/* ============================================================
   百狐 AI 官网 · 静态可部署样式
   风格：暗底 + 橙色描边 UI（无大面积橙色色块）
   无任何外部依赖
   ============================================================ */

:root {
  --bg: #08080c;
  --bg-2: #0d0d14;
  --fg: #e8ebf2;
  --fg-soft: #a8aebd;
  --card: #0d0d14;
  --card-fg: #e8ebf2;
  --primary: #ff7a2e;
  --primary-fg: #08080c;
  --primary-soft: rgba(255, 122, 46, 0.08);
  --primary-line: rgba(255, 122, 46, 0.35);
  --primary-line-strong: rgba(255, 122, 46, 0.6);
  --muted: #14141c;
  --muted-fg: #8a8f9d;
  --border: #1d1d2a;
  --border-strong: #2a2a3a;
  --input: #1d1d2a;
  --ring: #ff7a2e;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 10px;
  --font-sans: "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-feature-settings: "kern", "tnum";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.6;
  min-height: 100vh;
}

/* 全局背景：极细的网格纹理 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(to right, rgba(255, 122, 46, 0.025) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 122, 46, 0.025) 1px, transparent 1px);
  background-size: 80px 80px;
}

body > * { position: relative; z-index: 1; }

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
input, textarea, select { font: inherit; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.container.narrow { max-width: 960px; }

/* ============================================================
   Header
   ============================================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  width: 100%;
  background: rgba(8, 8, 12, 0.7);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 1rem 1.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: -0.01em;
  color: var(--fg);
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary-line);
  overflow: hidden;
}

.brand-mark img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

.brand-word { color: var(--fg); }
.brand-accent { color: var(--primary); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  font-size: 0.875rem;
  color: var(--fg-soft);
  flex-wrap: wrap;
}

.nav-links a {
  transition: color .15s ease;
  position: relative;
}

.nav-links a:hover { color: var(--fg); }

.nav-links a[aria-current="page"] {
  color: var(--fg);
}

.nav-links a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1.45rem;
  height: 1px;
  background: var(--primary);
}

.nav-cta {
  padding: 0.45rem 0.9rem;
  font-size: 0.875rem;
}

/* ============================================================
   Buttons（描边风）
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.6rem 1.1rem;
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: 0.875rem;
  border: 1px solid transparent;
  transition: all .15s ease;
  white-space: nowrap;
  cursor: pointer;
}

.btn-primary {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}

.btn-primary:hover {
  background: var(--primary);
  color: var(--primary-fg);
}

.btn-ghost {
  background: transparent;
  color: var(--fg);
  border-color: var(--border-strong);
}

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

.btn-block { width: 100%; }

/* ============================================================
   Hero —— 描边 UI 风
   ============================================================ */

.hero {
  position: relative;
  padding: 5rem 0 4rem;
}

@media (min-width: 768px) {
  .hero { padding: 7rem 0 5rem; }
}

.hero-grid {
  display: grid;
  gap: 3rem;
  align-items: center;
}

@media (min-width: 1024px) {
  .hero-grid { grid-template-columns: 1.05fr 1fr; gap: 4rem; }
}

.hero-copy {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--primary);
  border: 1px solid var(--primary-line);
  align-self: flex-start;
  background: var(--primary-soft);
}

.eyebrow-dot {
  display: inline-block;
  width: 0.4rem;
  height: 0.4rem;
  border-radius: 999px;
  background: var(--primary);
  box-shadow: 0 0 8px var(--primary);
}

.hero-title {
  margin: 0;
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--fg);
}

.hero-title .accent { color: var(--primary); }

.hero-lead {
  margin: 0;
  max-width: 36rem;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--fg-soft);
}

@media (min-width: 768px) {
  .hero-lead { font-size: 1.05rem; }
}

.hero-cta { display: flex; flex-wrap: wrap; gap: 0.75rem; padding-top: 0.25rem; }

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
  margin-top: 0.5rem;
  padding-top: 1.25rem;
}

.hero-meta-item {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.hero-meta-label {
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted-fg);
}

.hero-meta-value {
  font-size: 0.9rem;
  color: var(--fg);
  font-family: var(--font-mono);
}

/* Hero 视觉：报告 UI 卡片组合 */
.hero-visual {
  position: relative;
}

.hero-frame {
  position: relative;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  background: var(--card);
  overflow: hidden;
}

.hero-frame img {
  width: 100%;
  height: auto;
  display: block;
}

.hero-badge {
  position: absolute;
  top: -0.6rem;
  left: 1.25rem;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--bg);
  color: var(--primary);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  border: 1px solid var(--primary-line);
}

/* ============================================================
   Sections（描边风）
   ============================================================ */

.section {
  border-top: 1px solid var(--border);
  padding: 5rem 0;
}

@media (min-width: 768px) {
  .section { padding: 6rem 0; }
}

.kicker {
  display: inline-block;
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 0.75rem;
}

