/* ============ 基础与变量 ============ */
:root {
  --bg-deep: #0B0F19;
  --panel-light: #F2F5F8;
  --accent-mint: #00E5A0;
  --accent-violet: #8C7CFF;
  --accent-amber: #FFCB47;
  --pitch-green: #1B4D3E;
  --border-steel: #3A4152;
  --text-bright: #E6EAF2;
  --text-dim: #9CA3B2;
  --error-red: #FF4D4F;
  --font-title: "Archivo", "Noto Sans SC", -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", -apple-system, "Segoe UI", sans-serif;
  --font-data: "JetBrains Mono", "SF Mono", "Cascadia Mono", Consolas, "Liberation Mono", monospace;
  --rail-w: 232px;
  --topbar-h: 64px;
  --shadow-panel: 8px 8px 0 rgba(0, 0, 0, 0.28);
}

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

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

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-bright);
  background-color: var(--bg-deep);
  background-image:
    linear-gradient(rgba(27, 77, 62, 0.13) 1px, transparent 1px),
    linear-gradient(90deg, rgba(27, 77, 62, 0.13) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  margin: 0 0 0.5em;
  font-family: var(--font-title);
  font-weight: 800;
  line-height: 1.15;
  color: var(--text-bright);
}

p { margin: 0 0 1em; }
ul, ol { padding-left: 1.5em; }
dd { margin: 0; }

a { color: var(--accent-mint); }

:focus-visible {
  outline: 3px solid var(--accent-mint);
  outline-offset: 2px;
  box-shadow: 0 0 0 6px rgba(0, 229, 160, 0.18);
}

::selection {
  background: var(--accent-mint);
  color: var(--bg-deep);
}

/* ============ 跳过链接 ============ */
.skip-link {
  position: absolute;
  top: -48px;
  left: 16px;
  z-index: 50;
  padding: 10px 18px;
  background: var(--accent-mint);
  color: var(--bg-deep);
  border: 2px solid var(--text-bright);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
  pointer-events: auto;
  transition: top 0.18s ease;
}

.skip-link:focus {
  top: 12px;
}

/* ============ 阅读进度 ============ */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 3px;
  z-index: 2000;
  background: linear-gradient(90deg, var(--accent-mint), var(--accent-violet));
  box-shadow: 0 0 10px rgba(0, 229, 160, 0.5);
  pointer-events: none;
  transition: width 0.08s linear;
}

/* ============ 头部框架 ============ */
.site-header {
  position: fixed;
  inset: 0;
  z-index: 1000;
  pointer-events: none;
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(4, 6, 12, 0.72);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.22s ease, visibility 0.22s ease;
  pointer-events: none;
  z-index: 1;
}

.site-header[data-nav-open]::before {
  opacity: 1;
  visibility: visible;
}

.header-topbar {
  position: absolute;
  top: 0;
  left: var(--rail-w);
  right: 0;
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 0 32px;
  background: var(--bg-deep);
  border-bottom: 2px solid var(--border-steel);
  z-index: 2;
  pointer-events: auto;
}

.header-topbar::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 132px;
  height: 2px;
  background: var(--accent-mint);
}

/* 品牌锁扣 */
.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-mark {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  flex: 0 0 40px;
  background: var(--bg-deep);
  border: 2px solid var(--accent-mint);
  box-shadow: 4px 4px 0 rgba(0, 229, 160, 0.22);
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: -0.02em;
  color: var(--accent-mint);
}

.brand-mark::after {
  content: "";
  position: absolute;
  left: 4px;
  right: 4px;
  bottom: 3px;
  height: 2px;
  background: var(--accent-violet);
}

.brand-name {
  font-family: var(--font-title);
  font-weight: 800;
  font-size: 21px;
  letter-spacing: 0.05em;
  color: var(--text-bright);
  white-space: nowrap;
}

/* 顶部信号 */
.topbar-signal {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-left: auto;
}

.live-signal {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  background: rgba(0, 229, 160, 0.06);
  border: 1px solid var(--border-steel);
}

.signal-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-mint);
  animation: signal-pulse 2.4s ease-in-out infinite;
}

@keyframes signal-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(0, 229, 160, 0.5); }
  50% { box-shadow: 0 0 0 7px rgba(0, 229, 160, 0); }
}

.signal-text {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--text-bright);
}

