/* =============================================================
   AvaTrade 外汇中文站  —  样式表
   配色取自 AvaTrade 品牌：深藏青底 + 珊瑚红强调色
   字体本土化：优先调用系统中文字体，无需外链
   ============================================================= */

:root {
  --navy-900: #060630;
  --navy-800: #0b0b45;
  --navy-700: #141466;
  --navy-600: #1d1d7a;
  --coral:    #ff4b5c;
  --coral-600:#e83b4c;
  --coral-50: #fff1f2;

  --ink:    #14141f;
  --slate:  #474c61;
  --muted:  #7b8096;
  --cloud:  #f5f7fc;
  --paper:  #ffffff;
  --line:   #e6e9f2;
  --line-strong: #d3d8e6;

  --radius: 14px;
  --radius-sm: 10px;
  --shadow-sm: 0 1px 2px rgba(11,11,69,.06), 0 4px 14px rgba(11,11,69,.05);
  --shadow-md: 0 10px 30px rgba(11,11,69,.10);

  --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB",
    "Source Han Sans CN", "Noto Sans SC", -apple-system, BlinkMacSystemFont,
    "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --maxw: 1160px;
}

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

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

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.78;
  font-size: 16px;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a { color: var(--coral-600); text-decoration: none; }
a:hover { color: var(--coral); }

h1, h2, h3, h4 { line-height: 1.3; font-weight: 700; letter-spacing: .005em; color: var(--ink); margin: 0; }

p { margin: 0 0 1em; }

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

.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--coral-600);
  margin-bottom: 14px;
}
.eyebrow.on-dark { color: #ff8a93; }

.section { padding: 84px 0; }
.section--tight { padding: 60px 0; }
.section-head { max-width: 640px; margin-bottom: 44px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section h2 { font-size: clamp(26px, 3.4vw, 38px); }
.section .lead { font-size: 17px; color: var(--slate); margin-top: 14px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: inherit; font-size: 15px; font-weight: 700;
  padding: 13px 26px; border-radius: 999px; border: 1.5px solid transparent;
  cursor: pointer; transition: transform .15s ease, background .2s ease, color .2s ease, border-color .2s ease;
  white-space: nowrap;
}
.btn--primary { background: var(--coral); color: #fff; }
.btn--primary:hover { background: var(--coral-600); color: #fff; transform: translateY(-1px); }
.btn--ghost { background: transparent; color: var(--navy-800); border-color: var(--line-strong); }
.btn--ghost:hover { border-color: var(--navy-800); color: var(--navy-800); }
.btn--on-dark { background: transparent; color: #fff; border-color: rgba(255,255,255,.4); }
.btn--on-dark:hover { background: rgba(255,255,255,.12); color: #fff; border-color: #fff; }
.btn--lg { padding: 16px 34px; font-size: 16px; }

/* ---------- 顶栏 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; gap: 28px; height: 70px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; color: var(--navy-800); font-size: 19px; letter-spacing: -.01em; }
.brand:hover { color: var(--navy-800); }
.brand .mark { width: 30px; height: 30px; }
.brand .brand-zh { font-size: 13px; font-weight: 700; color: var(--muted); letter-spacing: .04em; }

.nav-links { display: flex; align-items: center; gap: 26px; margin-left: 8px; }
.nav-links a {
  color: var(--slate); font-size: 15px; font-weight: 600; padding: 6px 0;
  border-bottom: 2px solid transparent;
}
.nav-links a:hover { color: var(--navy-800); border-bottom-color: var(--coral); }
.nav-links a.is-active { color: var(--navy-800); border-bottom-color: var(--coral); }

.nav-actions { margin-left: auto; display: flex; align-items: center; gap: 14px; }

/* CSS-only 移动菜单 */
.nav-toggle { display: none; }
.nav-burger {
  display: none; width: 42px; height: 42px; border: 1px solid var(--line-strong);
  border-radius: 10px; cursor: pointer; align-items: center; justify-content: center;
  background: #fff;
}
.nav-burger span, .nav-burger span::before, .nav-burger span::after {
  content: ""; display: block; width: 18px; height: 2px; background: var(--navy-800); position: relative; border-radius: 2px;
}
.nav-burger span::before { position: absolute; top: -6px; }
.nav-burger span::after { position: absolute; top: 6px; }

