/* 巴雷特工作室 Barrett Studio — 官网样式
   设计语言：新粗野主义（Neo-brutalism）
     · 2.5px 纯黑描边 + 无模糊硬阴影（直角，不用圆角过渡）
     · 主色沿用产品主题：克莱因蓝 #2563eb（hue 221）
     · 荧光黄绿 #d8ff3e 作强调色，只用于小面积（标签 / 分隔 / 高亮块）
     · 三个板块在同一冷色系里拉色相区分：预测 221° / DEX 192° / CEX 243°
   字体：系统字体栈（不引外部字体，避免国内访问 Google Fonts 拖慢首屏） */

:root {
  --bg: #eef1f8;
  --panel: #ffffff;
  --panel-2: #f3f6fc;

  --ink: #0a0a0a;
  --line: #0a0a0a;
  --line-2: #0a0a0a;

  --txt: #0a0a0a;
  --txt-2: #3f4757;
  --txt-dim: #6b7488;

  --brand: #2563eb;
  --brand-ink: #1d4ed8;
  --brand-soft: rgba(37, 99, 235, 0.1);
  --brand-line: rgba(37, 99, 235, 0.35);

  --accent: #d8ff3e;

  --predict: #2563eb;
  --predict-ink: #1d4ed8;
  --predict-soft: rgba(37, 99, 235, 0.08);

  --dex: #0891b2;
  --dex-ink: #0e7490;
  --dex-soft: rgba(8, 145, 178, 0.08);

  --cex: #4f46e5;
  --cex-ink: #4338ca;
  --cex-soft: rgba(79, 70, 229, 0.08);

  --brd: 2.5px solid var(--ink);
  --brd-thin: 2px solid var(--ink);
  --shadow: 6px 6px 0 var(--ink);
  --shadow-sm: 4px 4px 0 var(--ink);
  --shadow-xs: 3px 3px 0 var(--ink);

  --radius: 0;
  --radius-lg: 0;
  --wrap: 1200px;

  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, 'Liberation Mono', monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--txt);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB',
    'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  font-size: 15.5px;
  line-height: 1.68;
  -webkit-font-smoothing: antialiased;
  /* clip 而不是 hidden：不创建滚动容器，吸顶导航不受影响 */
  overflow-x: clip;
  overflow-wrap: break-word;
}

h1, h2, h3, h4, h5 {
  margin: 0;
  line-height: 1.14;
  font-weight: 800;
  letter-spacing: -0.02em;
}
p { margin: 0 0 12px; }
p:last-child { margin-bottom: 0; }
a { color: var(--brand); text-decoration: none; }
a:hover { color: var(--brand-ink); }
b { font-weight: 700; }
code {
  font-family: var(--mono);
  font-size: 0.87em;
  background: var(--panel-2);
  border: 1.5px solid var(--ink);
  padding: 0 5px;
  overflow-wrap: anywhere;
}

/* grid / flex 子项默认 min-width:auto，会让内部的横向滚动容器反而撑破整页 */
.grid-2 > *, .grid-3 > *, .split > *, .guide-grid > *,
.strat-grid > *, .term-grid > *, .plan-grid > * { min-width: 0; }

[id] { scroll-margin-top: 96px; }

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

/* ---------- 顶部滚动条带 ---------- */
.ticker {
  background: var(--ink);
  color: var(--accent);
  overflow: hidden;
}
.ticker-track {
  display: flex;
  width: max-content;
  animation: tick 36s linear infinite;
}
.ticker-track span {
  padding: 9px 0 9px 18px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  white-space: nowrap;
}
.ticker-track span::after { content: '•'; margin-left: 18px; }
@keyframes tick {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ---------- 导航 ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--panel);
  border-bottom: var(--brd);
  transition: box-shadow 0.15s ease;
}
.nav.is-stuck { box-shadow: 0 8px 0 rgba(10, 10, 10, 0.08); }
.nav-inner { display: flex; align-items: center; gap: 24px; height: 72px; }

.brand { display: flex; align-items: center; gap: 11px; color: var(--txt); flex-shrink: 0; }
.brand:hover { color: var(--txt); }
.brand-mark {
  width: 36px; height: 36px; flex-shrink: 0;
  display: block; object-fit: cover;
  background: var(--ink); /* logo 是黑底图：没加载出来时是黑块，不会塌成空洞 */
  border: var(--brd-thin); box-shadow: var(--shadow-xs);
}
/* logo 本身是黑底，落在黑页脚上会糊在一起：换白描边 + 白硬阴影拉开 */
.footer .brand-mark {
  border-color: #fff;
  box-shadow: 3px 3px 0 rgba(255, 255, 255, 0.42);
}
.brand-text {
  display: block; line-height: 1.06;
  font-weight: 900; font-size: 17px; letter-spacing: 0.04em;
}
.brand-text > span { color: var(--brand); }
.brand-text em {
  display: block;
  font-style: normal; font-size: 10.5px; font-weight: 600;
  color: var(--txt-dim); letter-spacing: 0.02em; margin-top: 4px;
}

