/* ─────────────────────────────────────────────────────────────
   PAYMENT PRIMER · CH.01
   支付科技 / 理性 / 精算
   ───────────────────────────────────────────────────────────── */

:root {
  --ink:        #0E2233;
  --ink-0:      #08151F;
  --ink-1:      #102435;
  --ink-2:      #16303F;
  --line:       rgba(242, 245, 247, .14);
  --line-soft:  rgba(242, 245, 247, .07);
  --line-hard:  rgba(242, 245, 247, .28);
  --text:       #E9EEF2;
  --dim:        #8FA2B2;
  --dimmer:     #7A8D9E;
  --gold:       #C8A45C;
  --gold-dim:   #8C7139;
  --gold-soft:  rgba(200, 164, 92, .14);
  --red:        #C4574A;
  --red-soft:   rgba(196, 87, 74, .12);
  --green:      #6FA98B;
  --mono: "SFMono-Regular", ui-monospace, "JetBrains Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
          "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --maxw: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background:
    radial-gradient(1100px 620px at 78% -8%, rgba(200, 164, 92, .07), transparent 62%),
    radial-gradient(900px 700px at 8% 22%, rgba(70, 120, 150, .10), transparent 65%),
    var(--ink-0);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
body::before { /* 工程网格 */
  content: "";
  position: fixed; inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(242, 245, 247, .028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(242, 245, 247, .028) 1px, transparent 1px);
  background-size: 34px 34px;
  z-index: 0;
}
body > * { position: relative; z-index: 1; }

.mono { font-family: var(--mono); letter-spacing: .04em; }
.gold { color: var(--gold); }
.w { color: var(--text); font-weight: 600; }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 28px; }

/* 顶部进度 */
.scrollbar { position: fixed; top: 0; left: 0; right: 0; height: 2px; background: var(--line-soft); z-index: 40; }
.scrollbar i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--gold), #E7CE9A); transition: width .12s linear; }

.topbar {
  position: sticky; top: 0; z-index: 30;
  backdrop-filter: blur(14px);
  background: rgba(8, 21, 31, .78);
  border-bottom: 1px solid var(--line);
}
.topbar-in { display: flex; align-items: center; justify-content: space-between; height: 54px; }
.brand { display: flex; align-items: baseline; gap: 10px; }
.mark { color: var(--gold); font-size: 14px; }
.brand-t { font-family: var(--mono); font-size: 11px; letter-spacing: .18em; color: var(--text); }
.brand-s { font-family: var(--mono); font-size: 10px; letter-spacing: .06em; color: var(--dimmer); }
.topnav { display: flex; gap: 22px; }
.topnav a {
  font-family: var(--mono); font-size: 11px; letter-spacing: .06em;
  color: var(--dim); text-decoration: none; padding: 4px 0;
  border-bottom: 1px solid transparent; transition: .2s;
}
.topnav a:hover { color: var(--gold); border-bottom-color: var(--gold-dim); }

/* ── HERO ─────────────────────────────────────────────── */
.hero { padding: 86px 0 68px; border-bottom: 1px solid var(--line); position: relative; }
.hero-in { position: relative; }
.hero-meta {
  display: flex; flex-wrap: wrap; gap: 18px;
  font-size: 10px; letter-spacing: .16em; color: var(--dimmer);
  text-transform: uppercase;
}
.hero-meta span + span::before { content: "/"; margin-right: 18px; color: var(--gold-dim); }
.hero-title {
  font-size: clamp(38px, 7vw, 68px);
  line-height: 1.08; letter-spacing: .02em;
  margin: 26px 0 18px; font-weight: 600;
}
.hero-sub { color: var(--dim); font-size: clamp(15px, 2vw, 18px); line-height: 1.85; margin: 0 0 44px; }

.hero-law { display: flex; align-items: stretch; gap: 0; max-width: 760px; border: 1px solid var(--line); background: linear-gradient(180deg, var(--ink-1), rgba(16, 36, 53, .55)); }
.law-cell { flex: 1; padding: 22px 26px; display: flex; flex-direction: column; gap: 4px; }
.law-k { font-size: 10px; letter-spacing: .18em; color: var(--dimmer); }
.law-v { font-size: 26px; font-weight: 600; letter-spacing: .04em; }
.law-n { font-size: 10px; color: var(--dimmer); letter-spacing: .02em; margin-top: 2px; }
.law-sep { width: 1px; background: var(--line); position: relative; }
.law-sep::after { content: "≠"; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); color: var(--gold); font-size: 18px; background: var(--ink-1); padding: 2px; }

.hero-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line-soft); margin-top: 40px; border: 1px solid var(--line-soft); }
.stat { background: var(--ink-0); padding: 18px 18px 16px; }
.stat b { display: block; font-family: var(--mono); font-size: 28px; font-weight: 500; color: var(--gold); letter-spacing: .02em; }
.stat b small { font-size: 12px; color: var(--gold-dim); margin-left: 3px; }
.stat span { font-size: 11px; color: var(--dimmer); letter-spacing: .04em; }

.stamp {
  position: absolute; right: 0; top: 22px;
  width: 118px; height: 118px; border-radius: 50%;
  border: 1px solid var(--gold-dim);
  display: grid; place-items: center; opacity: .55;
}
.stamp::before { content: ""; position: absolute; inset: 7px; border-radius: 50%; border: 1px dashed rgba(200, 164, 92, .35); }
.stamp-in { font-size: 9px; letter-spacing: .1em; color: var(--gold); text-align: center; line-height: 1.5; transform: rotate(-12deg); }

