/* 苏合 Exchange Buddy 官网共享样式 */

:root {
  /* PRD 色彩规范 */
  --sky-50:  #F0F9FF;
  --sky-100: #E0F2FE;
  --sky-200: #BAE6FD;
  --sky-300: #7DD3FC;
  --sky-400: #38BDF8;
  --sky-500: #0EA5E9;  /* PRD 主色 */
  --sky-600: #0284C7;
  --sky-700: #0369A1;
  --sky-800: #075985;
  --sky-900: #0C4A6E;

  --amber-400: #FBBF24;
  --amber-500: #F59E0B;  /* PRD 强调色 */
  --amber-600: #D97706;

  --positive: #10B981;  /* PRD 涨 */
  --negative: #EF4444;  /* PRD 跌 */

  /* 文字色（PRD 规范） */
  --ink-900: #1E293B;
  --ink-700: #334155;
  --ink-500: #64748B;
  --ink-400: #94A3B8;
  --ink-300: #CBD5E1;
  --ink-200: #E2E8F0;
  --ink-100: #F1F5F9;
  --ink-50:  #F8FAFC;  /* PRD 卡片背景 */

  --warning: #FCD34D;
  --warning-bg: #FEF3C7;

  --shadow-sm: 0 1px 2px 0 rgba(15, 31, 26, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 31, 26, 0.08), 0 2px 4px -2px rgba(15, 31, 26, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(15, 31, 26, 0.08), 0 4px 6px -4px rgba(15, 31, 26, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(15, 31, 26, 0.10), 0 8px 10px -6px rgba(15, 31, 26, 0.05);

  --radius-md: 12px;  /* PRD 按钮圆角 */
  --radius-lg: 16px;  /* PRD 卡片圆角 */
  --radius-xl: 20px;
  --container: 1200px;
  --gutter: 24px;

  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
               "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-serif: "Songti SC", "STSong", "PingFang SC", serif;
  --font-mono: "SF Mono", Menlo, Monaco, Consolas, "Courier New", monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--ink-700);
  background: #fff;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-size: 15px;
}
img { max-width: 100%; display: block; }
a { color: var(--sky-600); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--sky-500); }
ul { padding-left: 1.5em; margin: 0.5em 0; }
li { margin: 0.4em 0; }

.placeholder {
  display: inline-block;
  background: var(--warning);
  color: var(--ink-900);
  font-weight: 700;
  padding: 1px 10px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.85em;
  border: 1px dashed #d4a017;
  margin: 0 2px;
}
.placeholder::before { content: "XXXX"; }
.placeholder span {
  font-family: var(--font-sans);
  color: rgba(15, 31, 26, 0.55);
  font-size: 0.78em;
  font-weight: 400;
  margin-left: 4px;
  letter-spacing: 0.02em;
}

.nav {
  position: fixed; top: 0; left: 0; right: 0;
  height: 64px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(14, 165, 233, 0.08);
  z-index: 1000;
  transition: box-shadow 0.3s;
}
.nav.scrolled { box-shadow: var(--shadow-md); }
.nav-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; color: var(--ink-900);
  font-size: 18px;
}
.logo-mark {
  width: 36px; height: 36px;
  background: linear-gradient(135deg, var(--sky-400) 0%, var(--sky-600) 100%);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: white; font-weight: 700;
  font-family: var(--font-serif);
  font-size: 19px;
  box-shadow: 0 2px 8px rgba(14, 165, 233, 0.35);
}
.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.logo-text .cn { font-size: 16px; font-weight: 700; color: var(--ink-900); }
.logo-text .en { font-size: 11px; color: var(--ink-400); font-weight: 500; letter-spacing: 0.02em; }
.nav-right { display: flex; align-items: center; gap: 12px; }
.nav-links { display: flex; gap: 4px; list-style: none; margin: 0; padding: 0; }
.nav-links a {
  color: var(--ink-500);
  font-size: 14px;
  padding: 8px 14px;
  border-radius: 8px;
  transition: all 0.2s;
  font-weight: 500;
}
.nav-links a:hover { color: var(--sky-700); background: var(--sky-50); }
.nav-cta {
  background: var(--sky-500);
  color: white !important;
  padding: 8px 18px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.2s;
}
.nav-cta:hover {
  background: var(--sky-600) !important;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(14, 165, 233, 0.4);
}

