/* ===== 基础重置 ===== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  background-color: #0A1A2B;
  color: #F5F7FA;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  word-break: break-word;
}

#main-content {
  flex: 1 0 auto;
  width: 100%;
  position: relative;
  z-index: 1;
}

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

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

ul,
ol {
  list-style: none;
}

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

input,
textarea {
  font-family: inherit;
}

:focus-visible {
  outline: 2px solid #00FF88;
  outline-offset: 3px;
}

::selection {
  background: #FF6B00;
  color: #0A1A2B;
}

/* ===== CSS 变量 ===== */
:root {
  --color-primary: #0A1A2B;
  --color-secondary: #122A3E;
  --color-accent1: #FF6B00;
  --color-accent2: #00FF88;
  --color-accent-hover: #E55D00;
  --color-text-main: #F5F7FA;
  --color-text-mute: #B0B8C4;
  --color-data-line: #00CC66;
  --color-panel-extra: #1B4B6E;
  --color-error: #FF3B30;
  --color-dark-green: #00CC66;
  --font-main: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "Roboto Mono", "SFMono-Regular", Consolas, "Liberation Mono", "Courier New", monospace;
  --font-note: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --space-page-x: clamp(20px, 5vw, 80px);
  --space-page-y: clamp(40px, 8vw, 100px);
  --header-height-desktop: auto;
  --nav-toggle-size: 44px;
  --transition-speed: 0.2s;
  --container-max: 1440px;
  --container-width: min(100% - clamp(20px, 5vw, 80px) * 2, 1440px);
}

/* ===== 头部 ===== */
.site-header {
  position: relative;
  z-index: 100;
  background-color: var(--color-primary);
  color: var(--color-text-main);
  width: 100%;
}

.header-marquee {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 8px clamp(20px, 5vw, 80px);
  background-color: var(--color-primary);
  border-bottom: 1px solid rgba(0, 255, 136, 0.15);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--color-text-mute);
  white-space: nowrap;
  overflow: hidden;
}

.marquee-mark {
  color: var(--color-accent2);
  text-transform: uppercase;
  flex: 0 0 auto;
}

.marquee-mark::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--color-accent2);
  margin-right: 6px;
  animation: pulse-dot 1.6s ease-in-out infinite;
}

.marquee-text {
  overflow: hidden;
  text-overflow: ellipsis;
  opacity: 0.75;
}

.marquee-coord {
  color: var(--color-accent1);
  letter-spacing: 0.12em;
  flex: 0 0 auto;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.nav-shell {
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  width: 100%;
  min-height: 72px;
  padding: 0 clamp(20px, 5vw, 80px);
  gap: 24px;
  border-bottom: 1px solid rgba(176, 184, 196, 0.1);
  position: relative;
}

.brand-block {
  display: flex;
  align-items: center;
  flex: 0 0 auto;
  position: relative;
}

.brand-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  position: relative;
  padding: 8px 0;
}

.brand-en {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-accent2);
  line-height: 1;
}

.brand-cn {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 0.12em;
  line-height: 1;
  color: var(--color-text-main);
}

.brand-sub {
  display: block;
  position: absolute;
  left: 0;
  bottom: -16px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--color-text-mute);
  font-family: var(--font-mono);
  width: max-content;
  opacity: 0.8;
}

.brand-link::after {
  content: "";
  position: absolute;
  right: -12px;
  top: 4px;
  width: 4px;
  height: 4px;
  background: var(--color-accent1);
  transform: rotate(45deg);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1 1 auto;
  justify-content: flex-end;
  position: relative;
}

.nav-coordinate {
  display: none;
}

.nav-link {
  position: relative;
  display: inline-block;
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--color-text-main);
  transition: color 0.2s ease;
  white-space: nowrap;
}

.nav-link::before {
  content: "·";
  font-family: var(--font-mono);
  color: var(--color-accent1);
  margin-right: 6px;
  opacity: 0;
  transition: opacity 0.2s ease, transform 0.2s ease;
  transform: translateX(-4px);
  display: inline-block;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--color-accent2);
}

.nav-link:hover::before,
.nav-link:focus-visible::before {
  opacity: 1;
  transform: translateX(0);
}