.section-title {
  margin: 0 0 1rem;
  font-size: clamp(1.65rem, 3.5vw, 2.25rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--fg);
}

.muted { color: var(--fg-soft); margin: 0; }
.small { font-size: 0.875rem; }
.text-primary { color: var(--primary); }

.two-col {
  display: grid;
  gap: 3rem;
  align-items: start;
}

@media (min-width: 1024px) {
  .two-col { grid-template-columns: 1fr 1fr; gap: 4rem; }
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-end;
  gap: 1.25rem;
  margin-bottom: 3rem;
}

.section-sub { max-width: 28rem; }
.center { text-align: center; }

/* ============================================================
   Cards（描边风）
   ============================================================ */

.card {
  border: 1px solid var(--border-strong);
  background: var(--card);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  transition: border-color .2s ease;
}

.card:hover { border-color: var(--primary-line); }

@media (min-width: 768px) {
  .card { padding: 2rem; }
}

.card.is-featured {
  border-color: var(--primary-line);
  background: linear-gradient(180deg, var(--primary-soft), var(--card));
}

.card.featured {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  padding: 2rem;
}

@media (min-width: 768px) {
  .card.featured {
    grid-template-columns: 2fr auto;
    align-items: center;
    padding: 2.5rem;
  }
}

.featured-main { display: flex; flex-direction: column; gap: 0.9rem; }

.badge-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 500;
  border: 1px solid;
}

.status-live {
  background: var(--primary-soft);
  color: var(--primary);
  border-color: var(--primary-line);
}

.status-plan {
  background: transparent;
  color: var(--muted-fg);
  border-color: var(--border-strong);
}

.version {
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted-fg);
  font-family: var(--font-mono);
}

.featured-title {
  margin: 0;
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  color: var(--fg);
}

.chips { display: flex; flex-wrap: wrap; gap: 0.5rem; padding-top: 0.25rem; }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--fg-soft);
  border: 1px solid var(--border-strong);
  font-size: 0.72rem;
}

.chip svg { color: var(--primary); }

.featured-cta { display: flex; align-items: center; }

/* ============================================================
   About: facts grid
   ============================================================ */

.facts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.fact {
  border: 1px solid var(--border-strong);
  background: var(--card);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
}

.fact-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--muted-fg);
}

.fact-label svg { color: var(--primary); }

.fact-value {
  margin-top: 0.65rem;
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--fg);
}

.fact-value-multi {
  margin-top: 0.65rem;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--fg);
}

/* ============================================================
   Products preview (index) — 2-col grid
   ============================================================ */

.products-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1fr;
}

@media (min-width: 960px) {
  .products-grid { grid-template-columns: 1fr 1fr; gap: 1.5rem; }
}

.product-card {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  padding: 1.75rem;
  border: 1px solid var(--border-strong);
  background: var(--card);
  border-radius: var(--radius-lg);
  transition: border-color .2s ease, transform .2s ease;
  text-decoration: none;
  color: inherit;
  position: relative;
}

@media (min-width: 768px) {
  .product-card { padding: 2.25rem; }
}

.product-card:hover {
  border-color: var(--primary-line-strong);
}

.product-card.is-featured {
  border-color: var(--primary-line);
  background: linear-gradient(180deg, var(--primary-soft), var(--card));
}

.product-card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.product-card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary-line);
}

.product-card h3 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--fg);
  letter-spacing: -0.01em;
}

.product-card p {
  margin: 0;
  color: var(--fg-soft);
  line-height: 1.7;
}

.product-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: auto;
}

.product-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--fg-soft);
  border: 1px solid var(--border-strong);
  font-size: 0.72rem;
}

.product-card-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--primary);
  font-weight: 500;
  font-size: 0.875rem;
  margin-top: 0.25rem;
}

.product-card-cta::after {
  content: "→";
  transition: transform .2s ease;
}

.product-card:hover .product-card-cta::after { transform: translateX(3px); }

/* ============================================================
   Vision / pill values
   ============================================================ */

.vision {
  position: relative;
  background: var(--bg-2);
}

.vision-statement {
  margin: 1.5rem auto;
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--fg);
  max-width: 36rem;
}

.pillars { margin-top: 3rem; text-align: left; }

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

@media (min-width: 768px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
}

.card.pillar { background: var(--card); }

.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.icon-box {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary-line);
  flex-shrink: 0;
}

.icon-box.lg { width: 2.5rem; height: 2.5rem; }

.coming {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  background: transparent;
  color: var(--muted-fg);
  border: 1px solid var(--border-strong);
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.card-title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--fg);
}

/* ============================================================
   Analyst feature list (products page)
   ============================================================ */

.feature-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .feature-list { grid-template-columns: 1fr 1fr; gap: 1.25rem 2rem; }
}

.feature-item {
  display: flex;
  gap: 0.85rem;
}

.feature-body h5 {
  margin: 0 0 0.25rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--fg);
}