/* ── SECTION 通用 ─────────────────────────────────────── */
.sec { padding: 84px 0 72px; border-bottom: 1px solid var(--line-soft); }
.sec.alt { background: linear-gradient(180deg, rgba(16, 36, 53, .42), rgba(16, 36, 53, 0)); }
.sec-head { max-width: 760px; margin-bottom: 42px; }
.sec-no {
  display: inline-block; font-size: 10px; letter-spacing: .22em;
  color: var(--gold); padding-bottom: 10px;
}
.sec-head h2 { font-size: clamp(24px, 3.4vw, 34px); font-weight: 600; line-height: 1.35; margin: 0 0 14px; letter-spacing: .01em; }
.sec-lead { color: var(--dim); font-size: 15px; line-height: 1.9; margin: 0; }

.aside {
  margin: 34px 0 0; padding: 16px 20px;
  border-left: 2px solid var(--gold-dim);
  background: rgba(200, 164, 92, .045);
  color: var(--dim); font-size: 13.5px; line-height: 1.85;
}
.aside.small { font-size: 12.5px; }
.aside b { color: var(--text); }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid3 > div { padding: 14px 16px; border-left: 1px solid var(--line); background: none; }
.grid3 .mono { font-size: 9.5px; letter-spacing: .16em; color: var(--dimmer); }
.grid3 p { margin: 6px 0 0; font-size: 13px; }

/* ── 01 术语卡 ─────────────────────────────────────────── */
.term-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.term {
  border: 1px solid var(--line); background: linear-gradient(170deg, var(--ink-1), rgba(10, 25, 37, .6));
  padding: 20px 20px 18px; position: relative; transition: .25s; min-height: 178px;
  display: flex; flex-direction: column;
}
.term:hover, .term.is-hot { border-color: var(--gold-dim); transform: translateY(-2px); }
.term-top { display: flex; align-items: center; gap: 9px; }
.term-top .mono {
  width: 22px; height: 22px; display: grid; place-items: center;
  border: 1px solid var(--line); font-size: 11px; color: var(--dim);
}
.term-top h3 { margin: 0; font-size: 19px; font-weight: 600; }
.term-def { margin: 12px 0 0; font-size: 13px; color: var(--dim); line-height: 1.78; }
.term-def em { font-style: normal; color: var(--gold); }
.term-scope { margin-top: auto; padding-top: 12px; font-size: 10px; letter-spacing: .08em; color: var(--dimmer); border-top: 1px solid var(--line-soft); }
.term.is-set { border-color: rgba(200, 164, 92, .35); }
.term.is-set::after { content: "COLLECTION"; position: absolute; top: 12px; right: 14px; font-family: var(--mono); font-size: 8px; letter-spacing: .18em; color: var(--gold-dim); }

.formula-bar { margin-top: 26px; display: flex; flex-wrap: wrap; align-items: center; gap: 18px; padding: 16px 20px; border: 1px solid var(--line); background: var(--ink-1); }
.formula-bar .mono { font-size: 10px; letter-spacing: .16em; color: var(--dimmer); }
.formula-bar p { margin: 0; font-size: 14.5px; }
.arrow { color: var(--gold-dim); padding: 0 8px; }

/* ── 02 交易五要素 ─────────────────────────────────────── */
.form-toggle { display: inline-flex; border: 1px solid var(--line); margin-bottom: 22px; }
.tg { appearance: none; background: none; border: 0; padding: 8px 18px; font-family: var(--mono); font-size: 11px; letter-spacing: .08em; color: var(--dim); cursor: pointer; transition: .2s; }
.tg.is-on { background: var(--gold-soft); color: var(--gold); }

.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; }
.tx-step {
  appearance: none; text-align: left; cursor: pointer;
  border: 1px solid var(--line); background: rgba(10, 25, 37, .5);
  padding: 16px 16px 14px; color: var(--text); position: relative; transition: .22s;
  display: flex; flex-direction: column; gap: 6px;
}
.tx-step:hover { border-color: var(--line-hard); }
.tx-step.is-on { border-color: var(--gold); background: linear-gradient(180deg, rgba(200, 164, 92, .12), rgba(16, 36, 53, .5)); }
.tx-step.is-key { border-color: rgba(200, 164, 92, .3); }
.tx-step.is-key::after { content: ""; position: absolute; inset: 0; border: 1px dashed rgba(200, 164, 92, .22); pointer-events: none; }
.tx-n { font-size: 9.5px; letter-spacing: .2em; color: var(--dimmer); }
.tx-step.is-on .tx-n { color: var(--gold); }
.tx-step h3 { margin: 0; font-size: 18px; font-weight: 600; letter-spacing: .02em; }
.tx-tag { font-size: 10px; color: var(--dimmer); letter-spacing: .04em; }
.tx-step.is-on .tx-tag { color: var(--gold-dim); }