.nav-link[aria-current="page"] {
  color: var(--color-accent1);
  font-weight: 700;
}

.nav-link[aria-current="page"]::before {
  content: "";
  opacity: 1;
  transform: translateX(0);
  width: 8px;
  height: 8px;
  background: var(--color-accent1);
  box-shadow: 0 0 0 2px rgba(255, 107, 0, 0.2);
  transform: rotate(45deg);
  margin-right: 8px;
}

/* 当前导航页的荧光绿下划线 */
.nav-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 28px;
  right: 8px;
  bottom: 0;
  height: 2px;
  background: var(--color-accent2);
  transform: skewX(-20deg);
}

.nav-cta {
  margin-left: 12px;
}

.btn-cta {
  position: relative;
}

.nav-toggle {
  display: none;
  width: var(--nav-toggle-size);
  height: var(--nav-toggle-size);
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: 1px solid rgba(0, 255, 136, 0.3);
  position: relative;
  align-self: center;
  transition: border-color 0.2s ease;
}

.nav-toggle-line {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-text-main);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) {
  transform: translateY(8px) 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(-8px) rotate(-45deg);
}

.nav-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  justify-content: center;
  gap: 2px;
  flex: 0 0 auto;
  padding-left: 16px;
  border-left: 1px solid rgba(176, 184, 196, 0.2);
  font-family: var(--font-mono);
  letter-spacing: 0.1em;
}

.meta-text {
  font-size: 11px;
  color: var(--color-text-mute);
  text-transform: uppercase;
}

.meta-code {
  font-size: 13px;
  color: var(--color-accent2);
}

/* ===== 跳过链接 ===== */
.skip-link {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 1000;
  background: var(--color-accent2);
  color: var(--color-primary);
  font-weight: 700;
  padding: 12px 20px;
  border-radius: 0;
  clip-path: polygon(10px 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
  transform: translateY(0);
  transition: top 0.25s ease;
}

.skip-link:focus-visible {
  top: 16px;
  outline: 2px solid var(--color-text-main);
  outline-offset: 2px;
}

/* ===== 页脚 ===== */

.site-footer {
  background-color: var(--color-secondary);
  color: var(--color-text-main);
  position: relative;
  z-index: 1;
  border-top: 1px solid rgba(0, 255, 136, 0.3);
  margin-top: 80px;
}

.footer-grid-deco {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 120px;
  background-image: linear-gradient(rgba(0, 255, 136, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 255, 136, 0.06) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(280px, 1.4fr) minmax(240px, 1fr) minmax(180px, 0.8fr) minmax(180px, 0.9fr);
  gap: clamp(16px, 3vw, 48px);
  padding: clamp(32px, 5vw, 64px) clamp(20px, 5vw, 80px) 32px;
  position: relative;
}

.footer-brand-block {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: flex-start;
}

.footer-brand-line {
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-brand-en {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  color: var(--color-accent2);
  letter-spacing: 0.1em;
}

.footer-brand-cn {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.footer-slogan {
  font-size: 18px;
  font-weight: 500;
  color: var(--color-text-main);
  margin-top: 4px;
  border-left: 3px solid var(--color-accent1);
  padding-left: 14px;
}

.footer-trust {
  font-size: 14px;
  font-family: var(--font-mono);
  color: var(--color-text-mute);
  letter-spacing: 0.04em;
  margin-top: 4px;
}

.footer-panel {
  position: relative;
  padding: 20px 16px;
  background-color: var(--color-primary);
  clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
}

.footer-panel-title {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--color-accent1);
  text-transform: uppercase;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
}

.footer-panel-title::after {
  content: "";
  flex: 0 0 22px;
  height: 2px;
  background: var(--color-accent2);
}

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

.footer-contact-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  line-height: 1.5;
}

.contact-icon {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--color-accent2);
  background: var(--color-secondary);
  padding: 2px 6px;
  letter-spacing: 0.08em;
  margin-top: 4px;
}

