/* ==========================================================================
   71lab 站点样式
   视觉语言参考：charmplot.app / postbot.exmay.com/docs / tradingagents-cn.com
   产品品牌色：记易 薄荷绿 #3FBF9B ｜ 71QuantLab 靛蓝 #4F46E5 + 青 #22D3EE
   ========================================================================== */

/* ---------- 1. 令牌 ---------- */
:root {
  --mint: #3fbf9b;
  --mint-dark: #2fa683;
  --mint-light: #4ed0a9;
  --indigo: #4f46e5;
  --cyan: #22d3ee;
  --gold: #f59e0b;
  --gold-light: #fbbf24;
  --violet: #8b5cf6;
  --up: #fb7185;
  --down: #34d399;

  --radius-xs: 8px;
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-pill: 999px;

  --container: 1200px;
  --pad: 24px;
  --nav-h: 64px;

  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --t-fast: 0.2s;
  --t: 0.3s;
  --t-slow: 0.5s;

  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-display: "Plus Jakarta Sans", "Inter", -apple-system, "PingFang SC",
    "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0b1120;
  --surface: #0f172a;
  --surface-2: #16203a;
  --glass: rgba(15, 23, 42, 0.6);
  --glass-soft: rgba(255, 255, 255, 0.03);
  --border: rgba(255, 255, 255, 0.08);
  --border-soft: rgba(255, 255, 255, 0.05);
  --border-strong: rgba(255, 255, 255, 0.18);
  --t1: #f8fafc;
  --t2: #cbd5e1;
  --t3: #94a3b8;
  --t4: #64748b;
  --sh-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --sh-md: 0 4px 16px rgba(0, 0, 0, 0.35);
  --sh-lg: 0 8px 32px rgba(0, 0, 0, 0.37);
  --sh-xl: 0 24px 64px rgba(0, 0, 0, 0.45);
  --backdrop:
    radial-gradient(circle at 12% 6%, rgba(63, 191, 155, 0.1) 0%, transparent 30%),
    radial-gradient(circle at 88% 12%, rgba(79, 70, 229, 0.15) 0%, transparent 32%),
    radial-gradient(circle at 50% 98%, rgba(34, 211, 238, 0.07) 0%, transparent 36%),
    linear-gradient(160deg, #0b1120 0%, #0f1a2e 48%, #0a1016 100%);
  --grid-line: rgba(255, 255, 255, 0.045);
  --section-alt: rgba(15, 23, 42, 0.5);
}

[data-theme="light"] {
  color-scheme: light;
  --bg: #ffffff;
  --surface: #f8fafc;
  --surface-2: #ffffff;
  --glass: rgba(255, 255, 255, 0.72);
  --glass-soft: rgba(15, 23, 42, 0.025);
  --border: rgba(15, 23, 42, 0.1);
  --border-soft: rgba(15, 23, 42, 0.06);
  --border-strong: rgba(15, 23, 42, 0.2);
  --t1: #0f172a;
  --t2: #334155;
  --t3: #64748b;
  --t4: #94a3b8;
  --sh-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --sh-md: 0 4px 12px rgba(15, 23, 42, 0.07);
  --sh-lg: 0 10px 32px rgba(15, 23, 42, 0.09);
  --sh-xl: 0 24px 56px rgba(15, 23, 42, 0.12);
  --backdrop:
    radial-gradient(circle at 12% 6%, rgba(63, 191, 155, 0.12) 0%, transparent 30%),
    radial-gradient(circle at 88% 12%, rgba(79, 70, 229, 0.09) 0%, transparent 32%),
    radial-gradient(circle at 50% 98%, rgba(34, 211, 238, 0.07) 0%, transparent 36%),
    linear-gradient(160deg, #fbfdff 0%, #f6faff 50%, #f7fbf9 100%);
  --grid-line: rgba(15, 23, 42, 0.045);
  --section-alt: rgba(15, 23, 42, 0.02);
}

/* ---------- 2. 基础 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 20px); }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--t1);
  background: var(--backdrop) fixed, var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin: 0;
}
p { margin: 0; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
code, pre { font-family: var(--font-mono); }
button { font: inherit; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 var(--pad); }
.section { padding: 88px 0; position: relative; }
.section--alt { background: var(--section-alt); }
.section--tight { padding: 56px 0; }
.section-head { max-width: 720px; margin: 0 auto 56px; text-align: center; }
.section-head--left { margin-left: 0; text-align: left; }
.section-head h2 { font-size: clamp(1.65rem, 3.1vw, 2.4rem); margin-bottom: 14px; }
.section-head p { color: var(--t3); font-size: 1.0625rem; }
.eyebrow {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mint);
  margin-bottom: 12px;
}
.muted { color: var(--t3); }
.small { font-size: 0.875rem; }
.center { text-align: center; }

/* ---------- 3. 工具类 ---------- */
.glass {
  background: var(--glass-soft);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-soft);
}
.card {
  background: var(--glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--sh-lg);
}
.text-gradient {
  background: linear-gradient(120deg, var(--mint-light) 0%, var(--mint) 45%, var(--cyan) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.text-gradient--gold {
  background: linear-gradient(120deg, var(--gold-light), var(--gold));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.text-gradient--indigo {
  background: linear-gradient(120deg, #818cf8, var(--cyan));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.bg-grid {
  background-image:
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 40px 40px;
}
.divider { height: 1px; background: var(--border-soft); border: 0; margin: 0; }