.step-detail { display: grid; grid-template-columns: 300px 1fr; gap: 0; margin-top: 12px; border: 1px solid var(--line); background: var(--ink-1); }
.sd-side { padding: 26px 26px 24px; border-right: 1px solid var(--line); }
.sd-n { font-size: 10px; letter-spacing: .2em; color: var(--gold-dim); }
.sd-side h4 { margin: 8px 0 10px; font-size: 24px; font-weight: 600; }
.sd-role { margin: 0; font-size: 13.5px; color: var(--dim); line-height: 1.85; }
.sd-main { padding: 26px; display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.sd-box { border-top: 1px solid var(--line-soft); padding-top: 12px; }
.sd-k { font-size: 9.5px; letter-spacing: .16em; color: var(--dimmer); }
.sd-box p { margin: 8px 0 0; font-size: 14px; color: var(--text); }
.sd-note { grid-column: 1 / -1; margin: 6px 0 0; font-size: 12.5px; color: var(--gold); border-top: 1px solid var(--line-soft); padding-top: 12px; }

/* ── 03 债权 ───────────────────────────────────────────── */
.cred-wrap { border: 1px solid var(--line); background: var(--ink-1); padding: 26px; }
.cred-line { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; }
.cred-part { flex: 1 1 200px; border-left: 1px solid var(--line); padding-left: 12px; }
.cred-part b { display: block; font-size: 14px; }
.cred-part em { display: block; font-style: normal; font-size: 11px; color: var(--dimmer); margin-top: 4px; line-height: 1.6; }
.cred-part.hi b { color: var(--gold); }
.op { color: var(--gold-dim); font-size: 16px; }
.cred-res { flex: 0 0 auto; border: 1px solid var(--gold-dim); padding: 8px 14px; }
.cred-res b { font-size: 14px; color: var(--gold); }

.chips { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.chip {
  appearance: none; cursor: pointer; text-align: left;
  border: 1px solid var(--line); background: rgba(8, 21, 31, .55);
  padding: 12px 16px; color: var(--text); transition: .2s; min-width: 132px;
  display: flex; flex-direction: column; gap: 1px;
}
.chip:hover { border-color: var(--line-hard); }
.chip.is-on { border-color: var(--gold); background: rgba(200, 164, 92, .09); }
.chip.is-bad.is-on { border-color: var(--red); background: var(--red-soft); }
.chip-t { font-size: 8.5px; letter-spacing: .18em; color: var(--dimmer); }
.chip-n { font-size: 14px; font-weight: 600; }
.chip-s { font-size: 10px; color: var(--dim); }

.cred-read { margin-top: 20px; border-top: 1px solid var(--line-soft); padding-top: 16px; display: flex; gap: 16px; align-items: flex-start; }
.cred-read .mono { font-size: 9.5px; letter-spacing: .16em; color: var(--dimmer); flex: 0 0 auto; padding-top: 3px; }
.cred-read p { margin: 0; font-size: 13.5px; color: var(--dim); }
.cred-read b.ok { color: var(--green); }
.cred-read b.bad { color: var(--red); }
.cred-read b { color: var(--text); }

.agreements { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 18px; }
.ag { border: 1px solid var(--line-soft); padding: 16px; background: rgba(10, 25, 37, .35); transition: .2s; }
.ag:hover { border-color: var(--line); }
.ag-k { font-size: 9px; letter-spacing: .18em; color: var(--gold-dim); }
.ag h4 { margin: 6px 0 6px; font-size: 15px; font-weight: 600; }
.ag p { margin: 0; font-size: 12px; color: var(--dim); line-height: 1.7; }

/* ── 04 走廊 ───────────────────────────────────────────── */
.legend { display: flex; flex-wrap: wrap; gap: 26px; margin-bottom: 22px; font-size: 11.5px; color: var(--dim); }
.lg { display: inline-block; width: 26px; height: 8px; margin-right: 8px; vertical-align: middle; }
.lg-info { border-top: 1px dashed var(--dim); background: none; height: 1px; }
.lg-fund { border-top: 2px solid var(--gold); background: none; height: 2px; }
.lg-recon { width: 7px; height: 7px; border-radius: 50%; background: var(--gold); }

.corridor-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; padding-bottom: 6px; }
.corridor { min-width: 820px; border: 1px solid var(--line); background: linear-gradient(180deg, rgba(16, 36, 53, .75), rgba(8, 21, 31, .6)); padding: 30px 26px 24px; }

.track { position: relative; padding: 46px 0 46px; }
.line { position: absolute; left: 8%; right: 8%; height: 1px; }
.line-info { top: 18px; border-top: 1px dashed rgba(242, 245, 247, .28); }
.line-fund { bottom: 18px; border-top: 2px solid rgba(200, 164, 92, .35); }
.line-info::before, .line-fund::after { content: ""; position: absolute; right: -6px; top: -4px; border: 4px solid transparent; }
.line-info::before { border-left-color: rgba(242, 245, 247, .4); }
.line-fund::after { border-left-color: rgba(200, 164, 92, .55); top: -5px; }

.dot { position: absolute; width: 9px; height: 9px; border-radius: 50%; transform: translate(-50%, -50%); transition: left .65s cubic-bezier(.4, 0, .2, 1), top .4s; z-index: 5; }
.dot-info { top: 18px; border: 1px solid var(--text); background: rgba(233, 238, 242, .2); box-shadow: 0 0 0 4px rgba(233, 238, 242, .05); }
.dot-fund { bottom: 10px; top: auto; background: var(--gold); box-shadow: 0 0 0 4px rgba(200, 164, 92, .16); }