.nav-links { display: flex; gap: 4px; margin-left: auto; flex-wrap: wrap; }
.nav-links a {
  padding: 7px 11px;
  font-size: 13.5px; font-weight: 700; color: var(--txt-2);
  border: 2px solid transparent;
  transition: background 0.12s ease, color 0.12s ease, border-color 0.12s ease;
}
.nav-links a:hover { color: var(--ink); background: var(--accent); border-color: var(--ink); }

.nav-actions { display: flex; align-items: center; gap: 12px; }

.menu-toggle {
  display: none;
  width: 42px; height: 42px;
  border: var(--brd-thin); background: var(--panel);
  box-shadow: var(--shadow-xs); cursor: pointer;
  padding: 0; flex-direction: column; align-items: center; justify-content: center; gap: 4px;
}
.menu-toggle span { display: block; width: 17px; height: 2.5px; background: var(--ink); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 44px; padding: 0 20px;
  border: var(--brd-thin); background: var(--panel); color: var(--ink);
  font-size: 14.5px; font-weight: 800; letter-spacing: 0.01em;
  cursor: pointer; white-space: nowrap;
  box-shadow: var(--shadow-xs);
  transition: transform 0.12s ease, box-shadow 0.12s ease, background 0.12s ease;
}
.btn:hover { transform: translate(-2px, -2px); box-shadow: 6px 6px 0 var(--ink); color: var(--ink); }
.btn:active { transform: translate(1px, 1px); box-shadow: 1px 1px 0 var(--ink); }
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { color: #fff; background: var(--brand-ink); }
.btn-ghost { background: var(--accent); color: var(--ink); }
.btn-lg { height: 52px; padding: 0 26px; font-size: 15.5px; }
.arw { font-weight: 900; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 68px 0 76px;
  background: var(--panel);
  border-bottom: var(--brd);
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(10, 10, 10, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10, 10, 10, 0.05) 1px, transparent 1px);
  background-size: 30px 30px;
  pointer-events: none;
}
.hero-grid {
  position: relative;
  display: grid; grid-template-columns: 1.05fr 0.95fr;
  gap: 52px; align-items: center;
}
.hero-copy { text-align: left; }

.eyebrow {
  display: inline-block;
  background: var(--accent); color: var(--ink);
  border: var(--brd-thin); box-shadow: var(--shadow-xs);
  font-size: 11.5px; font-weight: 800;
  letter-spacing: 0.1em; text-transform: uppercase;
  padding: 6px 13px; margin-bottom: 24px;
}
.hero h1 {
  font-size: clamp(38px, 5.4vw, 70px);
  font-weight: 900; line-height: 0.99; letter-spacing: -0.035em;
}
.hero h1 .hl {
  display: inline-block;
  background: var(--brand); color: #fff;
  border: var(--brd-thin); box-shadow: var(--shadow-xs);
  padding: 0 12px;
}
.only-mobile { display: none; }

.lede { max-width: 580px; margin: 24px 0 0; font-size: 16.5px; color: var(--txt-2); }
.hero-cta { display: flex; gap: 14px; margin-top: 30px; flex-wrap: wrap; }
.hero-note { margin-top: 24px; font-size: 13px; color: var(--txt-dim); }

.hero-visual { display: grid; gap: 16px; }

/* 窗口卡（示意图风格） */
.win { border: var(--brd); background: var(--panel); box-shadow: 8px 8px 0 var(--ink); }
.win-bar {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 14px;
  border-bottom: var(--brd); background: var(--panel-2);
}
.win-bar b {
  font-family: var(--mono);
  font-size: 11px; font-weight: 800; letter-spacing: 0.14em; text-transform: uppercase;
}
.win-ico { margin-left: auto; font-weight: 900; font-size: 15px; }
.dots { display: flex; gap: 5px; }
.dots i { width: 11px; height: 11px; border: 2px solid var(--ink); border-radius: 50%; display: block; }
.dots i:nth-child(1) { background: var(--accent); }
.dots i:nth-child(2) { background: var(--brand); }
.dots i:nth-child(3) { background: var(--panel); }

