/* ============================================================
   AI紫府 · 海外站 设计系统
   语言无关的共用样式，所有语种共享
   ============================================================ */

:root {
  /* 底色：墨 */
  --ink-900: #06050A;
  --ink-850: #0A0912;
  --ink-800: #0E0D18;
  --ink-700: #15131F;
  --ink-600: #1E1B2B;
  --ink-500: #2A2639;

  /* 主色：金 */
  --gold-300: #E7D4A0;
  --gold-400: #D8BE7E;
  --gold-500: #C9A961;
  --gold-600: #A88A48;

  /* 辅色：紫 */
  --violet-300: #B4A9E8;
  --violet-400: #9B8DDE;
  --violet-500: #8B7FD4;
  --violet-600: #6B60B0;

  /* 文字 */
  --text-100: #F2EEE6;
  --text-200: #D9D3C7;
  --text-300: #A8A296;
  --text-400: #78736A;
  --text-500: #524E47;

  /* 功能 */
  --line: rgba(201, 169, 97, 0.14);
  --line-soft: rgba(242, 238, 230, 0.07);
  --glow-gold: rgba(201, 169, 97, 0.22);
  --glow-violet: rgba(139, 127, 212, 0.18);

  --radius-sm: 6px;
  --radius: 12px;
  --radius-lg: 20px;

  --font-sans: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC",
    -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  --font-serif: "Songti SC", "Source Han Serif SC", "Noto Serif SC",
    "STSong", Georgia, serif;
  --font-mono: "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;

  --maxw: 1120px;
  --nav-h: 68px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--ink-900);
  color: var(--text-200);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* 星野底纹 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(circle at 14% 8%, rgba(139, 127, 212, 0.09), transparent 42%),
    radial-gradient(circle at 86% 18%, rgba(201, 169, 97, 0.07), transparent 40%),
    radial-gradient(circle at 50% 100%, rgba(107, 96, 176, 0.06), transparent 55%);
}

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

a { color: var(--gold-400); text-decoration: none; }
a:hover { color: var(--gold-300); }

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 600;
  color: var(--text-100);
  letter-spacing: 0.02em;
  line-height: 1.35;
  margin: 0;
}

p { margin: 0 0 1.1em; }
p:last-child { margin-bottom: 0; }

.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* ---------- 导航 ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: rgba(6, 5, 10, 0.82);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line-soft);
}

.nav .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-serif);
  font-size: 18px;
  color: var(--text-100);
  letter-spacing: 0.08em;
  white-space: nowrap;
}
.brand:hover { color: var(--text-100); }
.brand-mark {
  width: 28px;
  height: 28px;
  flex: 0 0 28px;
  border-radius: 50%;
  border: 1px solid var(--gold-600);
  display: grid;
  place-items: center;
  font-size: 13px;
  color: var(--gold-400);
  background: radial-gradient(circle at 30% 25%, var(--glow-gold), transparent 70%);
}
.brand-sub {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--text-400);
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
  font-size: 14px;
}
.nav-links a { color: var(--text-300); }
.nav-links a:hover { color: var(--gold-300); }

/* ---------- 语言切换 ---------- */
.lang {
  position: relative;
}
.lang-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--text-200);
  font-family: var(--font-sans);
  font-size: 13px;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
}
.lang-btn:hover {
  border-color: var(--gold-600);
  color: var(--gold-300);
}
.lang-btn svg { width: 13px; height: 13px; opacity: 0.7; }

.lang-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 176px;
  padding: 6px;
  background: var(--ink-700);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.6);
  display: none;
  flex-direction: column;
  gap: 2px;
}
.lang-menu.open { display: flex; }

.lang-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text-200);
  white-space: nowrap;
}
.lang-item:hover { background: var(--ink-600); color: var(--text-100); }
.lang-item .native { color: var(--text-300); font-size: 12px; }
.lang-item[aria-current="true"] { color: var(--gold-400); }
.lang-item.soon { opacity: 0.42; cursor: not-allowed; }
.lang-item.soon:hover { background: transparent; color: var(--text-200); }
.soon-tag {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  padding: 2px 5px;
  border: 1px solid var(--text-500);
  border-radius: 3px;
  color: var(--text-400);
}

/* ---------- 区块 ---------- */
section { padding: 96px 0; position: relative; }
section.tight { padding: 64px 0; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--gold-600);
  margin-bottom: 18px;
}

.sec-head { max-width: 720px; margin-bottom: 52px; }
.sec-head h2 { font-size: clamp(26px, 3.6vw, 38px); margin-bottom: 16px; }
.sec-head p { color: var(--text-300); font-size: 16px; }

/* ---------- Hero ---------- */
.hero {
  padding: 88px 0 72px;
  border-bottom: 1px solid var(--line-soft);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 56px;
  align-items: center;
}
.hero h1 {
  font-size: clamp(32px, 4.8vw, 54px);
  line-height: 1.24;
  margin-bottom: 24px;
}
.hero h1 em {
  font-style: normal;
  color: var(--gold-400);
}
.hero-lead {
  font-size: 17px;
  color: var(--text-300);
  max-width: 520px;
  margin-bottom: 32px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 999px;
  font-size: 15px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.18s, box-shadow 0.18s, background 0.18s;
}
.btn-primary {
  background: linear-gradient(135deg, var(--gold-500), var(--gold-600));
  color: #16120A;
  font-weight: 600;
}
.btn-primary:hover {
  color: #16120A;
  transform: translateY(-1px);
  box-shadow: 0 10px 30px var(--glow-gold);
}
.btn-ghost {
  border-color: var(--line);
  color: var(--text-200);
  background: transparent;
}
.btn-ghost:hover { border-color: var(--gold-600); color: var(--gold-300); }