.nodes { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; }
.node { border: 1px solid var(--line); padding: 14px 14px 12px; background: rgba(8, 21, 31, .6); transition: .3s; position: relative; }
.node.is-on { border-color: var(--gold); background: rgba(200, 164, 92, .10); box-shadow: 0 0 0 1px rgba(200, 164, 92, .2); }
.node.is-past { border-color: rgba(200, 164, 92, .4); }
.node .nid { font-size: 9px; letter-spacing: .18em; color: var(--dimmer); }
.node.is-on .nid { color: var(--gold); }
.node h4 { margin: 6px 0 2px; font-size: 15px; font-weight: 600; white-space: nowrap; }
.node p { margin: 0; font-size: 10.5px; color: var(--dimmer); }
.node .recon { position: absolute; right: 8px; bottom: 7px; font-size: 8px; letter-spacing: .1em; color: var(--gold-dim); opacity: 0; transition: .3s; }
.node.pulse .recon { opacity: 1; }
.node.pulse { box-shadow: 0 0 0 1px var(--gold), 0 0 18px rgba(200, 164, 92, .25); }

.crossbank { margin-top: 22px; border-top: 1px solid var(--line-soft); padding-top: 18px; }
.cb-label { font-size: 9px; letter-spacing: .16em; color: var(--dimmer); margin-bottom: 12px; }
.cb-rail { display: flex; align-items: center; gap: 12px; }
.cb-node { flex: 0 0 150px; border: 1px dashed var(--line); padding: 10px 12px; transition: .3s; }
.cb-node .nid { font-size: 9px; letter-spacing: .18em; color: var(--dimmer); }
.cb-node h4 { margin: 4px 0 2px; font-size: 13px; }
.cb-node p { margin: 0; font-size: 10px; color: var(--dimmer); }
.cb-node.is-on { border-color: var(--gold); border-style: solid; background: rgba(200, 164, 92, .1); }
.cb-link { flex: 1; text-align: center; font-size: 9px; letter-spacing: .12em; color: var(--dimmer); position: relative; }
.cb-link::before { content: ""; position: absolute; left: 0; right: 0; top: 50%; border-top: 1px dashed var(--line-hard); }
.cb-link span { position: relative; background: #0B1A26; padding: 0 10px; }
.cb-net { flex: 0 0 auto; border: 1px solid var(--gold-dim); padding: 8px 12px; display: flex; align-items: baseline; gap: 6px; }
.cb-net .mono { font-size: 8px; letter-spacing: .16em; color: var(--gold-dim); }
.cb-net b { font-family: var(--mono); font-size: 16px; color: var(--gold); }

.runner { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-top: 22px; flex-wrap: wrap; }
.runner-ctl { display: flex; gap: 10px; flex-wrap: wrap; }
.btn {
  appearance: none; cursor: pointer; border: 1px solid var(--line-hard);
  background: rgba(200, 164, 92, .1); color: var(--text);
  font-family: var(--mono); font-size: 11.5px; letter-spacing: .08em;
  padding: 10px 18px; transition: .2s;
}
.btn:hover { background: rgba(200, 164, 92, .2); border-color: var(--gold); }
.btn:active { transform: translateY(1px); }
.btn.ghost { background: none; color: var(--dim); border-color: var(--line); }
.btn.ghost:hover { color: var(--text); border-color: var(--line-hard); }
.btn.danger { background: var(--red-soft); border-color: rgba(196, 87, 74, .5); color: #E9B8B1; }
.btn.danger:hover { background: rgba(196, 87, 74, .2); border-color: var(--red); }
.btn:disabled { opacity: .4; cursor: default; }
.runner-time { border: 1px solid var(--line); padding: 8px 14px; font-size: 11px; color: var(--gold); letter-spacing: .1em; }

.runner-body { display: grid; grid-template-columns: 1.35fr .9fr; gap: 14px; margin-top: 14px; }
.evlog { border: 1px solid var(--line); background: rgba(8, 21, 31, .55); padding: 16px 18px; max-height: 296px; overflow-y: auto; }
.ev { display: flex; gap: 12px; padding: 8px 0; border-bottom: 1px solid var(--line-soft); animation: fadeUp .32s ease both; }
.ev:last-child { border-bottom: 0; }
.ev-t { flex: 0 0 62px; font-size: 10px; color: var(--dimmer); letter-spacing: .04em; padding-top: 3px; }
.ev p { margin: 0; font-size: 12.5px; line-height: 1.7; color: var(--dim); }
.ev p b { color: var(--text); }
.ev.ev-key .ev-t { color: var(--gold); }
.ev.ev-key p { color: var(--text); }
.ev.ev-idle p { color: var(--dimmer); }
.ev.ev-warn p b { color: var(--red); }