.win-body { padding: 16px; }

.stats {
  list-style: none; margin: 0 0 14px; padding: 0;
  display: grid; grid-template-columns: 1fr 1fr; gap: 10px;
}
.stats li { border: var(--brd-thin); background: var(--panel); padding: 12px 14px; }
.stats b { display: block; font-family: var(--mono); font-size: 26px; font-weight: 900; line-height: 1.15; }
.stats span { font-size: 12px; font-weight: 600; color: var(--txt-dim); }

.win-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.win-tags span {
  font-size: 11.5px; font-weight: 800;
  border: 2px solid var(--ink); padding: 4px 10px;
  background: var(--accent);
}
.win-tags span:nth-child(2) { background: var(--brand); color: #fff; }
.win-tags span:nth-child(3) { background: var(--panel); }

.chain-strip {
  border: var(--brd); background: var(--ink); color: #fff;
  padding: 13px 15px; box-shadow: var(--shadow-sm);
  display: grid; gap: 7px;
}
.cs-label {
  font-size: 10.5px; font-weight: 800;
  letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent);
}
.cs-list { font-family: var(--mono); font-size: 11.5px; line-height: 1.75; color: rgba(255, 255, 255, 0.85); }

/* ---------- 区块 ---------- */
main { counter-reset: sec; }

.section { padding: 84px 0; border-top: var(--brd); }
.section-alt { background: var(--panel); }

.section > .wrap > h2 {
  counter-increment: sec;
  font-size: clamp(26px, 3.5vw, 42px);
  font-weight: 900; line-height: 1.06; letter-spacing: -0.03em;
}
.section > .wrap > h2::before {
  content: '0' counter(sec);
  display: block;
  font-family: var(--mono);
  font-size: 12px; font-weight: 800; letter-spacing: 0.18em;
  color: var(--brand); margin-bottom: 12px;
}
.section > .wrap > h2::after {
  content: '';
  display: block; width: 72px; height: 8px;
  background: var(--accent); border: var(--brd-thin);
  margin-top: 16px;
}
.section-lede { max-width: 860px; margin: 16px 0 42px; font-size: 16px; color: var(--txt-2); }

.sub { font-size: 19px; font-weight: 800; margin: 42px 0 16px; }
.sub-inline { font-size: 14.5px; font-weight: 800; margin: 20px 0 8px; }
.note { font-size: 13.5px; color: var(--txt-dim); }

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.split { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; margin-top: 22px; }

/* ---------- 卡片 ---------- */
.card {
  background: var(--panel); border: var(--brd);
  padding: 24px; box-shadow: var(--shadow);
}
.card h3 { font-size: 18px; margin-bottom: 10px; }
.card p { color: var(--txt-2); font-size: 14.5px; }
.card-flat { background: var(--panel-2); box-shadow: var(--shadow-sm); }
.card.cat-dex { --cat: var(--dex); }
.card.cat-cex { --cat: var(--cex); }
.card.cat-dex h3, .card.cat-cex h3 { margin-bottom: 14px; }

/* 三板块卡片 */
.mod-card {
  position: relative;
  background: var(--panel); border: var(--brd);
  padding: 30px 24px 24px; box-shadow: var(--shadow);
}
.mod-card::before {
  content: '';
  position: absolute; left: -2.5px; right: -2.5px; top: -2.5px; height: 9px;
  background: var(--cat, var(--brand));
  border: var(--brd-thin); border-bottom: 0;
}
.mod-card.cat-predict { --cat: var(--predict); }
.mod-card.cat-dex { --cat: var(--dex); }
.mod-card.cat-cex { --cat: var(--cex); }

.mod-tag {
  display: inline-block;
  font-size: 11px; font-weight: 800; letter-spacing: 0.12em; text-transform: uppercase;
  color: #fff; background: var(--cat, var(--brand));
  border: 2px solid var(--ink); padding: 4px 10px; margin-bottom: 16px;
}
.mod-card h3 { font-size: 21px; font-weight: 900; margin-bottom: 10px; }
.mod-card > p { color: var(--txt-2); font-size: 14.5px; min-height: 52px; }
.mod-list { list-style: none; margin: 0 0 20px; padding: 0; }
.mod-list li {
  position: relative;
  font-size: 14px; color: var(--txt-2);
  padding: 8px 0 8px 22px;
  border-top: 1.5px dashed rgba(10, 10, 10, 0.25);
}
.mod-list li:first-child { border-top: 0; }
.mod-list li::before {
  content: '';
  position: absolute; left: 0; top: 15px;
  width: 9px; height: 9px;
  background: var(--cat, var(--brand)); border: 2px solid var(--ink);
}
.mod-link { font-size: 14px; font-weight: 800; color: var(--cat, var(--brand)); }