/* ---------- 英雄区 ---------- */
.hero {
  background:
    radial-gradient(1100px 520px at 82% -8%, rgba(255,75,92,.18), transparent 60%),
    radial-gradient(900px 600px at 8% 110%, rgba(29,29,122,.55), transparent 60%),
    linear-gradient(160deg, var(--navy-800) 0%, var(--navy-900) 100%);
  color: #fff; position: relative; overflow: hidden;
}
.hero .wrap { display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; padding-top: 78px; padding-bottom: 86px; }
.hero h1 { color: #fff; font-size: clamp(32px, 4.6vw, 54px); line-height: 1.18; letter-spacing: -.01em; }
.hero h1 .accent { color: var(--coral); }
.hero p { color: #c7cbe0; font-size: 18px; margin-top: 20px; max-width: 33ch; }
.hero-cta { display: flex; gap: 14px; margin-top: 30px; flex-wrap: wrap; }
.hero-meta { display: flex; gap: 30px; margin-top: 38px; flex-wrap: wrap; }
.hero-meta div { display: flex; flex-direction: column; }
.hero-meta b { font-size: 24px; color: #fff; }
.hero-meta span { font-size: 13px; color: #9aa0c2; letter-spacing: .03em; }

/* 英雄区视觉：地球 + 资产标签 */
.hero-visual { position: relative; }
.globe { width: 100%; max-width: 440px; margin-left: auto; }
.asset-chip {
  position: absolute; background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.16);
  color: #fff; font-size: 13px; font-weight: 600; padding: 8px 14px; border-radius: 999px;
  backdrop-filter: blur(4px); white-space: nowrap;
}
.asset-chip i { color: var(--coral); font-style: normal; margin-right: 6px; }
.c1 { top: 6%; left: 2%; }
.c2 { top: 30%; right: -2%; }
.c3 { bottom: 22%; left: -3%; }
.c4 { bottom: 4%; right: 8%; }

/* ---------- 信任条 ---------- */
.trust { background: var(--navy-900); border-top: 1px solid rgba(255,255,255,.06); }
.trust .wrap { display: flex; flex-wrap: wrap; gap: 14px 18px; padding: 22px 24px; align-items: center; justify-content: center; }
.trust span { color: #aeb3cf; font-size: 14px; font-weight: 600; }
.trust .dot { color: var(--coral); }

/* ---------- 通用网格卡片 ---------- */
.grid { display: grid; gap: 22px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; box-shadow: var(--shadow-sm);
}
.card h3 { font-size: 19px; margin-bottom: 10px; }
.card p { color: var(--slate); font-size: 15px; margin: 0; }
.card .ic {
  width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center;
  background: var(--coral-50); color: var(--coral-600); margin-bottom: 18px;
}
.card .ic svg { width: 24px; height: 24px; }

/* 市场卡片（首页） */
.market-card { display: flex; flex-direction: column; transition: transform .18s ease, box-shadow .2s ease; }
.market-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.market-card .tag { font-size: 12px; font-weight: 700; color: var(--coral-600); letter-spacing: .08em; margin-bottom: 8px; }

/* ---------- 步骤 ---------- */
.steps { counter-reset: step; display: grid; grid-template-columns: repeat(3,1fr); gap: 22px; }
.step { position: relative; padding-top: 14px; }
.step .num {
  font-size: 15px; font-weight: 800; color: #fff; background: var(--navy-800);
  width: 36px; height: 36px; border-radius: 10px; display: grid; place-items: center; margin-bottom: 16px;
}
.step h3 { font-size: 18px; margin-bottom: 8px; }
.step p { color: var(--slate); font-size: 15px; margin: 0; }

/* ---------- 首页 CTA 带 ---------- */
.cta-band { background: linear-gradient(135deg, var(--navy-700), var(--navy-900)); color: #fff; border-radius: 20px; padding: 56px; text-align: center; }
.cta-band h2 { color: #fff; font-size: clamp(24px, 3vw, 34px); }
.cta-band p { color: #c7cbe0; max-width: 52ch; margin: 14px auto 28px; }

/* ---------- 子页面头部 ---------- */
.page-hero {
  background:
    radial-gradient(800px 300px at 88% -40%, rgba(255,75,92,.2), transparent 60%),
    linear-gradient(160deg, var(--navy-800), var(--navy-900));
  color: #fff; padding: 70px 0 64px;
}
.page-hero .crumb { font-size: 13px; color: #9aa0c2; margin-bottom: 16px; letter-spacing: .03em; }
.page-hero .crumb a { color: #c7cbe0; }
.page-hero .crumb a:hover { color: #fff; }
.page-hero h1 { color: #fff; font-size: clamp(28px, 4vw, 44px); }
.page-hero p { color: #c7cbe0; font-size: 17px; max-width: 60ch; margin-top: 16px; }