footer {
  background: var(--ink-900);
  color: rgba(255,255,255,0.7);
  padding: 72px 0 32px;
  font-size: 13.5px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2.4fr 1fr 1fr;
  gap: 64px;
  margin-bottom: 48px;
}
.footer-brand .logo-mark { margin-bottom: 16px; }
.footer-brand .brand-name {
  font-size: 20px;
  font-weight: 700;
  margin: 0 0 4px;
  color: white;
}
.footer-brand .brand-en {
  font-size: 12px;
  color: rgba(255,255,255,0.5);
  margin: 0 0 12px;
  letter-spacing: 0.05em;
}
.footer-brand p {
  color: rgba(255,255,255,0.65);
  font-size: 13.5px;
  max-width: 360px;
  line-height: 1.75;
  margin: 0;
}
footer h4 {
  color: white;
  font-size: 14px;
  margin: 0 0 18px;
  font-weight: 600;
}
.footer-links { list-style: none; padding: 0; margin: 0; }
.footer-links li { margin: 10px 0; }
.footer-links a {
  color: rgba(255,255,255,0.7);
  font-size: 13px;
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--sky-300); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 28px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px 12px;
  color: rgba(255,255,255,0.55);
  font-size: 12.5px;
  align-items: center;
  text-align: center;
}
.footer-bottom .placeholder {
  background: rgba(252, 211, 77, 0.18);
  color: #FCD34D;
  border-color: rgba(252, 211, 77, 0.35);
}
.footer-bottom a { color: rgba(255,255,255,0.7); }
.footer-bottom a:hover { color: var(--sky-300); }
.footer-bottom .sep { color: rgba(255,255,255,0.3); }

section { padding: 96px 0; position: relative; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 var(--gutter); }
.eyebrow {
  color: var(--sky-600);
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 16px;
  display: inline-block;
}
h1, h2, h3, h4 {
  color: var(--ink-900);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.25;
}
h2.section-title { font-size: clamp(28px, 4vw, 40px); margin: 0 0 16px; }
.section-sub {
  color: var(--ink-500);
  font-size: 17px;
  max-width: 640px;
  margin: 0 0 56px;
}

.page-header {
  background: linear-gradient(180deg, var(--sky-50) 0%, white 100%);
  padding: 140px 0 56px;
  text-align: center;
  border-bottom: 1px solid var(--ink-100);
}
.page-header h1 { font-size: clamp(32px, 4.5vw, 44px); margin: 0 0 14px; }
.page-header .meta { color: var(--ink-400); font-size: 14px; margin: 0; }
.page-content { background: white; padding: 64px 0 80px; }
.page-content .container { max-width: 880px; }
.breadcrumb { color: var(--ink-400); font-size: 13px; margin: 0 0 32px; }
.breadcrumb a { color: var(--ink-500); }
.breadcrumb .sep { margin: 0 8px; color: var(--ink-300); }

.legal-body h2 {
  font-size: 22px;
  color: var(--ink-900);
  margin: 36px 0 14px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--sky-200);
}
.legal-body h2:first-child { margin-top: 0; }
.legal-body h3 { font-size: 17px; color: var(--ink-700); margin: 24px 0 8px; }
.legal-body p { font-size: 15px; line-height: 1.85; margin: 8px 0; color: var(--ink-700); }
.legal-body ul li { font-size: 15px; line-height: 1.85; }
.legal-body strong { color: var(--ink-900); }
.legal-body .notice {
  background: var(--warning-bg);
  border-left: 4px solid var(--warning);
  padding: 18px 22px;
  margin: 24px 0;
  border-radius: 4px;
  font-size: 15px;
}
.legal-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 14px;
}
.legal-body table th, .legal-body table td {
  padding: 12px 14px;
  text-align: left;
  border: 1px solid var(--ink-200);
  vertical-align: top;
}
.legal-body table th {
  background: var(--sky-50);
  font-weight: 600;
  color: var(--sky-900);
}
.legal-body table tr:nth-child(even) td { background: var(--ink-50); }
.sensitive {
  background: #FEE2E2;
  color: #991B1B;
  padding: 1px 6px;
  border-radius: 3px;
  font-weight: 600;
  font-size: 0.95em;
}

@media (max-width: 960px) {
  .nav-links { display: none; }
  .nav-cta { padding: 7px 14px; font-size: 13px; }
  .footer-grid { grid-template-columns: 1fr; gap: 36px; }
  section { padding: 64px 0; }
  .page-header { padding: 100px 0 40px; }
}