@keyframes fadeInUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: none; } }
.fade-in-up { animation: fadeInUp 0.8s var(--ease) both; }
.d1 { animation-delay: 0.1s; } .d2 { animation-delay: 0.2s; } .d3 { animation-delay: 0.3s; } .d4 { animation-delay: 0.4s; }
@keyframes ping { 75%, 100% { transform: scale(2.2); opacity: 0; } }
@media (prefers-reduced-motion: reduce) {
  .fade-in-up { animation: none; }
  html { scroll-behavior: auto; }
}

/* 滚动条 */
* { scrollbar-width: thin; scrollbar-color: var(--border-strong) transparent; }
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--t4); }

/* ---------- 4. 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 22px; border-radius: var(--radius-pill);
  font-family: var(--font-display); font-weight: 600; font-size: 0.9rem;
  border: 1px solid transparent; cursor: pointer; white-space: nowrap;
  transition: transform var(--t-fast) var(--ease), box-shadow var(--t) var(--ease),
              background-color var(--t) var(--ease), border-color var(--t) var(--ease);
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn svg { width: 16px; height: 16px; flex: none; }
.btn--primary { background: linear-gradient(135deg, var(--mint), var(--mint-dark)); color: #04211a; box-shadow: 0 8px 24px rgba(63, 191, 155, 0.3); }
.btn--indigo { background: linear-gradient(135deg, var(--indigo), #6366f1); color: #fff; box-shadow: 0 8px 24px rgba(79, 70, 229, 0.32); }
.btn--gold { background: linear-gradient(135deg, var(--gold-light), var(--gold)); color: #3a2400; box-shadow: 0 8px 24px rgba(245, 158, 11, 0.28); }
.btn--ghost { background: var(--glass-soft); border-color: var(--border); color: var(--t1); backdrop-filter: blur(8px); }
.btn--ghost:hover { border-color: var(--border-strong); background: var(--glass); }
.btn--sm { padding: 8px 16px; font-size: 0.85rem; }
.btn--lg { padding: 14px 30px; font-size: 1rem; }
.btn--block { width: 100%; }
.btn--disabled { opacity: 0.45; pointer-events: none; }

.icon-btn {
  width: 36px; height: 36px; border-radius: var(--radius-pill);
  display: grid; place-items: center; cursor: pointer;
  background: var(--glass-soft); border: 1px solid var(--border); color: var(--t2);
  transition: all var(--t-fast) var(--ease);
}
.icon-btn:hover { color: var(--mint); border-color: var(--border-strong); }
.icon-btn svg { width: 17px; height: 17px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
[data-theme="dark"] .i-sun { display: none; }
[data-theme="light"] .i-moon { display: none; }

/* 语言切换 */
.lang-btn {
  height: 36px; padding: 0 14px; border-radius: var(--radius-pill);
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--glass-soft); border: 1px solid var(--border); color: var(--t2);
  font-family: var(--font-display); font-size: 0.8125rem; font-weight: 600; letter-spacing: 0.02em;
  cursor: pointer; white-space: nowrap;
  transition: all var(--t-fast) var(--ease);
}
.lang-btn:hover { color: var(--mint); border-color: var(--border-strong); }

/* 代码块复制按钮 */
.code-copy {
  position: absolute; top: 10px; right: 10px;
  font-size: 12px; padding: 4px 10px; border-radius: var(--radius-pill);
  border: 1px solid var(--border); background: var(--surface-2); color: var(--t3);
  cursor: pointer; font-family: var(--font);
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.code-copy:hover { color: var(--mint); border-color: var(--border-strong); }

/* ---------- 5. 导航 ---------- */
.nav {
  position: sticky; top: 0; z-index: 60;
  height: var(--nav-h);
  background: color-mix(in srgb, var(--bg) 76%, transparent);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-soft);
}
.nav__inner { display: flex; align-items: center; gap: 20px; height: 100%; }
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 800; font-size: 1.05rem; }
.brand__logo { width: 30px; height: 30px; flex: none; object-fit: contain; }
.brand__logo--lg { width: 34px; height: 34px; }
/* 主标是白字透明底：浅色主题下反相成黑字 */
[data-theme="light"] .brand__logo { filter: invert(1); }
.nav__links { display: flex; gap: 22px; margin-left: 14px; }
.nav__link {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 0.9rem; color: var(--t3); white-space: nowrap;
  background: none; border: 0; padding: 0; cursor: pointer; font-family: inherit;
  transition: color var(--t-fast) var(--ease);
}
.nav__link:hover, .nav__link.is-active { color: var(--t1); }
.nav__caret { width: 12px; height: 12px; fill: none; stroke: currentColor; stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; }