.expose { border: 1px solid var(--line); background: linear-gradient(170deg, rgba(200, 164, 92, .07), rgba(8, 21, 31, .5)); padding: 18px 20px; display: flex; flex-direction: column; }
.ex-k { font-size: 9px; letter-spacing: .18em; color: var(--gold-dim); }
.ex-v { display: flex; align-items: baseline; gap: 6px; margin: 8px 0 2px; }
.ex-v b { font-family: var(--mono); font-size: 30px; font-weight: 500; color: var(--gold); letter-spacing: .02em; }
.ex-v .mono { font-size: 10px; color: var(--gold-dim); }
.ex-formula { font-size: 9.5px; color: var(--dimmer); letter-spacing: .04em; border-top: 1px solid var(--line-soft); padding-top: 8px; margin-top: 6px; }
.expose #exNote { margin: 10px 0 0; font-size: 11.5px; color: var(--dim); line-height: 1.7; }

.expose.hot { border-color: rgba(200, 164, 92, .5); box-shadow: inset 0 0 0 1px rgba(200, 164, 92, .12); }

/* ── 05 清算模拟器 ─────────────────────────────────────── */
.clear-sim { display: grid; grid-template-columns: 1.15fr .85fr; gap: 18px; }
.cs-left { display: grid; gap: 14px; }
.cs-bank { border: 1px solid var(--line); background: rgba(10, 25, 37, .5); padding: 16px 18px; }
.cb-name { font-size: 9.5px; letter-spacing: .16em; color: var(--dimmer); }
.cs-row { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 11px 0; border-bottom: 1px dashed var(--line-soft); opacity: .35; transition: .3s; }
.cs-row.is-on { opacity: 1; }
.cs-row .cs-who { font-size: 12.5px; color: var(--dim); }
.cs-row .cs-amt { font-size: 14px; color: var(--text); }
.cs-row.is-on .cs-amt { color: var(--gold); }
.cs-total { display: flex; justify-content: space-between; padding-top: 12px; font-size: 10px; letter-spacing: .1em; color: var(--dimmer); }
.cs-total b { font-size: 15px; color: var(--gold); }

.cs-right { border: 1px solid var(--line); background: rgba(8, 21, 31, .45); padding: 18px 20px; }
.cs-actions { display: grid; gap: 8px; }
.cs-actions .btn { text-align: left; }
.cs-out { margin-top: 20px; border-top: 1px solid var(--line-soft); padding-top: 16px; }
.cs-metric { display: flex; align-items: baseline; justify-content: space-between; padding: 8px 0; }
.cs-metric .mono { font-size: 10px; letter-spacing: .08em; color: var(--dimmer); }
.cs-metric b { font-size: 24px; font-family: var(--mono); color: var(--text); }
.cs-metric i { font-size: 9px; font-style: normal; color: var(--dimmer); margin-left: 4px; }
.cs-bar { height: 8px; background: var(--line-soft); margin: 12px 0 10px; position: relative; }
.cs-bar i { position: absolute; left: 0; top: 0; height: 100%; width: 0; background: var(--dim); transition: width .6s; opacity: .45; }
.cs-bar i.gold { top: 2px; height: 4px; background: var(--gold); opacity: 1; }
.cs-note { margin: 12px 0 0; font-size: 11.5px; color: var(--dim); line-height: 1.7; }

/* ── 06 精算 ───────────────────────────────────────────── */
.calc { display: grid; grid-template-columns: .95fr 1.05fr; gap: 18px; }
.calc-in { border: 1px solid var(--line); background: rgba(10, 25, 37, .5); padding: 22px 24px; }
.ctl { display: block; margin-bottom: 26px; }
.ctl:last-child { margin-bottom: 0; }
.ctl-k { display: block; font-size: 11.5px; color: var(--dim); letter-spacing: .04em; margin-bottom: 12px; }
.ctl-k b { font-size: 14px; }
input[type="range"] { appearance: none; width: 100%; height: 2px; background: var(--line-hard); outline: none; }
input[type="range"]::-webkit-slider-thumb { appearance: none; width: 14px; height: 14px; background: var(--gold); border-radius: 50%; cursor: pointer; box-shadow: 0 0 0 4px rgba(200, 164, 92, .16); }
input[type="range"]::-moz-range-thumb { width: 14px; height: 14px; background: var(--gold); border: 0; border-radius: 50%; cursor: pointer; }
.ctl-scale { display: flex; justify-content: space-between; margin-top: 8px; font-size: 9px; color: var(--dimmer); font-style: normal; }
.ctl-scale i { font-style: normal; }
.seg { display: inline-flex; border: 1px solid var(--line); }
.seg button { appearance: none; border: 0; background: none; color: var(--dim); font-family: var(--mono); font-size: 11px; padding: 8px 18px; cursor: pointer; transition: .2s; }
.seg button.is-on { background: var(--gold-soft); color: var(--gold); }

.calc-out { border: 1px solid var(--line); background: linear-gradient(170deg, rgba(200, 164, 92, .06), rgba(8, 21, 31, .5)); padding: 22px 24px; }
.calc-hero .mono { font-size: 9.5px; letter-spacing: .16em; color: var(--gold-dim); }
.calc-big { display: flex; align-items: baseline; gap: 8px; margin: 6px 0 14px; }
.calc-big b { font-family: var(--mono); font-size: clamp(32px, 5vw, 44px); font-weight: 500; color: var(--gold); letter-spacing: .01em; line-height: 1.1; }
.calc-big i { font-style: normal; font-size: 11px; color: var(--gold-dim); }
.tank { height: 10px; background: var(--line-soft); position: relative; overflow: hidden; }
.tank i { position: absolute; inset: 0 auto 0 0; width: 20%; background: linear-gradient(90deg, var(--gold-dim), var(--gold)); transition: width .5s ease; }
.tank::after { content: ""; position: absolute; inset: 0; background-image: repeating-linear-gradient(90deg, transparent 0 9%, rgba(8, 21, 31, .5) 9% 10%); }