.check { list-style: none; margin: 0 0 4px; padding: 0; }
.check li {
  position: relative;
  font-size: 14.5px; color: var(--txt-2);
  padding: 7px 0 7px 24px;
}
.check li::before {
  content: '✓';
  position: absolute; left: 0; top: 7px;
  color: var(--cat, var(--brand)); font-weight: 900; font-size: 13.5px;
}

/* ---------- 五层融合 ---------- */
.layer-flow { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; margin-bottom: 30px; }
.layer {
  background: var(--panel); border: var(--brd-thin);
  box-shadow: var(--shadow-xs);
  padding: 15px 12px; text-align: center;
}
.layer b {
  display: block; font-family: var(--mono);
  font-size: 12px; font-weight: 800; letter-spacing: 0.08em;
  color: var(--brand-ink); margin-bottom: 4px;
}
.layer span { font-size: 13.5px; color: var(--txt-2); }
.layer-opt { border-style: dashed; background: var(--panel-2); box-shadow: none; }
.layer-opt b { color: var(--txt-dim); }

/* ---------- 链 ---------- */
.tabs { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 24px; }
.tab {
  border: var(--brd-thin); background: var(--panel);
  padding: 9px 18px;
  font-family: inherit; font-size: 14px; font-weight: 800; color: var(--txt-2);
  cursor: pointer; box-shadow: var(--shadow-xs);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}
.tab:hover { transform: translate(-2px, -2px); box-shadow: 5px 5px 0 var(--ink); color: var(--ink); }
.tab.is-on { background: var(--brand); border-color: var(--ink); color: #fff; }

.chain-box { background: var(--panel); border: var(--brd); padding: 22px; box-shadow: var(--shadow); }
.chain-list { list-style: none; margin: 0; padding: 0; display: none; flex-wrap: wrap; gap: 9px; }
.chain-list.is-on { display: flex; }
.chain-list li {
  background: var(--panel-2); border: 2px solid var(--ink);
  padding: 5px 12px; font-size: 13px; color: var(--txt-2); font-weight: 600;
}

.table-wrap {
  overflow-x: auto; border: var(--brd); background: var(--panel);
  box-shadow: var(--shadow-sm);
  -webkit-overflow-scrolling: touch;
  overscroll-behavior-x: contain;
}
table { width: 100%; border-collapse: collapse; min-width: 540px; }
th, td { text-align: left; padding: 12px 16px; font-size: 14px; border-bottom: 1.5px solid rgba(10, 10, 10, 0.14); }
th {
  background: var(--panel-2); font-weight: 800; color: var(--ink);
  white-space: nowrap; border-bottom: var(--brd-thin);
}
td { color: var(--txt-2); }
tbody tr:last-child td { border-bottom: 0; }

/* ---------- 套餐 ---------- */
.plan {
  position: relative;
  background: var(--panel); border: var(--brd);
  overflow: hidden; box-shadow: var(--shadow);
}
.plan::before { content: ''; position: absolute; inset: 0 0 auto 0; height: 9px; background: var(--cat); border-bottom: var(--brd-thin); }
.plan.cat-predict { --cat: var(--predict); }
.plan.cat-dex { --cat: var(--dex); }
.plan.cat-cex { --cat: var(--cex); }
.plan header { padding: 30px 24px 18px; background: var(--cat-soft, var(--brand-soft)); border-bottom: 1.5px dashed rgba(10, 10, 10, 0.25); }
.plan.cat-predict header { background: var(--predict-soft); }
.plan.cat-dex header { background: var(--dex-soft); }
.plan.cat-cex header { background: var(--cex-soft); }
.plan h3 { font-size: 20px; font-weight: 900; color: var(--cat); margin-bottom: 5px; }
.plan header p { font-size: 13.5px; color: var(--txt-2); margin: 0; }
.plan-tiers { list-style: none; margin: 0; padding: 10px 24px 24px; }
.plan-tiers li {
  display: flex; align-items: baseline; gap: 10px;
  padding: 12px 0; border-bottom: 1.5px dashed rgba(10, 10, 10, 0.25);
}
.plan-tiers li:last-child { border-bottom: 0; }
.plan-tiers span { font-size: 13px; color: var(--txt-dim); width: 34px; flex-shrink: 0; }
.plan-tiers b { font-family: var(--mono); font-size: 16px; font-weight: 900; color: var(--txt); margin-left: auto; }
.plan-tiers em { font-style: normal; font-size: 12px; color: var(--txt-dim); }

.plan-grid { align-items: stretch; }
.plan-grid > .plan { display: flex; flex-direction: column; }
.plan-grid > .plan .plan-tiers { margin-top: auto; }