.signal-divider {
  width: 1px;
  height: 22px;
  background: var(--border-steel);
}

.signal-contact {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}

.signal-contact:hover {
  color: var(--accent-amber);
  border-bottom-color: var(--accent-amber);
}

/* 移动导航开关 */
.nav-toggle {
  display: none;
  position: absolute;
  top: 12px;
  right: 16px;
  z-index: 3;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  background: var(--bg-deep);
  border: 1px solid var(--border-steel);
  cursor: pointer;
  pointer-events: auto;
}

.toggle-lines {
  display: flex;
  flex-direction: column;
  gap: 5px;
  align-items: center;
}

.toggle-line {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--accent-mint);
  transition: transform 0.2s ease, opacity 0.2s ease, background-color 0.2s ease;
}

.toggle-label {
  font-family: var(--font-data);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--text-bright);
}

.nav-toggle.is-active .toggle-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.is-active .toggle-line:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-active .toggle-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* 左侧框架导航 */
.site-nav {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--rail-w);
  display: flex;
  flex-direction: column;
  background: var(--bg-deep);
  border-right: 2px solid var(--border-steel);
  overflow-y: auto;
  z-index: 2;
  pointer-events: auto;
}

.site-nav::before {
  content: "";
  position: absolute;
  top: 10px;
  right: 10px;
  width: 18px;
  height: 18px;
  border-top: 2px solid var(--accent-violet);
  border-right: 2px solid var(--accent-violet);
  opacity: 0.55;
}

.site-nav::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 6px;
  background: repeating-linear-gradient(90deg, var(--pitch-green) 0 14px, transparent 14px 28px);
  opacity: 0.4;
}

.site-nav::-webkit-scrollbar { width: 5px; }
.site-nav::-webkit-scrollbar-thumb { background: var(--border-steel); }

.rail-masthead {
  padding: 22px 20px 14px;
  border-bottom: 1px solid var(--border-steel);
  background: linear-gradient(135deg, rgba(0, 229, 160, 0.07), transparent 56%);
}

.rail-label {
  display: block;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--accent-violet);
  text-transform: uppercase;
}

.rail-index {
  display: block;
  margin-top: 4px;
  font-family: var(--font-data);
  font-size: 11px;
  color: var(--text-dim);
}

.nav-list {
  list-style: none;
  margin: 0;
  padding: 10px 0;
}

.nav-item { margin: 0; }

.nav-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 20px;
  color: var(--text-dim);
  text-decoration: none;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.04em;
  border-left: 3px solid transparent;
  transition: color 0.15s, background-color 0.15s, border-color 0.15s;
}

.nav-link::before {
  content: attr(data-index);
  font-family: var(--font-data);
  font-size: 11px;
  font-weight: 500;
  color: var(--accent-violet);
  opacity: 0.65;
}

.nav-link:hover {
  color: var(--text-bright);
  background-color: rgba(0, 229, 160, 0.06);
  border-left-color: var(--accent-mint);
}

.nav-link[aria-current="page"] {
  color: var(--text-bright);
  background: linear-gradient(90deg, rgba(0, 229, 160, 0.13), transparent 70%);
  border-left-color: var(--accent-mint);
}

.nav-link[aria-current="page"]::after {
  content: "";
  width: 6px;
  height: 6px;
  margin-left: auto;
  border-radius: 50%;
  background: var(--accent-mint);
  box-shadow: 0 0 10px rgba(0, 229, 160, 0.8);
}

.rail-foot {
  margin-top: auto;
  padding: 18px 20px 22px;
  border-top: 1px solid var(--border-steel);
}

.rail-trust {
  display: block;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--accent-mint);
}

.rail-phone {
  display: block;
  margin-top: 6px;
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.15s;
}

.rail-phone:hover { color: var(--accent-amber); }

/* ============ 页脚 ============ */
.site-footer {
  position: relative;
  margin-left: var(--rail-w);
  background: var(--bg-deep);
  border-top: 2px solid var(--border-steel);
  color: var(--text-dim);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 0;
  width: 180px;
  height: 2px;
  background: var(--accent-violet);
}

.footer-top {
  display: grid;
  grid-template-columns: 2.2fr 1fr 1fr 1.7fr;
  gap: 40px;
  max-width: 1280px;
  margin: 0 auto;
  padding: 56px 40px 32px;
}

.footer-brandcol .brand-lockup { margin-bottom: 10px; }

.footer-mission {
  margin-top: 18px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-dim);
}