/* 下拉分组 */
.nav__item { position: relative; display: flex; align-items: center; }
.nav__menu {
  position: absolute; top: calc(100% + 14px); left: 50%; transform: translate(-50%, -6px);
  min-width: 176px; padding: 6px;
  border: 1px solid var(--border); border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--surface-2) 96%, transparent);
  backdrop-filter: blur(16px); box-shadow: var(--sh-xl);
  opacity: 0; visibility: hidden; pointer-events: none;
  transition: opacity var(--t-fast) var(--ease), transform var(--t-fast) var(--ease), visibility var(--t-fast);
}
.nav__item--menu::after { content: ""; position: absolute; left: 0; right: 0; top: 100%; height: 16px; }
.nav__item--menu:hover .nav__menu,
.nav__item--menu:focus-within .nav__menu,
.nav__item--menu.is-open .nav__menu {
  opacity: 1; visibility: visible; pointer-events: auto; transform: translate(-50%, 0);
}
.nav__menu a {
  display: block; padding: 9px 12px; border-radius: var(--radius-xs);
  font-size: 0.9rem; color: var(--t2); white-space: nowrap;
  transition: background-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.nav__menu a:hover { background: var(--glass-soft); color: var(--t1); }
.nav__menu a.is-active { color: var(--mint); }

.nav__actions { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.nav__toggle { display: none; }

@media (max-width: 1080px) {
  .nav__links { gap: 16px; margin-left: 6px; }
}
@media (max-width: 960px) {
  .nav__links {
    position: fixed; inset: var(--nav-h) 0 auto 0;
    flex-direction: column; gap: 0; margin: 0;
    background: color-mix(in srgb, var(--bg) 97%, transparent);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 8px var(--pad) 20px;
    transform: translateY(-8px); opacity: 0; pointer-events: none;
    transition: opacity var(--t) var(--ease), transform var(--t) var(--ease);
  }
  .nav__links.is-open { opacity: 1; transform: none; pointer-events: auto; }
  .nav__link { padding: 13px 0; border-bottom: 1px solid var(--border-soft); font-size: 1rem; width: 100%; justify-content: space-between; }
  .nav__item { display: block; }
  /* 抽屉里分组默认展开，子项缩进 */
  .nav__item--menu .nav__menu {
    position: static; transform: none; min-width: 0; padding: 0 0 6px;
    opacity: 1; visibility: visible; pointer-events: auto;
    border: 0; border-bottom: 1px solid var(--border-soft);
    background: none; backdrop-filter: none; box-shadow: none;
  }
  .nav__menu a { padding: 11px 0 11px 18px; font-size: 0.9375rem; }
  .nav__caret { display: none; }
  .nav__toggle { display: grid; }
}

/* ---------- 6. Hero ---------- */
.hero { padding: calc(88px + 16px) 0 88px; text-align: center; position: relative; overflow: hidden; }
.hero--compact { padding: 64px 0 56px; text-align: left; }
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse 62% 58% at 50% 26%, #000 0%, transparent 76%);
  -webkit-mask-image: radial-gradient(ellipse 62% 58% at 50% 26%, #000 0%, transparent 76%);
}
.hero > .container { position: relative; }
.hero__logo { width: 76px; height: 76px; margin: 0 auto 24px; object-fit: contain; }
[data-theme="light"] .hero__logo { filter: invert(1); }
.hero h1 { font-size: clamp(2.1rem, 5vw, 3.75rem); margin-bottom: 20px; }
.hero h1 .sub { display: block; font-size: 0.55em; font-weight: 600; color: var(--t3); margin-top: 10px; letter-spacing: -0.01em; }
.hero__lede { max-width: 620px; margin: 0 auto 28px; color: var(--t3); font-size: 1.1rem; }
.hero--compact .hero__lede { margin-left: 0; }
.hero__actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-bottom: 26px; }
.hero--compact .hero__actions { justify-content: flex-start; }
.hero__trust { display: flex; gap: 22px; justify-content: center; flex-wrap: wrap; font-size: 0.85rem; color: var(--t4); }
.hero--compact .hero__trust { justify-content: flex-start; }
.hero__trust span { display: inline-flex; align-items: center; gap: 7px; }
.hero__trust svg { width: 14px; height: 14px; fill: none; stroke: var(--mint); stroke-width: 2.5; stroke-linecap: round; stroke-linejoin: round; }

.badge {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 6px 14px 6px 10px; border-radius: var(--radius-pill);
  border: 1px solid var(--border); background: var(--glass-soft);
  backdrop-filter: blur(8px); font-size: 0.8125rem; color: var(--t2);
  margin-bottom: 24px;
}
.badge__dot { position: relative; width: 7px; height: 7px; flex: none; }
.badge__dot i { position: absolute; inset: 0; border-radius: 50%; background: var(--mint); display: block; }
.badge__dot i:first-child { animation: ping 2s cubic-bezier(0, 0, 0.2, 1) infinite; }
.badge b { color: var(--mint); font-family: var(--font-display); }

/* ---------- 7. 指标条 ---------- */
.metrics { border-top: 1px solid var(--border-soft); border-bottom: 1px solid var(--border-soft); background: var(--section-alt); }
.metrics__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; padding: 28px 0; }
.metric { text-align: center; }
.metric b { display: block; font-family: var(--font-display); font-size: clamp(1.4rem, 2.5vw, 1.9rem); font-weight: 800; color: var(--mint); }
.metric span { font-size: 0.85rem; color: var(--t4); }

/* ---------- 8. 网格与卡片 ---------- */
.grid { display: grid; gap: 20px; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 980px) { .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 700px) { .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; } }