.pay-facts { margin-top: 30px; gap: 18px; }
.fact { background: var(--panel); border: var(--brd-thin); padding: 20px; box-shadow: var(--shadow-xs); }
.fact h4 { font-size: 15px; font-weight: 800; margin-bottom: 8px; }
.fact p { font-size: 13.5px; color: var(--txt-2); }

/* ---------- 使用指南 ---------- */
.guide-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.guide-card { background: var(--panel); border: var(--brd); padding: 24px; box-shadow: var(--shadow); }
.guide-card > header {
  display: flex; align-items: center; gap: 13px;
  padding-bottom: 15px; margin-bottom: 6px;
  border-bottom: 1.5px dashed rgba(10, 10, 10, 0.25);
}
.step-badge {
  width: 38px; height: 38px; flex-shrink: 0;
  display: grid; place-items: center;
  background: var(--brand); color: #fff;
  border: var(--brd-thin); box-shadow: var(--shadow-xs);
  font-family: var(--mono); font-weight: 900; font-size: 14px;
}
.guide-card h3 { font-size: 18px; font-weight: 900; }

.steps { list-style: none; margin: 0; padding: 0; counter-reset: step; }
.steps li {
  counter-increment: step;
  position: relative;
  padding: 11px 0 11px 34px;
  font-size: 14.5px; color: var(--txt-2);
  border-top: 1.5px dashed rgba(10, 10, 10, 0.25);
}
.steps li:first-child { border-top: 0; }
.steps li::before {
  content: counter(step);
  position: absolute; left: 0; top: 13px;
  width: 22px; height: 22px;
  background: var(--accent); border: 2px solid var(--ink);
  font-family: var(--mono); font-size: 11.5px; font-weight: 900; line-height: 19px;
  text-align: center; color: var(--ink);
}
.steps li b { color: var(--txt); }

.guide-tip {
  margin-top: 24px; padding: 20px 22px;
  background: var(--accent); border: var(--brd);
  box-shadow: var(--shadow-sm);
  font-size: 14.5px; color: var(--txt);
}
.guide-tip b { color: var(--ink); }

/* ---------- 知识库 ---------- */
.ref-nav { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 28px; }
.ref-nav a {
  padding: 7px 15px;
  background: var(--panel); border: 2px solid var(--ink);
  font-size: 13.5px; font-weight: 700; color: var(--txt-2);
  box-shadow: var(--shadow-xs);
  transition: transform 0.12s ease, box-shadow 0.12s ease, background 0.12s ease;
}
.ref-nav a:hover {
  transform: translate(-2px, -2px); box-shadow: 5px 5px 0 var(--ink);
  background: var(--accent); color: var(--ink);
}

.ref-h {
  font-size: 23px; font-weight: 900; letter-spacing: -0.02em;
  margin: 42px 0 12px;
  padding-left: 16px; border-left: 8px solid var(--brand);
}
.ref-sub { margin: 26px 0 12px; font-size: 15.5px; font-weight: 800; color: var(--txt-2); }
.ref-p { font-size: 14.5px; color: var(--txt-2); margin-bottom: 16px; }

.ref-scroll {
  overflow-x: auto; margin-bottom: 10px;
  border: var(--brd); background: var(--panel);
  box-shadow: var(--shadow-sm);
  -webkit-overflow-scrolling: touch;
  overscroll-behavior-x: contain;
}
.ref-table { width: 100%; min-width: 620px; border-collapse: collapse; font-size: 13.5px; }
.ref-table th, .ref-table td { padding: 9px 13px; text-align: left; border-bottom: 1.5px solid rgba(10, 10, 10, 0.14); }
.ref-table thead th {
  background: var(--panel-2); color: var(--ink);
  font-weight: 800; font-size: 12.5px; white-space: nowrap;
  border-bottom: var(--brd-thin);
}
.ref-table tbody tr:last-child td { border-bottom: 0; }
.ref-table tbody tr:hover { background: rgba(37, 99, 235, 0.06); }
.ref-table td.y { color: #15803d; font-weight: 900; text-align: center; }
.ref-table td.n { color: #9aa3b2; text-align: center; }
.ref-table th:is(:nth-child(5), :nth-child(6), :nth-child(7)) { text-align: center; }