.footer-trust {
  margin: 20px 0 0;
  padding: 13px 16px;
  background: rgba(255, 203, 71, 0.06);
  border-left: 3px solid var(--accent-amber);
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-dim);
}

.trust-pin {
  color: var(--accent-amber);
  margin-right: 2px;
}

.footer-heading {
  margin: 0 0 14px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border-steel);
  font-family: var(--font-title);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-violet);
}

.footer-nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-nav-list li { margin: 0; }

.footer-nav-list a {
  display: inline-block;
  padding: 6px 0;
  color: var(--text-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.15s, border-color 0.15s, padding-left 0.15s;
}

.footer-nav-list a:hover {
  color: var(--accent-mint);
  border-bottom-color: var(--accent-mint);
  padding-left: 4px;
}

.footer-contact { margin: 0; }

.contact-line {
  display: flex;
  gap: 14px;
  padding: 8px 0;
  border-bottom: 1px dashed var(--border-steel);
}

.contact-line dt {
  flex: 0 0 44px;
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--accent-amber);
}

.contact-line dd {
  font-size: 14px;
  color: var(--text-bright);
  overflow-wrap: anywhere;
}

.footer-reply {
  margin: 14px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--text-dim);
}

.footer-bottom {
  border-top: 2px solid var(--border-steel);
  background: #090C14;
}

.footer-bottom-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  align-items: center;
  justify-content: space-between;
  max-width: 1280px;
  margin: 0 auto;
  padding: 16px 40px;
}

.footer-copyright,
.footer-icp {
  margin: 0;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.03em;
  color: var(--text-dim);
}

/* ============ 主内容与容器 ============ */
.site-main {
  margin-left: var(--rail-w);
  padding-top: var(--topbar-h);
  min-height: 70vh;
}

.site-main:focus { outline: none; }

.section-grand {
  max-width: 1320px;
  margin: 0 auto;
  padding-left: 40px;
  padding-right: 40px;
}

.section-tight {
  max-width: 960px;
  margin: 0 auto;
  padding-left: 40px;
  padding-right: 40px;
}

.page-heading {
  margin: 0 0 16px;
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1.04;
  font-weight: 900;
  letter-spacing: -0.02em;
  text-transform: uppercase;
}

.heading-accent { color: var(--accent-mint); }

.page-lead {
  max-width: 760px;
  margin: 0 0 24px;
  font-size: 18px;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ============ 面包屑 ============ */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  margin: 0;
  padding: 14px 0;
  list-style: none;
  font-family: var(--font-data);
  font-size: 12px;
}

.breadcrumb li { display: flex; align-items: center; }

.breadcrumb li + li::before {
  content: "/";
  display: inline-block;
  width: 20px;
  text-align: center;
  color: var(--border-steel);
}

.breadcrumb a {
  color: var(--accent-mint);
  text-decoration: none;
}

.breadcrumb a:hover { text-decoration: underline; }

.breadcrumb .crumb-current { color: var(--text-dim); }

/* ============ 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border: 2px solid var(--accent-mint);
  background: transparent;
  color: var(--accent-mint);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.15s, color 0.15s, box-shadow 0.15s;
}

.btn:hover {
  background: var(--accent-mint);
  color: var(--bg-deep);
  box-shadow: 0 0 0 4px rgba(0, 229, 160, 0.2);
}

.btn--violet {
  border-color: var(--accent-violet);
  color: var(--accent-violet);
}

.btn--violet:hover {
  background: var(--accent-violet);
  color: #fff;
  box-shadow: 0 0 0 4px rgba(140, 124, 255, 0.2);
}

.btn--amber {
  border-color: var(--accent-amber);
  color: var(--accent-amber);
}

.btn--amber:hover {
  background: var(--accent-amber);
  color: #2a1c00;
  box-shadow: 0 0 0 4px rgba(255, 203, 71, 0.2);
}

.btn--solid {
  background: var(--accent-mint);
  color: var(--bg-deep);
}

.btn--solid:hover {
  background: #b7ffea;
  box-shadow: 0 0 0 4px rgba(0, 229, 160, 0.2);
}

/* ============ 档案面板与标签 ============ */
.panel {
  background: var(--panel-light);
  border: 2px solid var(--border-steel);
  box-shadow: var(--shadow-panel);
  padding: 24px;
  color: #1d2432;
}