.feature {
  background: var(--glass); backdrop-filter: blur(12px);
  border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 28px; box-shadow: var(--sh-lg);
  transition: transform var(--t) var(--ease), border-color var(--t) var(--ease), box-shadow var(--t) var(--ease);
}
.feature:hover { transform: translateY(-4px); border-color: var(--border-strong); box-shadow: var(--sh-xl); }
.feature__icon {
  width: 44px; height: 44px; border-radius: var(--radius-sm); display: grid; place-items: center;
  font-size: 20px; margin-bottom: 16px;
  background: color-mix(in srgb, var(--mint) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--mint) 24%, transparent);
}
.feature__icon--indigo { background: color-mix(in srgb, var(--indigo) 16%, transparent); border-color: color-mix(in srgb, var(--indigo) 30%, transparent); }
.feature__icon--cyan { background: color-mix(in srgb, var(--cyan) 12%, transparent); border-color: color-mix(in srgb, var(--cyan) 26%, transparent); }
.feature__icon--gold { background: color-mix(in srgb, var(--gold) 12%, transparent); border-color: color-mix(in srgb, var(--gold) 26%, transparent); }
.feature__icon--mint { background: color-mix(in srgb, var(--mint) 12%, transparent); border-color: color-mix(in srgb, var(--mint) 24%, transparent); }
.feature h3 { font-size: 1.0625rem; margin-bottom: 8px; }
.feature p { color: var(--t3); font-size: 0.9375rem; }

/* ---------- 9. 产品卡 ---------- */
.product {
  position: relative; overflow: hidden;
  border: 1px solid var(--border); border-radius: var(--radius-xl);
  background: var(--glass); backdrop-filter: blur(12px);
  box-shadow: var(--sh-lg); padding: 32px;
  display: flex; flex-direction: column;
  transition: transform var(--t) var(--ease), border-color var(--t) var(--ease), box-shadow var(--t) var(--ease);
}
.product::after {
  content: ""; position: absolute; inset: -1px -1px auto; height: 2px;
  background: var(--product-accent, linear-gradient(90deg, var(--mint), var(--cyan)));
  opacity: 0.9;
}
.product:hover { transform: translateY(-5px); border-color: var(--border-strong); box-shadow: var(--sh-xl); }
.product--jiyi { --product-accent: linear-gradient(90deg, #3fbf9b, #4ed0a9, #6ee7c4); }
.product--quantlab { --product-accent: linear-gradient(90deg, #4f46e5, #6366f1, #22d3ee); }
.product__head { display: flex; align-items: flex-start; gap: 16px; margin-bottom: 18px; }
.product__logo {
  width: 60px; height: 60px; border-radius: 16px; flex: none;
  display: grid; place-items: center; overflow: hidden;
  border: 1px solid var(--border); background: var(--surface-2);
}
.product__logo img { width: 100%; height: 100%; object-fit: cover; }
.product__title { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.product__title h3 { font-size: 1.25rem; }
.product__tag { font-size: 0.75rem; color: var(--t4); font-family: var(--font-mono); }
.product__desc { color: var(--t3); font-size: 0.9375rem; margin-bottom: 18px; }
.product__meta { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 20px; }
.chip {
  font-size: 0.75rem; padding: 3px 10px; border-radius: var(--radius-pill);
  border: 1px solid var(--border); color: var(--t3); background: var(--glass-soft);
}
.chip--mint { color: var(--mint); border-color: color-mix(in srgb, var(--mint) 32%, transparent); background: color-mix(in srgb, var(--mint) 10%, transparent); }
.chip--indigo { color: #a5b4fc; border-color: color-mix(in srgb, var(--indigo) 40%, transparent); background: color-mix(in srgb, var(--indigo) 14%, transparent); }
.chip--gold { color: var(--gold-light); border-color: color-mix(in srgb, var(--gold) 36%, transparent); background: color-mix(in srgb, var(--gold) 10%, transparent); }
.product__actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: auto; }

/* ---------- 10. 步骤 / 时间线 ---------- */
.step { padding: 20px 0; border-top: 1px solid var(--border-soft); }
.step b {
  display: block; font-family: var(--font-display); font-size: 1.6rem; font-weight: 800;
  margin-bottom: 10px;
  background: linear-gradient(120deg, var(--mint-light), var(--mint));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.step h3 { font-size: 1.0625rem; margin-bottom: 6px; }
.step p { color: var(--t3); font-size: 0.9375rem; }

/* ---------- 11. 价格 ---------- */
.price-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; align-items: stretch; }
@media (max-width: 900px) { .price-grid { grid-template-columns: 1fr; } }
.price {
  position: relative; display: flex; flex-direction: column;
  background: var(--glass); backdrop-filter: blur(12px);
  border: 1px solid var(--border); border-radius: var(--radius-xl);
  padding: 30px; box-shadow: var(--sh-lg);
}
.price--featured {
  border-color: color-mix(in srgb, var(--gold) 45%, transparent);
  box-shadow: var(--sh-xl), 0 0 0 1px color-mix(in srgb, var(--gold) 20%, transparent);
}
.price__tag {
  position: absolute; top: -11px; right: 26px;
  font-family: var(--font-display); font-size: 0.6875rem; font-weight: 700;
  letter-spacing: 0.08em; padding: 4px 12px; border-radius: var(--radius-pill);
  background: linear-gradient(135deg, var(--gold-light), var(--gold)); color: #3a2400;
}
.price h3 { font-size: 1.125rem; margin-bottom: 6px; }
.price__amount { font-family: var(--font-display); font-size: 2.2rem; font-weight: 800; line-height: 1.2; }
.price__amount small { font-size: 0.9rem; font-weight: 500; color: var(--t4); margin-left: 4px; }
.price__note { color: var(--t4); font-size: 0.875rem; margin-bottom: 20px; }
.price ul { list-style: none; margin: 0 0 24px; padding: 0; display: grid; gap: 10px; flex: 1; }
.price li { display: flex; gap: 10px; align-items: flex-start; font-size: 0.9375rem; color: var(--t2); }
.price li svg { width: 16px; height: 16px; flex: none; margin-top: 5px; fill: none; stroke: var(--mint); stroke-width: 2.5; stroke-linecap: round; stroke-linejoin: round; }
.price li.is-off { color: var(--t4); }
.price li.is-off svg { stroke: var(--t4); }