.contact-address {
  color: var(--color-text-mute);
  font-size: 13px;
}

.footer-links-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.footer-link {
  display: block;
  font-size: 14px;
  padding: 4px 0 4px 12px;
  border-left: 2px solid transparent;
  color: var(--color-text-main);
  transition: border-color 0.2s ease, color 0.2s ease;
  position: relative;
}

.footer-link:hover,
.footer-link:focus-visible {
  border-left-color: var(--color-accent2);
  color: var(--color-accent2);
}

.legal-links-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-legal-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border: 1px solid rgba(176, 184, 196, 0.15);
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.footer-legal-link:hover,
.footer-legal-link:focus-visible {
  border-color: var(--color-accent1);
  background-color: rgba(255, 107, 0, 0.1);
}

.legal-code {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--color-accent2);
  background: rgba(0, 255, 136, 0.1);
  padding: 4px 6px;
  letter-spacing: 0.06em;
}

.legal-label {
  font-size: 14px;
}

/* 页脚底栏 */
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding: 18px clamp(20px, 5vw, 80px);
  border-top: 1px solid rgba(176, 184, 196, 0.1);
  background-color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text-mute);
  width: 100%;
  position: relative;
}

.footer-bottom-left,
.footer-bottom-right {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.copy-sign {
  font-size: 16px;
  color: var(--color-accent1);
}

.copy-divider {
  opacity: 0.4;
}

.copy-brand {
  color: var(--color-text-main);
  font-weight: 500;
}

.copy-desc {
  color: var(--color-text-mute);
}

.icp-text {
  letter-spacing: 0.04em;
}

.footer-btn-go {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: var(--color-secondary);
  border: 1px solid rgba(0, 255, 136, 0.3);
  font-size: 14px;
  color: var(--color-accent2);
  transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.footer-btn-go:hover,
.footer-btn-go:focus-visible {
  background-color: var(--color-accent1);
  border-color: var(--color-accent1);
  color: var(--color-primary);
  transform: translateY(-2px);
}

.go-arrow {
  display: block;
  line-height: 1;
}

/* ===== 通用组件 ===== */

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  background-color: var(--color-accent1);
  color: var(--color-primary);
  border: none;
  clip-path: polygon(14px 0, 100% 0, calc(100% - 14px) 100%, 0 100%);
  transition: background-color 0.2s ease, transform 0.15s ease, box-shadow 0.2s ease;
  cursor: pointer;
  user-select: none;
  text-transform: uppercase;
  line-height: 1.4;
}

.btn:hover,
.btn:focus-visible {
  background-color: var(--color-accent-hover);
  color: var(--color-primary);
  box-shadow: 0 4px 20px rgba(255, 107, 0, 0.25);
}

.btn:active {
  transform: scale(0.97);
}

.btn-secondary {
  background: transparent;
  color: var(--color-accent2);
  border: 2px solid var(--color-accent2);
  clip-path: polygon(14px 0, 100% 0, calc(100% - 14px) 100%, 0 100%);
  box-shadow: none;
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  background-color: var(--color-accent2);
  color: var(--color-primary);
  box-shadow: 0 4px 20px rgba(0, 255, 136, 0.2);
}

/* 章节标签 */
.section-label {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--color-accent1);
  text-transform: uppercase;
  margin-bottom: 14px;
}

.section-label::before {
  content: "//";
  margin-right: 8px;
  color: var(--color-accent2);
}

.section-label::after {
  content: "";
  display: inline-block;
  width: 32px;
  height: 2px;
  background: var(--color-accent1);
  margin-left: 8px;
  transform: skewX(-20deg);
}

/* 标题结构 */
.section-header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 32px;
}

.page-title-lg {
  font-size: clamp(36px, 7vw, 72px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-top: 8px;
  max-width: 8em;
}

.page-title-lg .outline {
  color: transparent;
  -webkit-text-stroke: 1px rgba(0, 255, 136, 0.5);
}

.page-sub-note {
  display: block;
  writing-mode: vertical-rl;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--color-text-mute);
  font-family: var(--font-mono);
  text-transform: uppercase;
  margin-left: auto;
  padding-top: 8px;
  position: relative;
}

