/* ============================================================
   AI2050 官网 —— 融合工作台（/rdc-fusion）风格主题层
   设计语言取自 rdc_fusion.css 实测 token：
   slate 文字体系 / #e2e8f0 边框 / sky#0284c7 主强调 / emerald#34d399 状态
   mono 数字与标签 / 白面板+轻阴影 / 渐变 logo 标 / 紧凑控制台质感
   本文件在 styles.css 之后加载，仅覆写视觉皮肤，不改布局结构
   ============================================================ */

:root {
  --ink: #1e293b;
  --muted: #475569;
  --line: #e2e8f0;
  --blue: #0284c7;
  --blue-deep: #0369a1;
  --sky: #e0f2fe;
  --silver: #f8fafc;
  --white: #ffffff;
  --shadow: 0 2px 10px rgba(15, 23, 42, 0.06);
  --em: #34d399;
  --em-deep: #059669;
  --indigo: #6366f1;
  --amber: #f59e0b;
  --rose: #f43f5e;
  --mono: ui-monospace, "Cascadia Code", Consolas, monospace;
}

/* ---------- 基底 ---------- */
body {
  font-family: "Segoe UI", system-ui, "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 88% 4%, rgba(14, 165, 233, 0.05), transparent 30rem),
    radial-gradient(circle at 6% 42%, rgba(52, 211, 153, 0.04), transparent 26rem),
    var(--silver);
}

h1 {
  color: #0f172a;
  background: none;
  -webkit-background-clip: initial;
  background-clip: initial;
}

::selection {
  background: rgba(14, 165, 233, 0.22);
}

/* ---------- 顶栏（融合 topbar：紧凑 56px） ---------- */
.site-header {
  min-height: 56px;
  gap: 1.5rem;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(14px);
}

.brand {
  gap: 0.6rem;
}

/* 顶栏品牌：按需求去掉左侧图标，只留 AI2050 文字（页脚仍保留色块标识） */
.site-footer .brand::before {
  content: "";
  width: 22px;
  height: 22px;
  border-radius: 6px;
  background: linear-gradient(135deg, #0ea5e9, #6366f1);
  box-shadow: 0 4px 10px rgba(14, 165, 233, 0.35);
}

.brand-word {
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.nav-links {
  gap: 1.7rem;
  font-size: 0.86rem;
  font-weight: 600;
}

.nav-links a {
  padding: 1.2rem 0;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--blue);
}

/* ---------- 按钮（融合 fw-tbtn / fw-tbtn.primary） ---------- */
.header-action,
.primary-button,
.ghost-button {
  min-height: 32px;
  padding: 0 0.95rem;
  border-radius: 6px;
  font-size: 0.82rem;
  font-weight: 600;
}

.header-action,
.primary-button {
  color: #fff;
  background: var(--blue);
  box-shadow: none;
}

.header-action:hover,
.primary-button:hover {
  background: #0ea5e9;
}

.header-action::after,
.primary-button::after {
  margin-left: 0.45rem;
  opacity: 0.72;
}

.ghost-button {
  border: 1px solid #cbd5e1;
  color: #334155;
  background: #fff;
}

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

.home-shell .hero .primary-button {
  border: 1px solid var(--blue);
  color: #fff;
  background: var(--blue);
  box-shadow: none;
}

.header-action.dark,
.dark {
  border: 1px solid #cbd5e1;
  color: #334155;
  background: #fff;
  box-shadow: none;
}

.header-action.dark:hover {
  border-color: var(--blue);
  color: var(--blue);
}

/* ---------- 首页 Hero（融合 fw-hero 渐变） ---------- */
.hero::before {
  background: linear-gradient(90deg, transparent, #0ea5e9, transparent);
}

.visual-glow {
  border-color: rgba(14, 165, 233, 0.25);
  box-shadow:
    inset 0 0 70px rgba(14, 165, 233, 0.1),
    0 0 90px rgba(52, 211, 153, 0.12);
}

/* ---------- 栏目卡（融合 fw-entry：白面板 + 悬浮上移） ---------- */
.programs {
  gap: 14px;
}

.program-card {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  box-shadow: none;
  transition: all 0.15s;
}

.program-card:hover {
  border-color: var(--blue);
  box-shadow: 0 2px 8px rgba(2, 132, 199, 0.08);
  transform: translateY(-1px);
}

.program-index {
  font-family: var(--mono);
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.program-index::after {
  width: 34px;
  height: 1px;
  background: #0ea5e9;
}

.program-image {
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.25), rgba(255, 255, 255, 0.9)),
    linear-gradient(135deg, #f8fafc, #e0f2fe);
}