.feature-body p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--fg-soft);
}

/* 8 模块网格 */
.modules-grid {
  display: grid;
  gap: 0.6rem;
  grid-template-columns: repeat(2, 1fr);
}

@media (min-width: 768px) {
  .modules-grid { grid-template-columns: repeat(4, 1fr); }
}

.module-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.8rem 1rem;
  border-radius: var(--radius-md);
  background: transparent;
  border: 1px solid var(--border-strong);
  font-size: 0.85rem;
  color: var(--fg);
  line-height: 1.4;
}

.module-item .num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.4rem;
  height: 1.4rem;
  padding: 0 0.25rem;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary-line);
  font-size: 0.7rem;
  font-weight: 600;
  font-family: var(--font-mono);
  flex-shrink: 0;
}

/* free callout */
.free-bar {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  border: 1px solid var(--primary-line);
  font-size: 0.78rem;
  font-weight: 500;
}

.free-callout {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius-lg);
  background: transparent;
  border: 1px solid var(--primary-line);
}

.free-callout-text {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.free-callout-text strong { color: var(--fg); font-weight: 600; font-size: 1.05rem; }
.free-callout-text span { color: var(--fg-soft); font-size: 0.9rem; }

/* ============================================================
   Page-level hero (compact)
   ============================================================ */

.page-hero {
  position: relative;
  padding: 5rem 0 3rem;
  border-bottom: 1px solid var(--border);
}

.page-hero-inner {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  max-width: 44rem;
}

.page-hero-title {
  margin: 0;
  font-size: clamp(2rem, 4.5vw, 3rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--fg);
}

.page-hero-lead {
  margin: 0;
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--fg-soft);
  max-width: 40rem;
}

.breadcrumb {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.78rem;
  color: var(--muted-fg);
  margin-bottom: 0.75rem;
  font-family: var(--font-mono);
}

.breadcrumb a { transition: color .15s ease; }
.breadcrumb a:hover { color: var(--fg); }
.breadcrumb-sep { color: var(--muted-fg); opacity: 0.6; }
.breadcrumb-current { color: var(--fg); }

/* ============================================================
   Contact
   ============================================================ */

.contact-list {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.contact-list .icon-box {
  width: 2.25rem;
  height: 2.25rem;
  flex-shrink: 0;
}

.fact-text {
  color: var(--fg);
  font-size: 0.875rem;
  margin-top: 0.15rem;
}

.contact-form {
  border: 1px solid var(--border-strong);
  background: var(--card);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

@media (min-width: 768px) {
  .contact-form { padding: 2rem; }
}

.form-row {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}

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

.field { display: flex; flex-direction: column; gap: 0.4rem; }

.field input,
.field select,
.field textarea {
  width: 100%;
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  padding: 0.6rem 0.85rem;
  font: inherit;
  font-size: 0.875rem;
  outline: none;
  transition: border-color .15s ease;
}

.field input::placeholder,
.field textarea::placeholder { color: var(--muted-fg); }

.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--primary);
}

.field textarea { resize: vertical; min-height: 5.5rem; }

.form-note {
  margin: 0;
  padding: 0.75rem 1rem;
  background: var(--primary-soft);
  border: 1px solid var(--primary-line);
  border-radius: var(--radius-md);
  color: var(--primary);
  font-size: 0.875rem;
  text-align: center;
}

/* Static contact aside（无表单版） */
.contact-form-title {
  margin: 0 0 0.75rem;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--fg);
}

.contact-form .contact-list {
  margin-top: 1.25rem;
}

.contact-form-cta {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

/* ============================================================
   Footer
   ============================================================ */

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg);
}

.footer-grid {
  display: grid;
  gap: 2rem;
  padding: 3.5rem 1.5rem;
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
    gap: 2.5rem;
  }
}

.footer-tagline { margin-top: 0.5rem; max-width: 22rem; }

.footer-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  font-size: 0.875rem;
  color: var(--fg-soft);
  align-content: start;
}

.footer-nav a { transition: color .15s ease; }
.footer-nav a:hover { color: var(--fg); }

.footer-meta { display: flex; flex-direction: column; gap: 0.5rem; }

.footer-meta-row {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.footer-meta svg { color: var(--primary); }

.footer-bottom {
  border-top: 1px solid var(--border);
}

.footer-bottom-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

/* ============================================================
   Responsive: small phones
   ============================================================ */

@media (max-width: 640px) {
  .nav-links { order: 3; width: 100%; justify-content: flex-start; gap: 1rem; }
  .hero { padding: 3.5rem 0 2.5rem; }
  .facts { grid-template-columns: 1fr; }
  .card.featured { grid-template-columns: 1fr; }
}

/* ============================================================
   Accessibility
   ============================================================ */

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 1px solid var(--primary);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
  html { scroll-behavior: auto; }
}