A 50%, #090D12 100%);
  }

  .brand-lockup {
    flex: initial;
  }

  .site-nav {
    display: block;
    flex: 1;
    margin-top: 42px;
  }

  .nav-toggle {
    display: none;
  }

  .header-footer {
    display: block;
    margin-top: auto;
  }
}

/* ===== 7. 页脚 ===== */
.site-footer {
  padding: 56px 24px 32px;
  background: linear-gradient(180deg, var(--color-ink-2) 0%, var(--color-ink) 100%);
  border-top: 1px solid var(--color-line);
}

.footer-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

@media (min-width: 640px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1.6fr 0.8fr 1fr 1.4fr;
    gap: 48px;
  }
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 800;
  color: var(--color-paper);
}

.footer-mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 13px;
  background: linear-gradient(135deg, var(--color-blue) 0%, var(--color-green) 100%);
  color: var(--color-ink);
  font-size: 20px;
  font-weight: 900;
  font-style: italic;
  transform: skewX(-6deg);
  box-shadow: 0 4px 16px rgba(31, 182, 255, 0.2);
}

.footer-desc {
  max-width: 320px;
  margin-top: 14px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-slate);
}

.footer-title {
  margin-bottom: 16px;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-paper);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-link {
  display: inline-block;
  font-size: 14px;
  color: var(--color-slate);
  transition: color 0.2s var(--ease), transform 0.2s var(--ease);
}

.footer-link:hover {
  color: var(--color-blue);
  transform: translateX(2px);
}

.footer-line {
  margin-bottom: 6px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-slate);
}

.footer-bottom {
  max-width: 1200px;
  margin: 48px auto 0;
  padding-top: 24px;
  border-top: 1px solid var(--color-line);
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  align-items: center;
  justify-content: space-between;
}

.footer-icp {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--color-slate);
}

.footer-trust {
  flex-basis: 100%;
  max-width: 720px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--color-slate);
}

@media (min-width: 768px) {
  .footer-trust {
    flex: 1;
    flex-basis: auto;
  }
}

.footer-copyright {
  font-size: 12px;
  color: var(--color-slate);
}

/* ===== 8. 布局容器 ===== */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

@media (min-width: 768px) {
  .container {
    padding: 0 40px;
  }
}

@media (min-width: 1025px) {
  .container {
    padding: 0 56px;
  }
}

.section {
  padding: 72px 0;
}

@media (min-width: 768px) {
  .section {
    padding: 96px 0;
  }
}

/* ===== 9. 文字组件 ===== */
.display-title {
  font-family: var(--font-display);
  font-size: clamp(40px, 6vw, 64px);
  font-weight: 900;
  font-style: italic;
  line-height: 0.95;
  letter-spacing: -0.03em;
  color: var(--color-paper);
  text-wrap: balance;
}

.eyebrow {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-style: italic;
  color: var(--color-blue);
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
  margin-bottom: 32px;
}

.section-head .eyebrow {
  flex-basis: 100%;
}

.index-label {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  font-style: italic;
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
  color: var(--color-blue);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(26px, 3vw, 32px);
  font-weight: 800;
  font-style: italic;
  letter-spacing: -0.02em;
  color: var(--color-paper);
}

/* ===== 10. 卡片与面板 ===== */
.data-card {
  position: relative;
  padding: 24px;
  border-radius: var(--r-lg);
  background: var(--color-glass);
  border: 1px solid var(--color-line);
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease), transform 0.25s var(--ease);
}

.data-card:hover {
  border-color: var(--color-blue);
  background: #212B36;
  transform: translateY(-2px);
}

.data-card[data-live="true"] {
  border-color: rgba(182, 255, 60, 0.35);
}

.card-title {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
  font-style: italic;
  color: var(--color-paper);
}

.panel-paper {
  padding: 40px;
  border-radius: 28px;
  background: var(--color-paper);
  color: var(--color-ink);
  box-shadow: var(--shadow-2);
}

.panel-paper h1,
.panel-paper h2,
.panel-paper h3,
.panel-paper h4,
.panel-paper h5,
.panel-paper .display-title,
.panel-paper .section-title,
.panel-paper .card-title,
.panel-paper strong {
  color: var(--color-ink);
}

.panel-paper p {
  color: var(--color-ink);
  opacity: 0.82;
}

.panel-paper .eyebrow {
  color: var(--color-blue-deep);
}

.panel-paper .btn-ghost {
  color: var(--color-ink);
  border-color: rgba(11, 15, 20, 0.3);
}