/* 变体背景必须在 base 之后重声明：否则本层 base 的 background 简写
   会覆盖 styles.css 中 .horizon/.brain/.forum 的 url() 栏目图 */
.horizon {
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.92), rgba(255, 255, 255, 0.16), rgba(255, 255, 255, 0.84)),
    url("assets/home_plan.png") center / cover no-repeat;
}

.brain {
  background:
    linear-gradient(90deg, rgba(15, 23, 42, 0.06), rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.9)),
    url("assets/home_agi.png") center / cover no-repeat;
}

.forum {
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.92), rgba(255, 255, 255, 0.14), rgba(255, 255, 255, 0.86)),
    url("assets/home_forum.png") center / cover no-repeat;
}

.lighthouse {
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.2), rgba(255, 255, 255, 0.7), rgba(255, 255, 255, 0.96)),
    url("assets/home_support.png") center / cover no-repeat;
}

/* ---------- 页脚 ---------- */
.site-footer {
  background: #fff;
  border-top: 1px solid var(--line);
}

.footer-brand p,
.footer-col a {
  color: #64748b;
}

.footer-col a:hover {
  color: var(--blue);
}

.footer-bottom {
  color: #94a3b8;
  border-top: 1px solid var(--line);
}

/* ---------- 子页 Hero 与装饰视觉 ---------- */
.sub-hero h1 {
  color: #0f172a;
}

.project-link-bar {
  border: 1px solid var(--line);
  border-radius: 10px;
  color: #334155;
  background: #fff;
  font-family: var(--mono);
  font-weight: 600;
}

.project-link-bar a {
  color: var(--blue);
}

/* ---------- AI2050 计划页（手风琴计划清单） ---------- */
.plan-section {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
}

.plan-item-detail {
  background: #f8fafc;
}

.plan-detail-visual {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #eff6ff;
}

.num {
  border: 1px solid var(--line);
  color: var(--blue);
  background: #f0f9ff;
  font-family: var(--mono);
  font-size: 1.05rem;
  font-weight: 700;
}

.row-arrow {
  border: 1px solid var(--line);
  color: #94a3b8;
}

.plan-item.is-expanded .row-arrow {
  color: var(--blue);
}

/* ---------- 图标圆片（融合调色） ---------- */
.blue { color: #0369a1; background: #e0f2fe; }
.green { color: var(--em-deep); background: #ecfdf5; }
.orange { color: #d97706; background: #fffbeb; }
.purple { color: var(--indigo); background: #eef2ff; }

/* ---------- AGI 研究页（路线 / 进展面板） ---------- */
.route-panel,
.progress-panel,
.join-band {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
}

.route-steps span {
  font-family: var(--mono);
  color: var(--blue);
}

.route-visual span {
  border: 1px solid var(--line);
  color: #475569;
  background: #fff;
  font-family: var(--mono);
  font-size: 0.85rem;
}

.route-pyramid {
  background:
    linear-gradient(rgba(2, 132, 199, 0.15) 1px, transparent 1px),
    linear-gradient(90deg, rgba(2, 132, 199, 0.15) 1px, transparent 1px),
    linear-gradient(180deg, #f8fafc, #e0f2fe);
  box-shadow: 0 16px 50px rgba(2, 132, 199, 0.1);
}

.formula-strip,
.research-callout {
  border: 1px solid var(--line);
  border-radius: 8px;
  color: #334155;
  background: #fff;
}

.route-panel .formula-strip {
  border: 0;
  background: transparent;
}

.research-callout {
  border: 0;
  background: transparent;
  color: #0f172a;
}

.research-callout::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 0.6rem;
  border-radius: 50%;
  background: var(--em);
  box-shadow: 0 0 0 3px rgba(52, 211, 153, 0.25);
}

.progress-panel .progress-list article {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
}

.progress-arrow {
  color: #0ea5e9;
}

.progress-percent {
  color: #0f172a;
  font-family: var(--mono);
}

/* ---------- About 页（使命 / 原则 / 加入） ---------- */
.join-band h2 {
  color: #0f172a;
}

.stats-grid {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
}

.stats-grid b {
  font-family: var(--mono);
  color: var(--blue);
}

/* ---------- 行业进展页 ---------- */
.industry-page {
  --industry-navy: #0f172a;
  --industry-cyan: #0ea5e9;
  --industry-violet: #6366f1;
}

.industry-page .eyebrow,
.eyebrow {
  font-family: var(--mono);
  color: var(--blue);
  letter-spacing: 0.14em;
}

.industry-hero {
  border: 1px solid var(--line);
  border-radius: 10px;
  color: #1e293b;
  background: linear-gradient(120deg, #fff 55%, #eff6ff);
  box-shadow: none;
}