.page-sub-note::before {
  content: "";
  width: 1px;
  height: 38px;
  background: var(--color-accent2);
  display: inline-block;
  margin-right: 8px;
  vertical-align: top;
  opacity: 0.6;
}

/* 堆叠面板 */
.stack-panel {
  position: relative;
  background-color: var(--color-secondary);
  border: 1px solid rgba(176, 184, 196, 0.08);
  padding: clamp(20px, 4vw, 48px);
  margin: 32px 0;
  clip-path: polygon(24px 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%, 0 24px);
  position: relative;
}

.stack-panel::after {
  content: "";
  position: absolute;
  top: 12px;
  right: 12px;
  width: 10px;
  height: 10px;
  background: var(--color-accent2);
  opacity: 0.6;
  clip-path: polygon(0 0, 100% 100%, 0 100%);
}

.cut-corner {
  clip-path: polygon(14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%, 0 14px);
}

/* 标签组件 */
.chips-tag {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.data-chip {
  display: inline-flex;
  align-items: center;
  font-size: 13px;
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  padding: 8px 18px;
  background: var(--color-secondary);
  border: 1px solid rgba(176, 184, 196, 0.15);
  color: var(--color-text-mute);
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
  clip-path: polygon(10px 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
}

.data-chip:hover,
.data-chip:focus-visible {
  color: var(--color-accent2);
  border-color: var(--color-accent2);
}

.data-chip[data-active="true"],
.data-chip.active {
  background-color: var(--color-accent1);
  color: var(--color-primary);
  border-color: var(--color-accent1);
  font-weight: 700;
}

/* 统计卡片 */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: clamp(14px, 3vw, 32px);
  margin: 28px 0;
}

.stat-card {
  background-color: var(--color-primary);
  padding: 24px 20px;
  border-left: 4px solid var(--color-accent1);
  position: relative;
  min-height: 140px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  clip-path: polygon(18px 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%, 0 18px);
}

.stat-card:nth-child(even) {
  border-left-color: var(--color-accent2);
}

.stat-number {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(32px, 5vw, 52px);
  line-height: 1.1;
  font-weight: 700;
  color: var(--color-accent2);
}

.stat-card:nth-child(even) .stat-number {
  color: var(--color-accent1);
}

.stat-label {
  display: block;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--color-text-mute);
  margin-top: 12px;
  text-transform: uppercase;
  font-family: var(--font-mono);
}

/* 数据表格容器 */
.data-table-wrap {
  overflow-x: auto;
  border: 1px solid rgba(176, 184, 196, 0.12);
  background: var(--color-primary);
  padding: 8px;
  -webkit-overflow-scrolling: touch;
  scrollbar-color: var(--color-accent2) var(--color-secondary);
}

.table-record {
  display: grid;
  grid-template-columns: 2fr 1.2fr 0.8fr;
  gap: 8px;
  padding: 10px;
  border-bottom: 1px solid rgba(176, 184, 196, 0.08);
  align-items: center;
  font-size: 14px;
  color: var(--color-text-main);
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.table-record:last-child {
  border-bottom: none;
}

.table-record:hover,
.table-record:focus-within {
  background: var(--color-secondary);
  transform: translateX(4px);
}

.table-record span:first-child {
  font-weight: 500;
}

.table-record span:nth-child(2) {
  font-family: var(--font-mono);
  color: var(--color-accent2);
}

.table-record span:last-child {
  font-family: var(--font-mono);
  color: var(--color-accent1);
  text-align: right;
}

/* 时间线 */
.timeline-list {
  position: relative;
  padding-left: 28px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.timeline-list::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 6px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-accent2) 0%, var(--color-accent1) 100%);
  transform: skewX(-14deg);
}

.timeline-list li {
  position: relative;
  padding: 14px 18px;
  background: var(--color-secondary);
  border-left: 3px solid var(--color-accent2);
  clip-path: polygon(10px 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
}

.timeline-list li::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 18px;
  width: 10px;
  height: 10px;
  background: var(--color-accent1);
  transform: rotate(45deg);
}

.timeline-time {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-accent2);
  display: block;
}

.timeline-text {
  font-size: 15px;
  color: var(--color-text-main);
  margin-top: 4px;
}