/* ---------- 12. 对比表 ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius-lg); background: var(--glass); backdrop-filter: blur(12px); box-shadow: var(--sh-lg); }
table.cmp { width: 100%; border-collapse: collapse; font-size: 0.9375rem; min-width: 620px; }
table.cmp th, table.cmp td { padding: 13px 18px; text-align: left; border-bottom: 1px solid var(--border-soft); }
table.cmp thead th { font-family: var(--font-display); font-weight: 700; font-size: 0.875rem; color: var(--t2); background: var(--glass-soft); position: sticky; top: 0; backdrop-filter: blur(8px); }
table.cmp tbody tr:last-child td { border-bottom: 0; }
table.cmp td.c { text-align: center; width: 130px; }
table.cmp .yes { color: var(--mint); font-weight: 700; }
table.cmp .no { color: var(--t4); }
table.cmp tbody tr:hover { background: var(--glass-soft); }

/* ---------- 13. FAQ ---------- */
.faq { display: grid; gap: 12px; }
.faq details {
  border: 1px solid var(--border); border-radius: var(--radius-md);
  background: var(--glass); backdrop-filter: blur(12px); overflow: hidden;
  transition: border-color var(--t) var(--ease);
}
.faq details[open] { border-color: var(--border-strong); }
.faq summary {
  display: flex; align-items: center; gap: 12px; padding: 16px 20px;
  cursor: pointer; list-style: none; font-family: var(--font-display); font-weight: 600; font-size: 1rem;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ""; margin-left: auto; width: 9px; height: 9px; flex: none;
  border-right: 2px solid var(--t4); border-bottom: 2px solid var(--t4);
  transform: rotate(45deg); transition: transform var(--t) var(--ease);
}
.faq details[open] summary::after { transform: rotate(-135deg); }
.faq__body { padding: 0 20px 20px; color: var(--t3); font-size: 0.9375rem; }
.faq__body p + p { margin-top: 10px; }

/* ---------- 14. CTA 面板 ---------- */
.cta {
  text-align: center; padding: 72px 32px; position: relative; overflow: hidden;
  border: 1px solid var(--border); border-radius: var(--radius-xl);
  background: radial-gradient(circle at 50% 0%, color-mix(in srgb, var(--mint) 14%, transparent), transparent 62%), var(--glass);
  backdrop-filter: blur(12px); box-shadow: var(--sh-xl);
}
.cta h2 { font-size: clamp(1.6rem, 3vw, 2.3rem); margin-bottom: 14px; }
.cta p { color: var(--t3); margin-bottom: 26px; }
.cta .hero__actions { margin-bottom: 0; }

/* ---------- 15. 页脚 ---------- */
.footer { border-top: 1px solid var(--border-soft); padding: 56px 0 28px; margin-top: 88px; }
.footer__grid { display: grid; grid-template-columns: 1.7fr repeat(3, 1fr); gap: 32px; }
.footer h4 { font-size: 0.75rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--t4); margin: 0 0 16px; font-weight: 600; }
.footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.footer li a, .footer li span { font-size: 0.9rem; color: var(--t3); }
.footer li a:hover { color: var(--t1); }
.footer__about { color: var(--t4); font-size: 0.9rem; max-width: 300px; margin-top: 12px; }
.footer__bottom {
  margin-top: 40px; padding-top: 22px; border-top: 1px solid var(--border-soft);
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  font-size: 0.8125rem; color: var(--t4);
}
@media (max-width: 900px) { .footer__grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .footer__grid { grid-template-columns: 1fr; } }

/* ---------- 16. 截图框 ---------- */
.shot {
  border: 1px solid var(--border); border-radius: var(--radius-xl);
  background: var(--glass); backdrop-filter: blur(12px);
  box-shadow: var(--sh-xl); overflow: hidden;
}
.shot__bar { display: flex; align-items: center; gap: 8px; padding: 12px 16px; border-bottom: 1px solid var(--border-soft); }
.shot__bar i { width: 10px; height: 10px; border-radius: 50%; background: var(--border-strong); }
.shot__bar span { margin-left: auto; font-family: var(--font-mono); font-size: 0.75rem; color: var(--t4); }
.shot__body { padding: 20px; display: grid; gap: 16px; place-items: center; }
.shot__body img { border-radius: var(--radius-sm); border: 1px solid var(--border-soft); }