.industry-hero::before {
  background-image:
    linear-gradient(rgba(2, 132, 199, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(2, 132, 199, 0.05) 1px, transparent 1px);
}

.industry-hero .eyebrow {
  color: var(--blue);
}

.industry-hero h1 {
  color: #0f172a;
}

.industry-page .industry-lead {
  border-left: 3px solid var(--em);
  color: #334155 !important;
}

.industry-page .industry-lead-label {
  color: var(--blue);
  font-family: var(--mono);
}

.evidence-date {
  color: #94a3b8 !important;
  font-family: var(--mono);
}

/* 雷达视觉 */
.radar-ring {
  border-color: rgba(14, 165, 233, 0.3);
}

.radar-ring::before,
.radar-ring::after {
  background: rgba(14, 165, 233, 0.18);
}

.radar-core {
  border: 1px solid #bae6fd;
  background: radial-gradient(circle, #ffffff, #e0f2fe);
  box-shadow: 0 10px 30px rgba(2, 132, 199, 0.15);
}

.radar-core strong {
  color: #0369a1;
  font-family: var(--mono);
}

.radar-core span {
  color: #64748b;
  font-family: var(--mono);
}

.radar-node {
  border: 1px solid var(--line);
  color: #334155;
  background: #fff;
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.06);
}

.radar-node::before {
  background: #0ea5e9;
  box-shadow: 0 0 0 5px rgba(14, 165, 233, 0.12);
}

.company-heading {
  border-bottom: 1px solid var(--line);
}

/* 实验室卡：左栏深色档位换融合三色（sky / indigo / emerald） */
.company-progress .lab-card {
  border: 1px solid var(--line);
  border-top-width: 1px;
  border-radius: 10px;
  background: #fff;
  transition: all 0.15s;
}

.company-progress .lab-card:hover {
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(2, 132, 199, 0.08);
}

.company-progress .openai-card .lab-profile {
  background:
    radial-gradient(circle at 92% 8%, rgba(125, 211, 252, 0.38), transparent 13rem),
    linear-gradient(150deg, #0c4a6e, #0284c7);
}

.company-progress .deepmind-card .lab-profile {
  background:
    radial-gradient(circle at 92% 8%, rgba(165, 180, 252, 0.32), transparent 13rem),
    linear-gradient(150deg, #312e81, #6366f1);
}

.company-progress .anthropic-card .lab-profile {
  background:
    radial-gradient(circle at 92% 8%, rgba(110, 231, 183, 0.3), transparent 13rem),
    linear-gradient(150deg, #065f46, #10b981);
}

.lab-index {
  border-radius: 8px;
  font-family: var(--mono);
  background: var(--blue);
}

.deepmind-card .lab-index { background: var(--indigo); }
.anthropic-card .lab-index { background: var(--em-deep); }

.deepmind-card header p { color: #4f46e5; }
.anthropic-card header p { color: var(--em-deep); }

/* 时间线（mono 年份 + 融合三色节点） */
.lab-timeline li {
  border-left: 1px solid var(--line);
}

.company-progress .lab-timeline li {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.company-progress .lab-timeline li::before {
  background: #0ea5e9;
  box-shadow: 0 0 0 1px #0ea5e9;
}

.company-progress .deepmind-card .lab-timeline li::before {
  background: var(--indigo);
  box-shadow: 0 0 0 1px var(--indigo);
}

.company-progress .anthropic-card .lab-timeline li::before {
  background: var(--em);
  box-shadow: 0 0 0 1px var(--em);
}

.company-progress .lab-timeline time {
  font-family: var(--mono);
  color: #0369a1;
}

.company-progress .deepmind-card .lab-timeline time { color: #4f46e5; }
.company-progress .anthropic-card .lab-timeline time { color: var(--em-deep); }

.lab-takeaway {
  border-left: 3px solid var(--em);
  color: #334155;
  background: #ecfdf5;
}

.research-focus span {
  border: 1px solid rgba(15, 23, 42, 0.08);
  color: #475569;
  background: #f1f5f9;
}

.company-progress .research-focus span {
  border-color: rgba(255, 255, 255, 0.18);
  color: rgba(255, 255, 255, 0.88);
  background: rgba(255, 255, 255, 0.09);
}

/* 拼图 / 阶段 / 审计（融合面板化） */
.puzzle-section {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #f1f5f9;
}

.puzzle-grid article {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
}

.puzzle-grid article > span {
  font-family: var(--mono);
  color: var(--blue);
}

.puzzle-grid strong {
  color: #0369a1;
  font-family: var(--mono);
}

.industry-analysis {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  box-shadow: none;
}