/* 功能卡片网格 */
.feature-grid-3col {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: clamp(16px, 3vw, 32px);
}

.feature-card {
  background: var(--color-secondary);
  border: 1px solid rgba(0, 255, 136, 0.14);
  padding: 28px 24px;
  transition: transform 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
  clip-path: polygon(18px 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%, 0 18px);
  position: relative;
}

.feature-card::after {
  content: "";
  position: absolute;
  bottom: 0;
  right: 0;
  width: 28px;
  height: 28px;
  background: rgba(0, 255, 136, 0.15);
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
}

.feature-card:hover,
.feature-card:focus-within {
  transform: translateY(-6px);
  background: var(--color-primary);
  border-color: var(--color-accent2);
}

.feature-card-icon {
  display: block;
  font-family: var(--font-mono);
  font-size: 24px;
  color: var(--color-accent1);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.feature-card-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--color-text-main);
}

.feature-card p {
  font-size: 14px;
  color: var(--color-text-mute);
  line-height: 1.6;
}

/* 文章卡片 */
.article-card {
  background: var(--color-primary);
  border: 1px solid rgba(176, 184, 196, 0.1);
  padding: 24px 20px;
  transition: border-color 0.2s ease, transform 0.2s ease;
  position: relative;
}

.article-card:hover,
.article-card:focus-visible {
  border-color: var(--color-accent1);
  transform: translateX(6px);
}

.article-card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 24px;
  height: 24px;
  border-right: 2px solid var(--color-accent2);
  border-top: 2px solid var(--color-accent2);
  clip-path: polygon(0 0, 100% 0, 100% 100%);
}

.article-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.3;
  color: var(--color-text-main);
}

.article-title a {
  color: inherit;
}

.article-title a:hover {
  color: var(--color-accent2);
}

.article-meta {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-text-mute);
  letter-spacing: 0.06em;
  margin-bottom: 10px;
}

.article-excerpt {
  font-size: 14px;
  color: var(--color-text-mute);
  line-height: 1.5;
}

/* FAQ */
.faq-item {
  border: 1px solid rgba(176, 184, 196, 0.14);
  margin-bottom: 0;
  clip-path: polygon(14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%, 0 14px);
  background: var(--color-secondary);
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.faq-item[data-open="true"] {
  border-color: rgba(0, 255, 136, 0.4);
  background: var(--color-primary);
}

.faq-q {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  width: 100%;
  text-align: left;
  padding: 20px 24px;
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text-main);
  background: transparent;
  border: none;
}

.faq-q::before {
  content: "Q";
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--color-accent1);
  margin-right: 8px;
}

.faq-q::after {
  content: "+";
  margin-left: auto;
  color: var(--color-accent2);
  font-family: var(--font-mono);
  font-size: 20px;
  transition: transform 0.2s ease;
  flex: 0 0 auto;
}

.faq-item[data-open="true"] .faq-q::after {
  transform: rotate(45deg);
}

.faq-a {
  display: none;
  padding: 0 24px 20px 56px;
  font-size: 15px;
  color: var(--color-text-mute);
  line-height: 1.7;
}

.faq-item[data-open="true"] .faq-a {
  display: block;
}

.faq-a::before {
  content: "A";
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--color-accent2);
  margin-right: 8px;
}

/* ===== 联系矩阵 ===== */
.contact-matrix {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}

.contact-cell {
  background: var(--color-secondary);
  padding: 28px 20px;
  border-top: 3px solid var(--color-accent1);
  position: relative;
}

.contact-cell:nth-child(even) {
  border-top-color: var(--color-accent2);
}

.contact-cell-label {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-accent2);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  display: block;
  margin-bottom: 10px;
}

.contact-cell a,
.contact-cell p {
  font-size: 14px;
  color: var(--color-text-main);
  display: block;
  word-break: break-all;
}

.contact-cell a:hover {
  color: var(--color-accent1);
}

/* ===== 首屏与排版辅助 ===== */
.page-hero {
  position: relative;
  padding-top: var(--space-page-y);
  padding-bottom: 40px;
  margin-bottom: 48px;
  min-height: 360px;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 107, 0, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 107, 0, 0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  pointer-events: none;
}