.phones { display: flex; gap: 24px; justify-content: center; flex-wrap: wrap; }
.phone {
  width: 240px; flex: none;
  border-radius: 28px; padding: 8px;
  border: 1px solid var(--border); background: var(--surface-2);
  box-shadow: var(--sh-xl);
}
.phone img { border-radius: 21px; width: 100%; }
.phone__cap { text-align: center; font-size: 0.8125rem; color: var(--t4); margin-top: 14px; }

/* ---------- 17. 文档页 ---------- */
.doc { display: grid; grid-template-columns: 236px minmax(0, 1fr); gap: 48px; align-items: start; padding: 40px 0 88px; }
.doc__side { position: sticky; top: calc(var(--nav-h) + 24px); max-height: calc(100vh - var(--nav-h) - 48px); overflow-y: auto; }
.doc__side h4 { font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--t4); margin: 22px 0 10px; font-weight: 600; }
.doc__side h4:first-child { margin-top: 0; }
.doc__side ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; border-left: 1px solid var(--border-soft); }
.doc__side a {
  display: block; padding: 6px 0 6px 14px; font-size: 0.875rem; color: var(--t3);
  border-left: 2px solid transparent; margin-left: -1px;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.doc__side a:hover { color: var(--t1); }
.doc__side a.is-active { color: var(--mint); border-left-color: var(--mint); }

.article { min-width: 0; }
.article > * + * { margin-top: 18px; }
.article h2 {
  font-size: 1.6rem; margin-top: 52px; padding-top: 24px; border-top: 1px solid var(--border-soft);
  scroll-margin-top: calc(var(--nav-h) + 20px);
}
.article h2:first-child { margin-top: 0; padding-top: 0; border-top: 0; }
.article h3 { font-size: 1.15rem; margin-top: 32px; scroll-margin-top: calc(var(--nav-h) + 20px); }
.article h4 { font-size: 1rem; margin-top: 24px; color: var(--t2); }
.article p, .article li { color: var(--t2); font-size: 0.9688rem; }
.article ul, .article ol { padding-left: 1.4rem; margin: 0; display: grid; gap: 8px; }
.article li::marker { color: var(--t4); }
.article strong { color: var(--t1); font-weight: 650; }
.article a:not(.btn) { color: var(--mint); border-bottom: 1px solid color-mix(in srgb, var(--mint) 35%, transparent); }
.article a:not(.btn):hover { border-bottom-color: var(--mint); }
.article code {
  font-size: 0.85em; padding: 2px 6px; border-radius: 6px;
  background: var(--glass-soft); border: 1px solid var(--border-soft); color: var(--mint-light);
}
.article pre {
  background: color-mix(in srgb, var(--bg) 70%, transparent);
  border: 1px solid var(--border-soft); border-radius: var(--radius-sm);
  padding: 18px 20px; overflow-x: auto; font-size: 0.8125rem; line-height: 1.85;
  color: var(--t2);
}
.article pre code { background: none; border: 0; padding: 0; color: inherit; }
.article blockquote {
  margin: 0; padding: 14px 20px; border-left: 3px solid var(--mint);
  background: color-mix(in srgb, var(--mint) 7%, transparent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0; color: var(--t2);
}
.article hr { border: 0; height: 1px; background: var(--border-soft); margin: 40px 0; }
.article table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.article table th, .article table td { padding: 11px 14px; text-align: left; border-bottom: 1px solid var(--border-soft); }
.article table th { color: var(--t2); font-weight: 600; background: var(--glass-soft); }
.article table td { color: var(--t2); }
.article .table-wrap { margin: 18px 0; }
.article img { border-radius: var(--radius-sm); border: 1px solid var(--border-soft); }

.callout {
  display: flex; gap: 12px; padding: 16px 20px; border-radius: var(--radius-md);
  border: 1px solid var(--border); background: var(--glass-soft); font-size: 0.9375rem; color: var(--t2);
}
.callout__icon { flex: none; font-size: 1.05rem; line-height: 1.6; }
.callout--tip { border-color: color-mix(in srgb, var(--mint) 32%, transparent); background: color-mix(in srgb, var(--mint) 8%, transparent); }
.callout--warn { border-color: color-mix(in srgb, var(--gold) 34%, transparent); background: color-mix(in srgb, var(--gold) 8%, transparent); }

@media (max-width: 980px) {
  .doc { grid-template-columns: 1fr; gap: 0; }
  .doc__side { position: static; max-height: none; margin-bottom: 32px; padding-bottom: 24px; border-bottom: 1px solid var(--border-soft); }
}

/* ---------- 18. 表单 ---------- */
.field { display: grid; gap: 7px; }
.field label { font-size: 0.875rem; color: var(--t2); font-weight: 500; }
.field .hint { font-size: 0.8125rem; color: var(--t4); }
.input, .textarea, .select {
  width: 100%; padding: 11px 14px; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--glass-soft); color: var(--t1);
  font-family: inherit; font-size: 0.9375rem;
  transition: border-color var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease);
}
.input::placeholder, .textarea::placeholder { color: var(--t4); }
.input:focus, .textarea:focus, .select:focus {
  outline: none; border-color: var(--mint);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--mint) 18%, transparent);
}
.textarea { min-height: 130px; resize: vertical; line-height: 1.7; }
.select { appearance: none; cursor: pointer; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-grid .col-span { grid-column: 1 / -1; }
@media (max-width: 700px) { .form-grid { grid-template-columns: 1fr; } }