.analysis-stage-grid article {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
}

.analysis-stage-grid article > span {
  font-family: var(--mono);
  color: var(--blue);
}

.analysis-stage-grid h3 {
  color: #0f172a;
}

.analysis-stage-grid p {
  color: #64748b;
}

.claim-audit {
  border: 1px solid var(--line);
  border-radius: 10px;
}

.claim-audit-head {
  color: #334155;
  background: #f1f5f9;
}

.claim-audit-head span {
  color: var(--blue);
  font-family: var(--mono);
}

.claim-audit article {
  border-bottom: 1px solid var(--line);
}

.claim-audit h3 {
  color: #1e293b;
}

.claim-audit p {
  color: #64748b;
}

.claim-status {
  font-family: var(--mono);
  border: 1px solid transparent;
}

.claim-status.no-evidence { color: #475569; background: #f1f5f9; border-color: #e2e8f0; }
.claim-status.overreach { color: #b45309; background: #fffbeb; border-color: #fde68a; }
.claim-status.contradicted { color: #0369a1; background: #e0f2fe; border-color: #bae6fd; }

/* ---------- 二级导航（融合分段控件 fw-mode-seg） ---------- */
.research-subnav {
  gap: 2px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f1f5f9;
  box-shadow: none;
}

.research-subnav a {
  padding: 0.45rem 0.9rem;
  border-radius: 6px;
  color: #475569;
  font-weight: 600;
}

.research-subnav a:hover {
  color: #1e293b;
  background: transparent;
}

.research-subnav a.active {
  color: #1e293b;
  background: #fff;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.06);
}

.company-jump-nav a {
  border: 1px solid var(--line);
  border-radius: 6px;
  color: #475569;
  background: #fff;
  font-weight: 600;
}

.company-jump-nav a span {
  font-family: var(--mono);
  color: var(--blue);
}

.company-jump-nav a:hover {
  border-color: var(--blue);
  color: #1e293b;
}

/* ---------- 参与讨论页 ---------- */
.code-card {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  box-shadow: var(--shadow);
}

.code-card h3 {
  color: #0f172a;
}

.refresh-btn {
  min-height: 32px;
  border: 1px solid #cbd5e1;
  border-radius: 6px;
  color: #334155;
  background: #fff;
  font-size: 0.82rem;
}

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

/* ---------- 顶栏窄屏：始终单行（结构在 styles.css 的 ≤980px 块里） ---------- */
/* 本文件后加载，故字号/间距等视觉微调放这里才能真正生效。 */
@media (max-width: 980px) {
  .site-header {
    gap: 0.9rem;
  }

  .nav-links {
    gap: 1.1rem;
  }

  .nav-links a {
    padding: 1.05rem 0;
  }
}

@media (max-width: 720px) {
  .site-header {
    gap: 0.55rem;
    padding: 0 0.7rem;
  }

  .brand {
    gap: 0;
  }

  .brand-word {
    font-size: 1rem;
  }

  .nav-links {
    gap: 0.75rem;
    font-size: 0.78rem;
  }

  .nav-links a {
    padding: 1rem 0;
  }

  .header-action {
    min-height: 30px;
    padding: 0 0.62rem;
    font-size: 0.78rem;
    border-radius: 6px;
  }

  /* 窄屏省掉箭头，给导航让出宽度 */
  .header-action::after {
    display: none;
  }
}

/* 窄屏第二档（≤380px）：导航改为左对齐，避免右对齐时首项被裁掉、压在品牌上。 */
@media (max-width: 380px) {
  .site-header {
    gap: 0.45rem;
    padding: 0 0.5rem;
  }

  .brand-word {
    font-size: 0.9rem;
  }

  .nav-links {
    gap: 0.45rem;
    font-size: 0.72rem;
  }

  .nav-links a {
    padding: 1rem 0;
  }

  .header-action {
    min-height: 28px;
    padding: 0 0.5rem;
    font-size: 0.72rem;
  }
}

/* 极窄屏（≤340px，如 iPhone SE 320）：再降一档字号，保证四个菜单 + 品牌 + 按钮在同一行 */
@media (max-width: 340px) {
  .site-header {
    gap: 0.4rem;
    padding: 0 0.42rem;
  }

  .brand-word {
    font-size: 0.88rem;
  }

  .nav-links {
    /* 宽度真的不够时才放弃右对齐：右对齐溢出会把首项裁掉、压到品牌上 */
    justify-content: flex-start;
    gap: 0.34rem;
    font-size: 0.68rem;
  }

  .header-action {
    padding: 0 0.42rem;
    font-size: 0.68rem;
  }
}