/* 界面示意图 */
.mock { border: var(--brd); background: var(--panel); box-shadow: var(--shadow); min-width: 0; }
.mock-head {
  display: flex; align-items: center; gap: 9px; flex-wrap: wrap;
  padding: 12px 14px;
  border-bottom: var(--brd-thin); background: var(--panel-2);
}
.mock-chip {
  padding: 4px 10px; border: 2px solid var(--ink);
  font-size: 12.5px; font-weight: 700; background: var(--panel);
}
.mock-pill {
  padding: 3px 9px; border: 2px solid var(--ink);
  font-size: 11.5px; font-weight: 700;
  background: var(--accent); color: var(--ink);
}
.mock-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 12px; border: 2px solid var(--ink);
  font-size: 12.5px; font-weight: 700;
}
.mock-btn.ghost { background: var(--panel); color: var(--txt-2); }
.mock-btn.primary { background: var(--brand); color: #fff; }
.mock-tabs {
  display: flex; gap: 3px; padding: 8px 10px; overflow-x: auto;
  border-bottom: var(--brd-thin); font-size: 12.5px; color: var(--txt-2);
}
.mock-tabs span { padding: 5px 9px; white-space: nowrap; border: 2px solid transparent; }
.mock-tabs span.on { background: var(--accent); border-color: var(--ink); color: var(--ink); font-weight: 800; }
.mock-body { padding: 14px; display: grid; gap: 11px; }
.mock-row { display: grid; gap: 6px; }
.mock-row.two { grid-template-columns: 1fr 1fr; gap: 12px; }
.mock-row label { display: flex; align-items: center; gap: 7px; font-size: 12.5px; color: var(--txt-2); font-weight: 700; }
.mock-input {
  padding: 9px 11px; border: 2px solid var(--ink);
  font-size: 13px; background: var(--panel); color: var(--txt);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.mock-input.dim { color: #9aa3b2; }
.mock-note {
  font-size: 11.5px; color: var(--txt-dim);
  background: var(--panel-2); border: 1.5px dashed var(--ink);
  padding: 8px 10px;
}
.mock-note.soft { border-style: solid; }
.mock-actions { display: flex; gap: 11px; flex-wrap: wrap; margin-top: 2px; }

.num {
  display: inline-grid; place-items: center;
  width: 19px; height: 19px; flex-shrink: 0;
  background: var(--brand); color: #fff;
  border: 2px solid var(--ink);
  font-family: var(--mono); font-size: 11px; font-weight: 900; font-style: normal;
}

.ctrl-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; align-content: start; }
.ctrl-list li { display: flex; gap: 11px; font-size: 13.5px; color: var(--txt-2); }
.ctrl-list li b { color: var(--txt); }

/* 策略卡 */
.strat-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.strat { background: var(--panel); border: var(--brd); padding: 20px 22px; box-shadow: var(--shadow-sm); }
.strat.warn { background: #fffbe8; }
.strat.warn::before {
  content: '高风险';
  display: inline-block;
  font-size: 10.5px; font-weight: 900; letter-spacing: 0.1em;
  background: #f59e0b; color: var(--ink);
  border: 2px solid var(--ink); padding: 2px 7px; margin-bottom: 8px;
}
.strat h5 { font-size: 15.5px; font-weight: 900; margin-bottom: 7px; }
.strat h5 code { font-size: 11.5px; }
.strat > p { font-size: 13.5px; color: var(--txt-2); margin-bottom: 13px; }
.strat dl { display: grid; grid-template-columns: auto 1fr; gap: 7px 14px; margin: 0; font-size: 13px; }
.strat dt { color: var(--txt-dim); }
.strat dd { margin: 0; color: var(--txt); font-weight: 600; }

/* 术语卡 */
.term-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.term { background: var(--panel); border: var(--brd-thin); padding: 17px 19px; box-shadow: var(--shadow-xs); }
.term h5 { font-size: 15px; font-weight: 900; margin-bottom: 7px; }
.term p { font-size: 13.5px; color: var(--txt-2); margin: 0; }

/* ---------- FAQ ---------- */
.faq { max-width: 900px; }
details {
  background: var(--panel); border: var(--brd);
  margin-bottom: 12px; box-shadow: var(--shadow-xs);
}
summary {
  cursor: pointer; padding: 17px 20px;
  font-weight: 800; font-size: 15.5px;
  display: flex; justify-content: space-between; align-items: center; gap: 14px;
  list-style: none;
}
summary::-webkit-details-marker { display: none; }
summary::after { content: '+'; color: var(--brand); font-size: 21px; font-weight: 900; line-height: 1; }
details[open] summary { background: var(--accent); border-bottom: var(--brd-thin); }
details[open] summary::after { content: '−'; color: var(--ink); }
details p { padding: 0 20px 18px; margin: 0; color: var(--txt-2); font-size: 14.5px; }