.calc-rows { margin-top: 20px; }
.calc-row { display: flex; justify-content: space-between; gap: 14px; padding: 10px 0; border-bottom: 1px solid var(--line-soft); font-size: 12px; color: var(--dim); }
.calc-row b { color: var(--text); font-size: 12.5px; white-space: nowrap; }
.calc-note { margin: 16px 0 0; font-size: 11.5px; color: var(--dim); line-height: 1.75; padding-top: 12px; border-top: 1px solid var(--line-soft); }
.calc-note b { color: var(--gold); }

/* ── 07 风险 ───────────────────────────────────────────── */
.ex-types { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 22px; }
.ex-type { border: 1px solid var(--line); padding: 16px 16px 14px; background: rgba(10, 25, 37, .4); }
.ex-type .mono { font-size: 9px; letter-spacing: .18em; color: var(--gold-dim); }
.ex-type h4 { margin: 7px 0 8px; font-size: 15px; font-weight: 600; }
.ex-type .ex-f { margin: 0 0 8px; font-size: 10.5px; color: var(--gold); letter-spacing: .02em; line-height: 1.6; }
.ex-type > p:last-child { margin: 0; font-size: 11.5px; color: var(--dim); line-height: 1.7; }

.matrix { border: 1px solid var(--line); }
.mx-row { appearance: none; width: 100%; text-align: left; cursor: pointer; background: none; color: inherit; border: 0; border-bottom: 1px solid var(--line-soft); padding: 0; display: grid; grid-template-columns: 48px 130px 1fr 118px 34px; align-items: center; font-family: var(--sans); transition: background .2s; }
.mx-row:last-child { border-bottom: 0; }
.mx-row:hover { background: rgba(200, 164, 92, .05); }
.mx-row.is-open { background: rgba(200, 164, 92, .07); }
.mx-i { padding: 16px 0 16px 16px; font-size: 10px; color: var(--dimmer); letter-spacing: .1em; }
.mx-k { font-size: 14px; font-weight: 600; padding: 16px 0; }
.mx-c { font-size: 10.5px; color: var(--dimmer); letter-spacing: .02em; padding-right: 10px; }
.mx-tag { font-size: 10px; color: var(--gold-dim); text-align: right; }
.mx-x { font-size: 15px; color: var(--dim); text-align: center; transition: transform .25s, color .25s; }
.mx-row.is-open .mx-x { transform: rotate(45deg); color: var(--gold); }
.mx-body { grid-column: 1 / -1; max-height: 0; overflow: hidden; transition: max-height .32s ease; text-align: left; }
.mx-row.is-open .mx-body { max-height: 200px; }
.mx-in { display: block; padding: 0 22px 18px 48px; font-size: 12.5px; color: var(--dim); line-height: 1.85; }
.mx-body strong { color: var(--gold); font-weight: 600; margin-right: 6px; }

.three-law { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 22px; }
.three-law .law { border: 1px solid var(--line-soft); border-top: 2px solid var(--gold-dim); padding: 18px; background: rgba(10, 25, 37, .35); }
.three-law .mono { font-size: 9px; letter-spacing: .18em; color: var(--dimmer); }
.three-law p { margin: 10px 0 0; font-size: 13px; color: var(--dim); line-height: 1.8; }
.three-law b { color: var(--text); }

/* ── 08 幂等 ───────────────────────────────────────────── */
.idem { border: 1px solid var(--line); background: rgba(10, 25, 37, .45); padding: 22px 24px; }
.idem-ctl { display: flex; flex-wrap: wrap; align-items: center; gap: 22px; padding-bottom: 18px; border-bottom: 1px solid var(--line-soft); }
.switch { display: inline-flex; align-items: center; gap: 10px; cursor: pointer; }
.switch input { display: none; }
.sw-ui { width: 38px; height: 20px; border: 1px solid var(--line-hard); position: relative; transition: .2s; }
.sw-ui::after { content: ""; position: absolute; top: 2px; left: 2px; width: 14px; height: 14px; background: var(--dim); transition: .2s; }
.switch input:checked + .sw-ui { border-color: var(--gold); background: var(--gold-soft); }
.switch input:checked + .sw-ui::after { left: 20px; background: var(--gold); }
.sw-t { font-size: 12px; color: var(--dim); }

.idem-grid { display: grid; grid-template-columns: 1.3fr .9fr; gap: 16px; padding-top: 18px; }
.idem-log { border-left: 1px solid var(--line-soft); padding-left: 16px; min-height: 150px; }
.il-row { font-size: 11.5px; color: var(--dim); padding: 7px 0; border-bottom: 1px dashed var(--line-soft); animation: fadeUp .3s ease both; }
.il-row.is-idle { color: var(--dimmer); }
.il-row b { color: var(--text); }
.il-row.is-bad b, .il-row.is-bad { color: #E0A39B; }
.il-row.is-ok b { color: var(--green); }