/* ---------- 正文排版 ---------- */
.prose { max-width: 760px; }
.prose h2 { font-size: 26px; margin: 8px 0 16px; }
.prose h3 { font-size: 20px; margin: 30px 0 10px; }
.prose p { color: var(--slate); }
.prose ul { color: var(--slate); padding-left: 20px; margin: 0 0 1.2em; }
.prose li { margin-bottom: 8px; }
.prose li::marker { color: var(--coral); }

.feature-list { display: grid; gap: 16px; }
.feature-list .row { display: flex; gap: 14px; align-items: flex-start; padding: 18px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: #fff; }
.feature-list .row .ic { flex: 0 0 auto; width: 40px; height: 40px; border-radius: 10px; background: var(--coral-50); color: var(--coral-600); display: grid; place-items: center; }
.feature-list .row .ic svg { width: 22px; height: 22px; }
.feature-list .row h3 { font-size: 17px; margin-bottom: 4px; }
.feature-list .row p { font-size: 15px; color: var(--slate); margin: 0; }

.bg-cloud { background: var(--cloud); }

/* 监管表 */
.reg-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; }
.reg-item { border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 18px; background:#fff; }
.reg-item b { display: block; font-size: 15px; color: var(--navy-800); }
.reg-item span { font-size: 13.5px; color: var(--muted); }

/* FAQ（原生 details，无脚本） */
.faq { max-width: 820px; }
.faq details { border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 0 22px; margin-bottom: 12px; background: #fff; }
.faq summary {
  list-style: none; cursor: pointer; padding: 20px 0; font-weight: 700; font-size: 17px;
  display: flex; justify-content: space-between; align-items: center; gap: 16px; color: var(--ink);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-weight: 400; font-size: 24px; color: var(--coral); transition: transform .2s ease; }
.faq details[open] summary::after { content: "−"; }
.faq details > p { color: var(--slate); font-size: 15px; padding: 0 0 22px; margin: 0; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--navy-900); color: #c7cbe0; padding: 64px 0 30px; }
.footer-cols { display: grid; grid-template-columns: 1.6fr 1fr 1.2fr; gap: 40px; }
.footer-cols h4 { color: #fff; font-size: 15px; letter-spacing: .04em; margin-bottom: 18px; }
.footer-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.footer-brand .mark { width: 30px; height: 30px; }
.footer-brand b { color: #fff; font-size: 18px; font-weight: 800; }
.footer-cols p { font-size: 14.5px; color: #9aa0c2; line-height: 1.85; }
.footer-list { list-style: none; padding: 0; margin: 0; }
.footer-list li { font-size: 14.5px; color: #9aa0c2; padding: 5px 0; }
.footer-contact { font-size: 14.5px; color: #9aa0c2; }
.footer-contact span { display: block; padding: 4px 0; }
.footer-contact b { color: #c7cbe0; font-weight: 700; }

.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); margin-top: 48px; padding-top: 26px; }
.risk { font-size: 12.5px; color: #7b8099; line-height: 1.8; margin-bottom: 14px; }
.copyright { font-size: 13px; color: #9aa0c2; }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .hero .wrap { grid-template-columns: 1fr; gap: 30px; }
  .hero-visual { order: -1; max-width: 360px; }
  .grid-3, .grid-4, .steps, .reg-grid { grid-template-columns: 1fr 1fr; }
  .footer-cols { grid-template-columns: 1fr 1fr; }
  .footer-cols .col-intro { grid-column: 1 / -1; }
}

@media (max-width: 680px) {
  .nav-burger { display: inline-flex; }
  .nav-links {
    position: absolute; top: 70px; left: 0; right: 0; flex-direction: column; align-items: stretch;
    background: #fff; border-bottom: 1px solid var(--line); padding: 8px 24px 18px; gap: 0;
    box-shadow: var(--shadow-md); display: none;
  }
  .nav-links a { padding: 14px 0; border-bottom: 1px solid var(--line); }
  .nav-links a:hover { border-bottom-color: var(--line); }
  .nav-toggle:checked ~ .nav-links { display: flex; }
  .nav-actions .btn { display: none; }
  .nav-links .btn-mobile { display: inline-flex; margin-top: 14px; border-bottom: none; }

  .section { padding: 56px 0; }
  .grid-3, .grid-4, .steps, .reg-grid, .grid-2 { grid-template-columns: 1fr; }
  .footer-cols { grid-template-columns: 1fr; }
  .cta-band { padding: 38px 22px; }
  .hero-meta { gap: 22px; }
}

@media (min-width: 681px) { .nav-links .btn-mobile { display: none; } }

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