.page-hero::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 200px;
  height: 100%;
  background: var(--color-secondary);
  clip-path: polygon(40% 0, 100% 0, 100% 100%, 0 100%);
  opacity: 0.5;
  pointer-events: none;
}

.hero-title-block {
  max-width: 720px;
  position: relative;
  z-index: 2;
  padding-bottom: 24px;
}

.hero-meta-data {
  display: flex;
  gap: 16px;
  margin-top: 20px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text-mute);
  flex-wrap: wrap;
  letter-spacing: 0.08em;
}

.hero-meta-data span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.hero-meta-data span::before {
  content: "●";
  color: var(--color-accent2);
  font-size: 10px;
}

.hero-meta-data span:nth-child(2)::before {
  color: var(--color-accent1);
}

/* 网格装饰 */
.grid-deco {
  background-image: linear-gradient(rgba(0, 255, 136, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 255, 136, 0.05) 1px, transparent 1px);
  background-size: 36px 36px;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.coordinate-deco {
  position: absolute;
  right: 40px;
  bottom: 30px;
  width: 180px;
  height: 90px;
  border-left: 1px solid rgba(0, 255, 136, 0.3);
  border-bottom: 1px solid rgba(0, 255, 136, 0.3);
  pointer-events: none;
  opacity: 0.7;
}

.coordinate-deco::before {
  content: "0,0";
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-accent2);
  position: absolute;
  bottom: 6px;
  left: 8px;
}

.coordinate-deco::after {
  content: "▲";
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-accent1);
  position: absolute;
  top: 4px;
  right: 8px;
}

/* ===== 图片容器基础规则 ===== */
.image-container {
  position: relative;
  background: var(--color-secondary);
  overflow: hidden;
}

.image-container::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(0, 255, 136, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 255, 136, 0.04) 1px, transparent 1px);
  background-size: 28px 28px;
  z-index: 2;
  pointer-events: none;
}

.image-container::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 16px;
  height: 16px;
  background: var(--color-accent1);
  z-index: 3;
  clip-path: polygon(0 0, 100% 0, 0 100%);
  opacity: 0.8;
}

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

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

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

.image-placeholder {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-panel-extra) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-mute);
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.image-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 3;
  background: rgba(10, 26, 43, 0.9);
  color: var(--color-accent2);
  font-size: 12px;
  font-family: var(--font-mono);
  padding: 10px 16px;
  border-left: 3px solid var(--color-accent1);
  letter-spacing: 0.04em;
}

.image-caption-editorial {
  position: absolute;
  right: 8px;
  top: 8px;
  background: var(--color-primary);
  color: var(--color-accent2);
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 6px 10px;
  z-index: 3;
  transform: none;
  transition: transform 0.2s ease;
}

.image-container:hover .image-caption-editorial {
  transform: translateY(-4px);
}

/* ===== 面包屑 ===== */
.breadcrumb-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  font-family: var(--font-mono);
  color: var(--color-text-mute);
  margin-bottom: 32px;
  position: relative;
  z-index: 2;
}

.breadcrumb-nav a {
  color: var(--color-accent2);
}

.breadcrumb-nav a:hover,
.breadcrumb-nav a:focus-visible {
  color: var(--color-accent1);
}

.breadcrumb-nav .current {
  color: var(--color-text-mute);
}

/* ===== 滚动进度 ===== */
.progress-tracker {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--color-accent1) 0%, var(--color-accent2) 100%);
  z-index: 9999;
  transition: width 60ms linear;
  box-shadow: 0 0 12px rgba(255, 107, 0, 0.5);
}

/* ===== 辅助/工具 ===== */
.sr-only {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ===== 内容通用容器 (供具体页面复用) ===== */
.container {
  width: var(--container-width);
  margin-inline: auto;
}

/* 宽大页面容器 */
.container-wide {
  max-width: 100%;
  padding-left: clamp(20px, 5vw, 80px);
  padding-right: clamp(20px, 5vw, 80px);
}

/* ===== 响应式：平板 <= 1200px ===== */
@media (max-width: 1200px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .nav-meta {
    display: none;
  }