.idem-out { border-left: 1px solid var(--line-soft); padding-left: 18px; }
.io-row { display: flex; justify-content: space-between; padding: 7px 0; font-size: 11.5px; color: var(--dim); }
.io-row b { font-size: 13px; color: var(--text); }
.io-row.hi b { color: var(--red); font-size: 16px; }
.io-bar { height: 6px; background: var(--line-soft); margin: 12px 0 10px; }
.io-bar i { display: block; height: 100%; width: 0; background: var(--red); transition: width .5s; }
.io-bar.ok i { background: var(--green); }
#ioNote { margin: 0; font-size: 11px; color: var(--dimmer); line-height: 1.7; }

/* ── 09 账务 ───────────────────────────────────────────── */
.ledger { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.lg-card { border: 1px solid var(--line); background: linear-gradient(170deg, var(--ink-1), rgba(8, 21, 31, .6)); padding: 20px 22px; }
.lg-head { display: flex; justify-content: space-between; align-items: center; }
.lg-head .mono { font-size: 9px; letter-spacing: .16em; color: var(--dimmer); }
.lg-state { font-family: var(--mono); font-size: 9.5px; letter-spacing: .12em; padding: 3px 8px; border: 1px solid rgba(111, 169, 139, .5); color: var(--green); }
.lg-state.bad { border-color: rgba(196, 87, 74, .6); color: var(--red); }
.lg-balance { margin-top: 14px; }
.lg-balance .mono { font-size: 9.5px; letter-spacing: .14em; color: var(--dimmer); }
.lg-balance > div { display: flex; align-items: baseline; gap: 8px; margin: 4px 0 10px; }
.lg-balance b { font-family: var(--mono); font-size: 34px; font-weight: 500; color: var(--text); letter-spacing: .01em; }
.lg-balance i { font-style: normal; font-size: 10px; color: var(--dimmer); }
.lg-calc { font-size: 10px; color: var(--dimmer); margin: 0; }
.lg-diff { margin: 8px 0 0; font-size: 11px; color: var(--red); }
.lg-diff b { font-family: var(--mono); }

.lg-rows { border: 1px solid var(--line); background: rgba(8, 21, 31, .45); padding: 6px 18px; max-height: 190px; overflow-y: auto; }
.lg-row { display: grid; grid-template-columns: 34px 1fr auto; gap: 12px; align-items: center; padding: 10px 0; border-bottom: 1px dashed var(--line-soft); font-size: 12px; color: var(--dim); }
.lg-row:last-child { border-bottom: 0; }
.lg-row .mono { font-size: 9.5px; color: var(--dimmer); }
.lg-row b { font-size: 12.5px; color: var(--text); }
.lg-row.bad b { color: var(--red); }

.lg-actions { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 10px; }
.lg-alarm { grid-column: 1 / -1; border: 1px solid rgba(196, 87, 74, .45); background: var(--red-soft); padding: 14px 18px; display: flex; gap: 14px; align-items: flex-start; }
.lg-alarm .mono { font-size: 9px; letter-spacing: .16em; color: var(--red); flex: 0 0 auto; padding-top: 2px; }
.lg-alarm p { margin: 0; font-size: 12.5px; color: #E5C0BB; line-height: 1.8; }
.lg-alarm b { color: #F2D6D2; }

.model8 { margin-top: 34px; }
.model8 h3 { font-size: 15px; font-weight: 600; margin: 0 0 14px; color: var(--dim); letter-spacing: .02em; }
.m8 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.m8 > div { border: 1px solid var(--line-soft); padding: 14px; background: rgba(10, 25, 37, .3); }
.m8 .mono { font-size: 9px; letter-spacing: .16em; color: var(--dimmer); }
.m8 h4 { margin: 5px 0 5px; font-size: 13px; font-weight: 600; }
.m8 p { margin: 0; font-size: 11px; color: var(--dim); line-height: 1.65; }

/* ── 10 术语 / 自测 ────────────────────────────────────── */
.glossary { display: grid; grid-template-columns: 1fr 1fr; gap: 0; border: 1px solid var(--line); }
.gl { display: grid; grid-template-columns: 1.15fr .55fr 1.9fr; gap: 12px; padding: 11px 16px; border-bottom: 1px solid var(--line-soft); align-items: baseline; }
.gl:nth-child(odd) { border-right: 1px solid var(--line-soft); }
.gl .mono { font-size: 9.5px; color: var(--dim); letter-spacing: .02em; }
.gl span:nth-child(2) { font-size: 12.5px; font-weight: 600; }
.gl span:nth-child(3) { font-size: 11.5px; color: var(--dimmer); }

.quiz { margin-top: 18px; border: 1px solid var(--line); }
.q-item { appearance: none; width: 100%; text-align: left; background: none; border: 0; border-bottom: 1px solid var(--line-soft); color: inherit; padding: 0; cursor: pointer; display: grid; grid-template-columns: 46px 1fr; font-family: var(--sans); transition: background .2s; }
.q-item:last-child { border-bottom: 0; }
.q-item:hover { background: rgba(200, 164, 92, .045); }
.q-item.is-open { background: rgba(200, 164, 92, .06); }
.q-i { padding: 15px 0 15px 16px; font-size: 10px; color: var(--gold-dim); letter-spacing: .1em; }
.q-t { padding: 15px 18px 15px 0; font-size: 13.5px; color: var(--text); line-height: 1.7; }
.q-a { grid-column: 2; max-height: 0; overflow: hidden; transition: max-height .3s ease; font-size: 12.5px; color: var(--dim); line-height: 1.85; padding: 0 18px 0 0; }
.q-item.is-open .q-a { max-height: 180px; padding-bottom: 16px; }
.q-a::before { content: "答案 / "; font-family: var(--mono); font-size: 9px; letter-spacing: .12em; color: var(--gold-dim); }