/* ---------- 19. 联系 / 打赏 ---------- */
.contact-card {
  display: flex; gap: 16px; align-items: flex-start; padding: 24px;
  border: 1px solid var(--border); border-radius: var(--radius-lg);
  background: var(--glass); backdrop-filter: blur(12px); box-shadow: var(--sh-md);
  transition: transform var(--t) var(--ease), border-color var(--t) var(--ease);
}
.contact-card:hover { transform: translateY(-3px); border-color: var(--border-strong); }
.contact-card__icon {
  width: 44px; height: 44px; border-radius: var(--radius-sm); flex: none;
  display: grid; place-items: center; font-size: 20px;
  background: color-mix(in srgb, var(--mint) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--mint) 24%, transparent);
}
.contact-card h3 { font-size: 1rem; margin-bottom: 4px; }
.contact-card p { color: var(--t3); font-size: 0.9rem; }
.contact-card .val { font-family: var(--font-mono); color: var(--mint); font-size: 0.95rem; margin-top: 6px; }

.donate-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@media (max-width: 900px) { .donate-grid { grid-template-columns: 1fr; } }
.donate-card { text-align: center; padding: 30px 24px; }
.donate-card img.qr {
  width: 180px; height: 180px; margin: 0 auto 18px; object-fit: cover;
  border-radius: var(--radius-md); border: 1px solid var(--border); background: #fff;
}
.donate-card h3 { font-size: 1.0625rem; margin-bottom: 6px; }
.donate-card p { color: var(--t3); font-size: 0.9rem; }
.donate-card .wechat-box__id { margin: 12px 0 14px; }

/* 同一产品的多语言/多渠道版本 */
.edition {
  display: flex; align-items: center; gap: 14px;
  padding: 14px 0; border-top: 1px solid var(--border-soft);
}
.edition:first-of-type { border-top: 0; padding-top: 0; }
.edition:last-of-type { padding-bottom: 0; }
.edition img {
  width: 46px; height: 46px; border-radius: 13px; flex: none;
  border: 1px solid var(--border);
}
.edition .meta { flex: 1 1 auto; min-width: 0; }
.edition .meta b { display: block; font-family: var(--font-display); font-size: 1rem; }
.edition .meta span { display: block; font-size: 0.8125rem; color: var(--t4); }

/* ---------- 20. 提示条 ---------- */
.banner {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  padding: 12px 18px; border-radius: var(--radius-md);
  border: 1px solid var(--border); background: var(--glass-soft);
  font-size: 0.875rem; color: var(--t2);
}
.banner--gold { border-color: color-mix(in srgb, var(--gold) 32%, transparent); background: color-mix(in srgb, var(--gold) 8%, transparent); }
.banner b { font-family: var(--font-display); }

/* ---------- 21. 列表条目 ---------- */
.entry { display: grid; grid-template-columns: 96px minmax(0, 1fr); gap: 20px; padding: 18px 0; border-top: 1px solid var(--border-soft); }
.entry:first-child { border-top: 0; }
.entry__date { font-family: var(--font-mono); font-size: 0.8125rem; color: var(--t4); padding-top: 3px; }
.entry h3 { font-size: 1rem; margin-bottom: 6px; }
.entry ul { margin: 0; padding-left: 1.1rem; display: grid; gap: 5px; color: var(--t3); font-size: 0.9rem; }
.entry ul li::marker { color: var(--t4); }
@media (max-width: 620px) { .entry { grid-template-columns: 1fr; gap: 8px; } }

.checklist { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.checklist li { display: flex; gap: 10px; align-items: flex-start; font-size: 0.9375rem; color: var(--t2); }
.checklist svg { width: 16px; height: 16px; flex: none; margin-top: 5px; fill: none; stroke: var(--mint); stroke-width: 2.5; stroke-linecap: round; stroke-linejoin: round; }

/* ---------- 22. 杂项 ---------- */
.skip-link { position: absolute; left: -9999px; }
.skip-link:focus { left: 16px; top: 12px; z-index: 99; padding: 8px 16px; background: var(--surface-2); border-radius: var(--radius-sm); border: 1px solid var(--border); }
.toast {
  position: fixed; left: 50%; bottom: 32px; transform: translate(-50%, 12px);
  padding: 12px 22px; border-radius: var(--radius-pill);
  background: var(--surface-2); border: 1px solid var(--border); color: var(--t1);
  box-shadow: var(--sh-xl); font-size: 0.9rem; opacity: 0; pointer-events: none;
  transition: opacity var(--t) var(--ease), transform var(--t) var(--ease); z-index: 200;
}
.toast.is-on { opacity: 1; transform: translate(-50%, 0); }

/* ==========================================================================
   23. 产品行（主页产品目录）
   ========================================================================== */
.proj {
  display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: 56px; align-items: center;
  padding: 64px 0; border-top: 1px solid var(--border-soft);
}
.proj:first-of-type { padding-top: 0; border-top: 0; }
.proj__shots { order: 1; min-width: 0; }
.proj__body { order: 2; min-width: 0; }
.proj--flip .proj__body { order: 1; }
.proj--flip .proj__shots { order: 2; }