.panel h1,
.panel h2,
.panel h3,
.panel h4 { color: var(--bg-deep); }

.panel a { color: #0a8a66; }
.panel a:hover { color: #065f47; }

.panel--dark {
  background: var(--bg-deep);
  border-color: var(--border-steel);
  color: var(--text-dim);
}

.panel--dark h1,
.panel--dark h2,
.panel--dark h3,
.panel--dark h4 { color: var(--text-bright); }

.panel--lift {
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.panel--lift:hover {
  transform: translate(-2px, -2px);
  box-shadow: 12px 12px 0 rgba(0, 229, 160, 0.15);
}

.panel-tag {
  display: inline-block;
  padding: 3px 10px;
  background: var(--accent-violet);
  color: var(--bg-deep);
  font-family: var(--font-data);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.panel-tag--amber { background: var(--accent-amber); }
.panel-tag--mint { background: var(--accent-mint); }

/* ============ 网格 ============ */
.grid-panels {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}

.grid-panels > .span-4 { grid-column: span 4; }
.grid-panels > .span-5 { grid-column: span 5; }
.grid-panels > .span-6 { grid-column: span 6; }
.grid-panels > .span-7 { grid-column: span 7; }
.grid-panels > .span-8 { grid-column: span 8; }
.grid-panels > .span-12 { grid-column: span 12; }

/* ============ 数据数字 ============ */
.data-figure {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  color: var(--accent-mint);
}

/* ============ 图片容器 ============ */
.img-frame {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  min-height: 140px;
  background:
    linear-gradient(135deg, rgba(0, 229, 160, 0.09), transparent 46%),
    var(--pitch-green);
  border: 2px solid var(--border-steel);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.3);
}

.img-frame::before {
  content: "IMAGE / 图片位";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: rgba(230, 234, 242, 0.55);
}

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

.img-frame--wide { aspect-ratio: 16 / 9; }
.img-frame--square { aspect-ratio: 1 / 1; }
.img-frame--portrait { aspect-ratio: 4 / 5; }

/* ============ 响应式 ============ */
@media (min-width: 1024px) {
  .site-nav { transform: none !important; }
}

@media (max-width: 1023px) {
  .site-main { margin-left: 0; }
  .site-footer { margin-left: 0; }

  .header-topbar {
    left: 0;
    padding-left: 20px;
    padding-right: 96px;
  }

  .site-nav {
    width: min(320px, 86vw);
    transform: translateX(-100%);
    transition: transform 0.28s ease;
    border-right: 2px solid var(--accent-mint);
    box-shadow: 16px 0 40px rgba(0, 0, 0, 0.5);
  }

  .site-nav[data-open] { transform: translateX(0); }

  .nav-toggle { display: flex; }

  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    padding: 40px 24px 24px;
  }

  .footer-bottom-inner {
    padding-left: 24px;
    padding-right: 24px;
  }

  .section-grand,
  .section-tight {
    padding-left: 24px;
    padding-right: 24px;
  }

  .grid-panels > .span-4,
  .grid-panels > .span-5,
  .grid-panels > .span-6,
  .grid-panels > .span-7 { grid-column: span 6; }

  .grid-panels > .span-8 { grid-column: span 12; }
}

@media (max-width: 640px) {
  .header-topbar {
    padding-left: 16px;
    padding-right: 80px;
  }

  .signal-divider,
  .signal-contact { display: none; }

  .live-signal { padding: 4px 8px; }
  .signal-text { font-size: 11px; }

  .brand-mark {
    width: 36px;
    height: 36px;
    flex-basis: 36px;
    font-size: 13px;
  }

  .brand-name { font-size: 18px; }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 32px 16px 20px;
  }

  .footer-bottom-inner {
    padding-left: 16px;
    padding-right: 16px;
  }

  .section-grand,
  .section-tight {
    padding-left: 16px;
    padding-right: 16px;
  }

  .grid-panels { gap: 16px; }

  .grid-panels > .span-4,
  .grid-panels > .span-5,
  .grid-panels > .span-6,
  .grid-panels > .span-7,
  .grid-panels > .span-8 { grid-column: span 12; }

  .page-lead { font-size: 16px; }
  .breadcrumb { font-size: 11px; }
}

/* ============ 减少动效 ============ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.001s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001s !important;
  }

  .signal-dot { animation: none; }
}