/* ---------- 底部 CTA ---------- */
.cta-band {
  padding: 76px 0;
  background: var(--brand);
  border-top: var(--brd);
}
.cta-inner { text-align: center; }
.cta-inner h2 { font-size: clamp(28px, 4vw, 46px); font-weight: 900; color: #fff; letter-spacing: -0.03em; }
.cta-inner p { color: rgba(255, 255, 255, 0.9); margin-top: 14px; font-size: 16px; }
.cta-band .hero-cta { justify-content: center; }
.cta-band .btn-primary { background: var(--accent); color: var(--ink); }
.cta-band .btn-primary:hover { background: var(--accent); color: var(--ink); }
.cta-band .btn-ghost { background: transparent; color: #fff; border-color: #fff; }
.cta-band .btn-ghost:hover { background: #fff; color: var(--ink); }

/* ---------- 页脚 ---------- */
.footer { background: var(--ink); color: #fff; border-top: var(--brd); }
.footer-grid {
  display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 36px;
  padding-top: 44px; padding-bottom: 32px;
}
.footer .brand-text { color: #fff; }
.footer .brand-text > span { color: var(--accent); }
.footer .brand-text em { color: rgba(255, 255, 255, 0.55); }
.footer-brand p { margin-top: 18px; font-size: 13.5px; line-height: 1.85; color: rgba(255, 255, 255, 0.65); }
.footer-col { display: grid; gap: 11px; align-content: start; }
.footer-col h4 {
  font-size: 11px; font-weight: 900; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 5px;
}
.footer-col a { font-size: 14px; color: rgba(255, 255, 255, 0.8); }
.footer-col a:hover { color: var(--accent); }

.disclaimer { padding-top: 18px; border-top: 1.5px solid rgba(255, 255, 255, 0.2); }
.disclaimer p {
  font-size: 12.5px; color: rgba(255, 255, 255, 0.6);
  line-height: 1.72; max-width: 860px;
}
.disclaimer b { color: rgba(255, 255, 255, 0.85); }

/* 免责声明折叠：收起状态下核心风险句仍然可见。
   注意：这里用 details.disc 提高特异性，覆盖 FAQ 那套「白底卡片 + 深色字」的 details 样式，
   否则在深色页脚上会出现白底白字、以及展开时黄底。 */
details.disc {
  background: transparent; border: 0; box-shadow: none; margin: 0;
}
details.disc summary {
  display: flex; flex-wrap: wrap; align-items: baseline; justify-content: flex-start;
  gap: 6px; padding: 0; margin: 0; max-width: 860px;
  font-size: 12.5px; font-weight: 400; line-height: 1.72;
  color: rgba(255, 255, 255, 0.72);
}
details.disc summary::after { content: none; }          /* 去掉 FAQ 的 + / − */
details.disc[open] summary { background: transparent; border-bottom: 0; }
details.disc[open] summary::after { content: none; }
details.disc summary b { color: rgba(255, 255, 255, 0.95); }
details.disc > p {
  padding: 0; margin: 10px 0 2px;
  font-size: 12.5px; line-height: 1.72;
  color: rgba(255, 255, 255, 0.66);
}
.disc-more {
  display: inline-flex; align-items: center; gap: 3px;
  color: var(--accent); font-size: 11.5px; white-space: nowrap;
}
.disc-more::after { content: '▾'; font-size: 10px; transition: transform 0.18s; }
details.disc[open] .disc-more::after { transform: rotate(180deg); }
.disc-more i { font-style: normal; }
.disc-more i.off, details.disc[open] .disc-more i.on { display: none; }
details.disc[open] .disc-more i.off { display: inline; }

.footer-bottom {
  display: flex; justify-content: space-between; align-items: center;
  gap: 16px; flex-wrap: wrap;
  padding-top: 18px; padding-bottom: 28px;
  font-size: 12.5px; color: rgba(255, 255, 255, 0.5);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 980px) {
  .grid-3 { grid-template-columns: 1fr; }
  .layer-flow { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 760px) {
  .nav-links {
    display: none;
    position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; gap: 0; margin: 0;
    background: var(--panel);
    border: var(--brd); border-top: 0;
    padding: 10px;
  }
  .nav-links.is-open { display: flex; }
  .nav-links a { padding: 12px; border-bottom: 1.5px dashed rgba(10, 10, 10, 0.2); }
  .nav-links a:last-child { border-bottom: 0; }
  .menu-toggle { display: flex; }
  .grid-2, .split, .guide-grid, .strat-grid, .term-grid { grid-template-columns: 1fr; }
  .section { padding: 58px 0; }
  .hero { padding: 44px 0 54px; }
  /* 品牌跨整行，三组导航排成两列，避免四块纵向堆叠 */
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 26px 20px; padding-top: 36px; padding-bottom: 28px; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-brand p { margin-top: 14px; }
  .mod-card > p { min-height: 0; }
  .stats { grid-template-columns: 1fr 1fr; }
  .win, .plan, .guide-card, .card, .strat { box-shadow: var(--shadow-xs); }
  .ref-h { font-size: 20px; }
}