.panel-paper .btn-ghost:hover {
  border-color: var(--color-blue-deep);
  color: var(--color-blue-deep);
}

.panel-paper .btn-primary {
  color: var(--color-ink);
}

.panel-paper .tag {
  background: rgba(11, 15, 20, 0.08);
  border-color: rgba(11, 15, 20, 0.16);
  color: var(--color-ink);
}

.panel-paper .tag-live {
  background: var(--color-green);
  border-color: transparent;
  color: var(--color-ink);
}

.panel-paper .pill-blue {
  background: var(--color-blue);
  border-color: transparent;
  color: var(--color-ink);
}

.panel-paper .pill-orange {
  background: var(--color-orange);
  border-color: transparent;
  color: var(--color-ink);
}

.panel-paper .media-cap {
  color: var(--color-ink);
  opacity: 0.6;
}

.panel-dark {
  padding: 40px;
  border-radius: 28px;
  background: var(--color-ink-2);
  border: 1px solid var(--color-line);
}

.panel-dark .section-title {
  color: var(--color-paper);
}

/* ===== 11. 标签 / 胶囊 ===== */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  background: rgba(31, 182, 255, 0.1);
  border: 1px solid rgba(31, 182, 255, 0.25);
  color: var(--color-blue);
}

.tag-live {
  background: rgba(182, 255, 60, 0.1);
  border-color: rgba(182, 255, 60, 0.3);
  color: var(--color-green);
}

.tag-live::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--color-green);
  animation: dot-blink 1.8s ease-in-out infinite;
}

@keyframes dot-blink {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.35;
  }
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  line-height: 1;
}

.pill-blue {
  background: rgba(31, 182, 255, 0.1);
  border: 1px solid rgba(31, 182, 255, 0.3);
  color: var(--color-blue);
}

.pill-orange {
  background: rgba(255, 106, 0, 0.12);
  border: 1px solid rgba(255, 106, 0, 0.3);
  color: var(--color-orange);
}

/* ===== 12. 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 999px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.btn-primary {
  background: var(--color-orange);
  color: var(--color-ink);
  font-weight: 700;
}

.btn-primary:hover {
  background: #FF7A1F;
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  border-color: var(--color-line);
  color: var(--color-paper);
}

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

/* ===== 13. 图片容器 ===== */
.media {
  position: relative;
  overflow: hidden;
  border-radius: 20px;
  background-color: var(--color-glass);
  background-image: repeating-linear-gradient(45deg, transparent 0 12px, rgba(139, 152, 169, 0.06) 12px 13px);
  border: 1px solid var(--color-line);
}

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

.media--16x9 {
  aspect-ratio: 16 / 9;
}

.media--4x3 {
  aspect-ratio: 4 / 3;
}

.media--3x2 {
  aspect-ratio: 3 / 2;
}

.media--1x1 {
  aspect-ratio: 1 / 1;
}

.media-cap {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-top: 10px;
  font-size: 13px;
  color: var(--color-slate);
}

.media-cap::before {
  content: "";
  flex-shrink: 0;
  align-self: center;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-blue);
}

/* ===== 14. 展览标签与装饰条 ===== */
.plate {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  border-radius: 14px;
  background: var(--color-glass);
  border: 1px solid var(--color-line);
  font-size: 13px;
  color: var(--color-slate);
}

.plate-index {
  font-family: var(--font-display);
  font-weight: 700;
  font-style: italic;
  color: var(--color-blue);
}

.cut-band {
  display: block;
  height: 4px;
  border: none;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--color-blue) 0%, var(--color-green) 55%, var(--color-orange) 100%);
  transform: skewX(-15deg);
  transform-origin: left center;
}

/* ===== 15. 栅格 ===== */
.grid {
  display: grid;
  gap: 24px;
}

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

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

@media (min-width: 640px) {
  .grid--2 {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 1000px) {
  .grid--2 {
    grid-template-columns: 1fr 1fr;
  }

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

/* ===== 16. 焦点与动效降级 ===== */
:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 3px;
  border-radius: 4px;
}

@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;
  }

  .status-dot,
  .tag-live::before {
    animation: none;
  }

  .data-card:hover,
  .btn-primary:hover,
  .btn-ghost:hover {
    transform: none;
  }

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