/* ── FOOTER ───────────────────────────────────────────── */
.foot { padding: 62px 0 40px; background: linear-gradient(180deg, rgba(8, 21, 31, 0), rgba(8, 21, 31, .7)); }
.foot-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 40px; }
.foot-main > .mono, .foot-side > .mono { font-size: 9px; letter-spacing: .18em; color: var(--dimmer); }
.foot-main h3 { font-size: 24px; font-weight: 600; margin: 8px 0 6px; }
.foot-main p { margin: 0 0 18px; font-size: 13px; color: var(--dim); }
.db-link { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; border: 1px solid var(--gold-dim); padding: 10px 16px; transition: .2s; }
.db-link:hover { background: var(--gold-soft); border-color: var(--gold); }
.db-link .mono { font-size: 8.5px; letter-spacing: .18em; color: var(--gold-dim); }
.db-link b { font-size: 13px; color: var(--text); font-weight: 600; }
.db-link i { font-style: normal; color: var(--gold); font-size: 13px; }
.foot-side p { margin: 8px 0 16px; font-size: 12px; color: var(--dim); line-height: 1.8; }
.inline-link { color: var(--gold); text-decoration: none; border-bottom: 1px solid var(--gold-dim); }
.foot-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px; margin-top: 44px; padding-top: 18px; border-top: 1px solid var(--line-soft); font-size: 9.5px; letter-spacing: .12em; color: var(--dimmer); }

/* ── 动画 ─────────────────────────────────────────────── */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .001ms !important; transition-duration: .001ms !important; }
  html { scroll-behavior: auto; }
}

/* ── 响应式 ───────────────────────────────────────────── */
@media (max-width: 1000px) {
  .term-grid, .ex-types { grid-template-columns: repeat(2, 1fr); }
  .agreements { grid-template-columns: repeat(2, 1fr); }
  .m8 { grid-template-columns: repeat(2, 1fr); }
  .runner-body, .clear-sim, .calc, .idem-grid, .ledger { grid-template-columns: 1fr; }
  .steps { grid-template-columns: repeat(3, 1fr); }
  .step-detail { grid-template-columns: 1fr; }
  .sd-side { border-right: 0; border-bottom: 1px solid var(--line); }
  .three-law { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr; gap: 26px; }
  .glossary { grid-template-columns: 1fr; }
  .gl:nth-child(odd) { border-right: 0; }
  .stamp { display: none; }
  .idem-out { border-left: 0; border-top: 1px solid var(--line-soft); padding-left: 0; padding-top: 16px; }
  .idem-log { border-left: 0; padding-left: 0; }
}
@media (max-width: 700px) {
  .wrap { padding: 0 18px; }
  .sec { padding: 60px 0 52px; }
  .hero { padding: 56px 0 48px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .hero-law { flex-direction: column; }
  .law-sep { width: 100%; height: 34px; background: none; }
  .law-sep::after { top: 50%; left: 50%; }
  .law-cell { padding: 18px 20px; }
  .topnav { display: none; }
  .term-grid, .ex-types, .steps, .agreements { grid-template-columns: 1fr 1fr; }
  .sd-main { grid-template-columns: 1fr; }
  .mx-row { grid-template-columns: 38px 1fr 34px; }
  .mx-c, .mx-tag { display: none; }
  .mx-in { padding-left: 18px; }
  .gl { grid-template-columns: 1fr; gap: 2px; padding: 10px 14px; }
  .gl span:nth-child(3) { margin-bottom: 4px; }
  .cred-line { flex-direction: column; align-items: stretch; }
  .op { display: none; }
  .cred-wrap { padding: 18px; }
  .corridor { min-width: 760px; }
  .calc-in, .calc-out { padding: 18px; }
  .calc-big b { font-size: 30px; }
  .cs-left, .cs-right { padding: 14px; }
}

/* ── 11 动效索引 ──────────────────────────────────────── */
.fx { border: 1px solid var(--line); }
.fx-row {
  display: grid; grid-template-columns: 48px 150px 190px 1fr; align-items: baseline;
  gap: 14px; padding: 15px 18px; border-bottom: 1px solid var(--line-soft);
  text-decoration: none; color: inherit; transition: background .2s;
}
.fx-row:last-child { border-bottom: 0; }
.fx-row:hover { background: rgba(200, 164, 92, .06); }
.fx-n { font-size: 10px; color: var(--gold-dim); letter-spacing: .1em; }
.fx-t { font-size: 14px; font-weight: 600; }
.fx-c { font-size: 11.5px; color: var(--dim); }
.fx-w { font-size: 12px; color: var(--dimmer); line-height: 1.7; }
@media (max-width: 700px) {
  .fx-row { grid-template-columns: 34px 1fr; gap: 4px 10px; padding: 13px 14px; }
  .fx-c { grid-column: 2; }
  .fx-w { grid-column: 2; }
}