/* 命盘 */
.chart-wrap {
  position: relative;
  aspect-ratio: 1;
  max-width: 440px;
  margin-left: auto;
}
.chart-wrap svg { width: 100%; height: 100%; }
.chart-spin { transform-origin: 50% 50%; animation: spin 180s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) {
  .chart-spin { animation: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 卡片 / 网格 ---------- */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.card {
  padding: 28px;
  background: linear-gradient(160deg, var(--ink-800), var(--ink-850));
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  transition: border-color 0.22s, transform 0.22s;
}
.card:hover { border-color: var(--line); transform: translateY(-2px); }
.card h3 { font-size: 18px; margin-bottom: 10px; }
.card p { font-size: 14.5px; color: var(--text-300); }
.card-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--violet-500);
  margin-bottom: 14px;
}

/* 数据条 */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  overflow: hidden;
}
.stat {
  padding: 26px 20px;
  background: var(--ink-850);
  text-align: center;
}
.stat b {
  display: block;
  font-family: var(--font-serif);
  font-size: 30px;
  color: var(--gold-400);
  margin-bottom: 6px;
  line-height: 1.2;
}
.stat span { font-size: 12.5px; color: var(--text-400); }

/* ---------- 对照表 ---------- */
.tbl {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
}
.tbl caption {
  text-align: left;
  font-size: 13px;
  color: var(--text-400);
  padding-bottom: 12px;
}
.tbl th, .tbl td {
  padding: 13px 16px;
  text-align: left;
  border-bottom: 1px solid var(--line-soft);
  vertical-align: top;
}
.tbl th {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold-600);
  font-weight: 500;
  border-bottom-color: var(--line);
}
.tbl tbody tr:last-child td { border-bottom: none; }
.tbl td:first-child { color: var(--text-100); }

/* ---------- FAQ ---------- */
.faq-item {
  border-bottom: 1px solid var(--line-soft);
  padding: 22px 0;
}
.faq-item:first-child { border-top: 1px solid var(--line-soft); }
.faq-item summary {
  cursor: pointer;
  list-style: none;
  font-family: var(--font-serif);
  font-size: 17px;
  color: var(--text-100);
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: flex-start;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--gold-600);
  flex: 0 0 auto;
  transition: transform 0.2s;
}
.faq-item[open] summary::after { content: "−"; }
.faq-body { padding-top: 12px; font-size: 15px; color: var(--text-300); }

/* ---------- 提示框 ---------- */
.note {
  padding: 18px 22px;
  border-left: 2px solid var(--violet-500);
  background: rgba(139, 127, 212, 0.06);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 14.5px;
  color: var(--text-300);
  margin: 26px 0;
}
.note strong { color: var(--violet-300); }

/* ---------- CTA ---------- */
.cta {
  text-align: center;
  padding: 88px 0;
  border-top: 1px solid var(--line-soft);
  background: radial-gradient(ellipse at 50% 0%, rgba(201, 169, 97, 0.06), transparent 65%);
}
.cta h2 { font-size: clamp(26px, 3.4vw, 36px); margin-bottom: 16px; }
.cta p { color: var(--text-300); max-width: 560px; margin: 0 auto 32px; }

/* ---------- 页脚 ---------- */
footer {
  padding: 52px 0 40px;
  border-top: 1px solid var(--line-soft);
  font-size: 13px;
  color: var(--text-400);
}
.foot-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 36px;
  margin-bottom: 36px;
}
.foot-grid h4 {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-500);
  margin-bottom: 14px;
  font-weight: 500;
}
.foot-grid ul { list-style: none; margin: 0; padding: 0; }
.foot-grid li { margin-bottom: 9px; }
.foot-grid a { color: var(--text-300); }
.foot-grid a:hover { color: var(--gold-300); }
.foot-legal {
  padding-top: 24px;
  border-top: 1px solid var(--line-soft);
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 12px;
  color: var(--text-500);
  line-height: 1.7;
}

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .chart-wrap { margin: 0 auto; max-width: 320px; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .nav-links { display: none; }
  section { padding: 68px 0; }
}

@media (max-width: 560px) {
  .wrap { padding: 0 18px; }
  .stats { grid-template-columns: 1fr 1fr; }
  .foot-grid { grid-template-columns: 1fr; gap: 26px; }
  .hero { padding: 56px 0 48px; }
}

/* ---------- 页脚语言列 ---------- */
.foot-lang { display: flex; flex-direction: column; gap: 2px; }
.foot-lang .lang-item {
  padding: 5px 0;
  font-size: 13px;
  color: var(--text-300);
  justify-content: flex-start;
  gap: 8px;
}
.foot-lang .lang-item .native { font-size: 11.5px; color: var(--text-500); }
.foot-lang .lang-item.soon { opacity: 0.4; }