.proj__title { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; flex-wrap: wrap; }
.proj__title h3 { font-size: 1.75rem; }
.proj__meta { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }
.proj__lede { color: var(--t3); font-size: 1.0625rem; margin-bottom: 22px; }
.proj__list { list-style: none; margin: 0 0 26px; padding: 0; display: grid; gap: 11px; }
.proj__list li { display: flex; gap: 11px; align-items: flex-start; font-size: 0.9375rem; color: var(--t2); }
.proj__list svg { width: 17px; height: 17px; flex: none; margin-top: 5px; fill: none; stroke-width: 2.5; stroke-linecap: round; stroke-linejoin: round; }
.proj--jiyi .proj__list svg { stroke: var(--mint); }
.proj--quantlab .proj__list svg { stroke: #818cf8; }
.proj__actions { display: flex; gap: 10px; flex-wrap: wrap; }

@media (max-width: 1000px) {
  .proj { grid-template-columns: 1fr; gap: 32px; padding: 48px 0; }
  .proj__shots, .proj__body, .proj--flip .proj__shots, .proj--flip .proj__body { order: 0; }
  .proj__title h3 { font-size: 1.45rem; }
}

/* 手机三连 */
.shots-phones { display: flex; gap: 14px; justify-content: center; }
.shots-phones .phone { width: 30%; max-width: 168px; border-radius: 22px; padding: 6px; }
.shots-phones .phone img { border-radius: 17px; }
@media (max-width: 1000px) { .shots-phones .phone { width: 31%; } }

/* 窗口截图 */
.shots-window { display: grid; gap: 14px; }
.shots-window__pair { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.win {
  border: 1px solid var(--border); border-radius: var(--radius-md); overflow: hidden;
  background: var(--surface-2); box-shadow: var(--sh-lg);
}
.win img { width: 100%; display: block; }
.win--lg { border-radius: var(--radius-lg); box-shadow: var(--sh-xl); }

/* 更多产品占位 */
.more-card {
  display: flex; align-items: center; gap: 20px; flex-wrap: wrap;
  padding: 28px 32px; border: 1px dashed var(--border-strong);
  border-radius: var(--radius-xl); background: var(--glass-soft);
}
.more-card b { font-family: var(--font-display); font-size: 1.1rem; }
.more-card p { color: var(--t3); font-size: 0.9375rem; flex: 1 1 320px; }

/* ==========================================================================
   24. 界面画廊（产品详情页）
   ========================================================================== */
.gallery { display: grid; gap: 22px; }
.gallery--3 { grid-template-columns: repeat(3, 1fr); }
.gallery--2 { grid-template-columns: repeat(2, 1fr); }
.gallery__item { text-align: center; }
.gallery__item .frame {
  border: 1px solid var(--border); border-radius: var(--radius-md); overflow: hidden;
  background: var(--surface-2); box-shadow: var(--sh-lg);
  transition: transform var(--t) var(--ease), border-color var(--t) var(--ease);
}
.gallery__item:hover .frame { transform: translateY(-4px); border-color: var(--border-strong); }
.gallery__item img { width: 100%; display: block; }
.gallery__item figcaption { margin-top: 12px; font-size: 0.8125rem; color: var(--t4); }
.gallery__item figcaption b { display: block; font-family: var(--font-display); font-size: 0.9375rem; color: var(--t2); margin-bottom: 3px; }

@media (max-width: 900px) { .gallery--3 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .gallery--3, .gallery--2 { grid-template-columns: 1fr; } }

/* ==========================================================================
   25. 页内二级导航（产品详情页）
   ========================================================================== */
.subnav {
  position: sticky; top: var(--nav-h); z-index: 40;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-soft);
}
.subnav__inner { display: flex; gap: 4px; overflow-x: auto; padding: 8px 0; }
.subnav a {
  padding: 7px 15px; border-radius: var(--radius-pill); white-space: nowrap;
  font-size: 0.875rem; color: var(--t3); border: 1px solid transparent;
  transition: all var(--t-fast) var(--ease);
}
.subnav a:hover { color: var(--t1); background: var(--glass-soft); }
.subnav a.is-on { color: var(--t1); border-color: var(--border); background: var(--glass-soft); }

/* ==========================================================================
   26. 表单生成结果（无后端：生成文本 → 复制 → 粘贴到微信）
   ========================================================================== */
.compose-out {
  margin-top: 20px; padding: 20px;
  border: 1px solid color-mix(in srgb, var(--mint) 34%, transparent);
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--mint) 8%, transparent);
}
.compose-out__hint { font-size: 0.9rem; color: var(--t2); margin-bottom: 12px; }
.compose-out__hint b { color: var(--mint); }
.compose-out textarea {
  width: 100%; min-height: 150px; resize: vertical;
  font-family: var(--font-mono); font-size: 0.8125rem; line-height: 1.75;
  padding: 14px; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: color-mix(in srgb, var(--bg) 60%, transparent);
  color: var(--t2);
}
.compose-out textarea:focus { outline: none; border-color: var(--mint); }
.compose-out__actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 14px; align-items: center; }

/* 微信联系方式展示 */
.wechat-box {
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  padding: 18px 20px; border-radius: var(--radius-md);
  border: 1px solid color-mix(in srgb, var(--mint) 32%, transparent);
  background: color-mix(in srgb, var(--mint) 8%, transparent);
}
.wechat-box__id {
  font-family: var(--font-mono); font-size: 1.25rem; font-weight: 600;
  color: var(--mint); letter-spacing: 0.02em;
}