  .site-nav {
    justify-content: center;
  }

  .nav-cta {
    margin-left: 8px;
  }
}

/* ===== 响应式：手机/移动端 <= 900px ===== */
@media (max-width: 900px) {
  .header-marquee {
    padding: 6px 16px;
    font-size: 10px;
  }

  .marquee-coord {
    display: none;
  }

  .nav-shell {
    align-items: center;
    min-height: 64px;
    padding: 0 16px;
    gap: 12px;
  }

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

  .brand-en {
    font-size: 16px;
  }

  .brand-sub {
    display: none;
  }

  .brand-link::after {
    right: -8px;
    top: 2px;
    width: 3px;
    height: 3px;
  }

  /* 移动导航 */
  .nav-toggle {
    display: flex;
    flex: 0 0 auto;
    z-index: 1001;
  }

  .nav-cta {
    display: none;
  }

  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    width: min(80%, 320px);
    height: 100vh;
    height: 100dvh;
    background: var(--color-primary);
    border-left: 1px solid rgba(0, 255, 136, 0.3);
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    padding: 100px 32px 32px;
    gap: 8px;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    z-index: 1000;
    overflow-y: auto;
  }

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

  .site-nav::before {
    content: "YIBO / 导航";
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.2em;
    color: var(--color-accent1);
    margin-bottom: 16px;
    display: block;
  }

  .nav-coordinate {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 20px;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--color-accent2);
    letter-spacing: 0.1em;
  }

  .coord-dot {
    width: 8px;
    height: 8px;
    background: var(--color-accent2);
    clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
    display: inline-block;
  }

  .nav-link {
    font-size: 18px;
    padding: 14px 16px;
    width: 100%;
    border-bottom: 1px solid rgba(176, 184, 196, 0.08);
    text-align: left;
  }

  .nav-link::before {
    margin-right: 10px;
  }

  .nav-link[aria-current="page"]::after {
    left: 16px;
    right: auto;
    width: 40px;
  }

  .nav-cta {
    width: 100%;
    margin-top: 24px;
  }

  .nav-cta .btn {
    width: 100%;
  }

  /* 页脚 */
  .footer-top {
    grid-template-columns: 1fr;
    padding: 32px 16px 24px;
    gap: 20px;
  }

  .footer-bottom {
    padding: 14px 16px;
    justify-content: center;
    text-align: center;
  }

  .footer-bottom-left,
  .footer-bottom-right {
    justify-content: center;
  }

  .footer-panel {
    padding: 18px 14px;
  }

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

  .page-title-lg {
    font-size: clamp(28px, 8vw, 48px);
  }

  .stack-panel {
    padding: 18px 14px;
    margin: 20px 0;
  }

  .page-hero {
    min-height: 260px;
  }

  .page-hero::after {
    width: 120px;
  }

  .page-sub-note {
    writing-mode: horizontal-tb;
    font-size: 11px;
    padding-top: 0;
    margin-left: 0;
    margin-top: 8px;
  }

  .page-sub-note::before {
    width: 28px;
    height: 2px;
    margin-right: 4px;
    margin-bottom: 4px;
  }
}

/* 小屏特定调整 */
@media (max-width: 480px) {
  .header-marquee {
    gap: 8px;
  }

  .marquee-text {
    max-width: 60vw;
    font-size: 10px;
  }

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

  .stat-card {
    padding: 18px 14px;
    min-height: 120px;
  }

  .stat-number {
    font-size: 28px;
  }

  .table-record {
    grid-template-columns: 1fr 0.9fr 0.6fr;
    font-size: 13px;
    min-width: 360px;
  }
}

/* ===== 滚动条等自定义 ===== */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--color-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--color-secondary);
  border: 1px solid rgba(0, 255, 136, 0.3);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-accent1);
}

/* ===== 无障碍 ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .marquee-mark::before {
    animation: none;
  }

  .site-nav {
    transition: none;
  }

  .progress-tracker {
    transition: none;
  }
}

@media print {
  .site-header,
  .site-footer {
    display: none;
  }

  body {
    background: #fff;
    color: #000;
  }
}