/* ---------- 小屏（手机） ---------- */
@media (max-width: 560px) {
  .wrap { padding: 0 16px; }

  /* 导航：品牌 + 按钮 + 汉堡要塞进一行 */
  .nav-inner { height: 62px; gap: 10px; }
  .brand { gap: 8px; }
  .brand-mark { width: 32px; height: 32px; }
  .brand-text { font-size: 14px; letter-spacing: 0.02em; }
  .brand-text em { font-size: 9px; margin-top: 3px; }
  .nav-actions { gap: 8px; }
  .nav-actions .btn { height: 38px; padding: 0 12px; font-size: 13px; }
  .nav-actions .btn .arw { display: none; }
  .menu-toggle { width: 38px; height: 38px; }

  /* 排版收缩 */
  .section { padding: 44px 0; }
  .section-lede { margin: 14px 0 30px; font-size: 15px; }
  .hero { padding: 34px 0 42px; }
  .hero h1 { font-size: clamp(31px, 8.6vw, 42px); }
  .hero h1 .hl { padding: 0 8px; }
  .eyebrow { font-size: 11px; padding: 5px 10px; margin-bottom: 18px; }
  .lede { font-size: 15px; margin-top: 18px; }
  .hero-cta { gap: 10px; margin-top: 22px; }
  .hero-cta .btn { flex: 1 1 auto; }
  .lede, .hero-note, .section-lede { max-width: none; }
  .sub { font-size: 17px; margin: 32px 0 12px; }
  .section > .wrap > h2::after { width: 54px; height: 6px; margin-top: 12px; }

  /* 卡片内边距收紧，换取正文宽度 */
  .card, .chain-box, .guide-card, .fact, .term, .strat { padding: 16px; }
  .mod-card { padding: 26px 16px 18px; }
  .mod-card > p { min-height: 0; }
  .plan header { padding: 26px 16px 16px; }
  .plan-tiers { padding: 8px 16px 18px; }
  .card-flat, .win-body { padding: 14px; }

  /* 数据卡 */
  .stats { gap: 8px; }
  .stats li { padding: 10px 12px; }
  .stats b { font-size: 22px; }
  .win, .mock, .plan, .guide-card, .card, .strat { box-shadow: 3px 3px 0 var(--ink); }
  .cs-list { word-break: break-word; font-size: 11px; }
  .win-tags span { font-size: 11px; padding: 3px 8px; }

  /* 控件 */
  /* 触摸目标高度补到 40px 以上 */
  .tab { padding: 11px 13px; font-size: 13px; }
  .ref-nav a { padding: 9px 12px; font-size: 13px; }
  .mock-row.two { grid-template-columns: 1fr; }
  .layer-flow { grid-template-columns: 1fr 1fr; gap: 8px; }
  .layer { padding: 12px 9px; }
  .layer span { font-size: 12.5px; }
  .btn-lg { height: 48px; padding: 0 18px; font-size: 14.5px; }
  details summary { padding: 14px 15px; font-size: 14.5px; }
  details p { padding: 0 15px 15px; font-size: 14px; }
  .guide-tip { padding: 16px 15px; font-size: 14px; }
  .cta-band { padding: 50px 0; }

  /* 46 链表：窄屏隐去「简称」「地址格式」两列，剩下的横向滑动就能看完 */
  .chain-table th:nth-child(2), .chain-table td:nth-child(2),
  .chain-table th:nth-child(4), .chain-table td:nth-child(4) { display: none; }
  .ref-table { min-width: 460px; }
  .ref-table th, .ref-table td { padding: 8px 10px; }

  .footer-grid { gap: 22px 16px; padding-top: 30px; padding-bottom: 24px; }
  .footer-col { gap: 9px; }
  .footer-col a { font-size: 13.5px; }
  .footer-bottom { padding-top: 16px; padding-bottom: 24px; gap: 8px; font-size: 12px; }
}

@media (max-width: 400px) {
  .wrap { padding: 0 12px; }
  .brand-text em { display: none; }
  .nav-actions .btn { height: 36px; padding: 0 10px; font-size: 12.5px; }
  .hero h1 { font-size: clamp(28px, 8.2vw, 36px); }
  .stats { grid-template-columns: 1fr 1fr; }
  .grid-2, .split, .guide-grid, .strat-grid, .term-grid { gap: 14px; }
  .ref-h { font-size: 18px; margin: 32px 0 10px; }
}

@media (prefers-reduced-motion: reduce) {
  .ticker-track { animation: none; }
  .btn:hover, .tab:hover, .ref-nav a:hover { transform: none; }
}