/* =========================================================
   证据链 · 推广页样式
   纯静态，无外部依赖
   ========================================================= */

:root {
  --paper: #faf8f4;
  --paper-2: #f3efe7;
  --paper-3: #ece6da;
  --white: #ffffff;
  --ink: #101a2b;
  --ink-2: #26334a;
  --ink-3: #3c4a60;
  --muted: #5d6a7c;
  --muted-2: #7b8696;
  --line: #e4ded2;
  --line-2: #d5cdbd;
  --gold: #a67c33;
  --gold-deep: #856022;
  --gold-2: #c2a05f;
  --gold-soft: #f4ecdc;
  --green: #2f6b4f;
  --green-soft: #e8f1ea;
  --amber: #93641c;
  --amber-soft: #fbf0d9;
  --red: #98403a;
  --red-soft: #f8e9e6;
  --shadow-sm: 0 12px 30px -22px rgba(16, 26, 43, .38);
  --shadow: 0 28px 70px -38px rgba(16, 26, 43, .42);
  --radius: 18px;
  --serif: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  --mono: "SFMono-Regular", "SF Mono", Menlo, Consolas, monospace;
}

/* ---------- Reset & base ---------- */

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.78;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.32;
  letter-spacing: .01em;
  margin: 0;
  color: var(--ink);
}

p { margin: 0; }
ul, ol, dl, dd { margin: 0; padding: 0; }
li { list-style: none; }
a { color: inherit; text-decoration: none; }
strong { font-weight: 600; color: var(--ink); }
em { font-style: normal; }

::selection {
  background: var(--gold-2);
  color: var(--ink);
}

:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
  border-radius: 4px;
}

.wrap {
  width: min(1160px, calc(100% - 48px));
  margin-inline: auto;
}

.skip {
  position: fixed;
  top: -100px;
  left: 20px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--ink);
  color: #fff;
  border-radius: 0 0 10px 10px;
  font-size: 14px;
  transition: top .2s;
}
.skip:focus { top: 0; }

/* ---------- Typography helpers ---------- */

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .18em;
  color: var(--gold-deep);
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--gold-2);
  flex: 0 0 auto;
}

.section { padding: 100px 0; }
.section-tint { background: var(--paper-2); }

.section-head {
  max-width: 780px;
  margin-bottom: 48px;
}
.section-head h2 {
  font-size: clamp(29px, 3.5vw, 43px);
  margin-bottom: 20px;
}
.section-lead {
  color: var(--muted);
  font-size: 16.5px;
  max-width: 62ch;
}

.mark {
  position: relative;
  color: var(--gold-deep);
  background: linear-gradient(transparent 63%, rgba(194, 160, 95, .42) 63%);
  padding: 0 2px;
}
.light-mark {
  color: var(--gold-2);
  background: linear-gradient(transparent 66%, rgba(194, 160, 95, .3) 66%);
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  border: 1px solid var(--ink);
  border-radius: 999px;
  background: var(--ink);
  color: #fff;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: .02em;
  line-height: 1.2;
  cursor: pointer;
  transition: transform .25s ease, background .25s ease, color .25s ease,
    border-color .25s ease, box-shadow .25s ease;
}
.btn:hover {
  background: #1c2b43;
  transform: translateY(-2px);
  box-shadow: 0 16px 32px -20px rgba(16, 26, 43, .8);
}
.btn .arrow {
  transition: transform .25s ease;
}
.btn:hover .arrow { transform: translateX(4px); }

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line-2);
}
.btn-ghost:hover {
  background: var(--white);
  border-color: var(--ink);
  color: var(--ink);
}

.btn-sm { padding: 10px 20px; font-size: 14px; }

.btn-gold {
  background: var(--gold-2);
  border-color: var(--gold-2);
  color: #1a1305;
}
.btn-gold:hover {
  background: #d2b47c;
  border-color: #d2b47c;
  color: #1a1305;
}

/* ---------- Header ---------- */

.site-head {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 248, 244, .84);
  backdrop-filter: saturate(160%) blur(16px);
  -webkit-backdrop-filter: saturate(160%) blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s ease, box-shadow .3s ease;
}
.site-head.scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 12px 30px -26px rgba(16, 26, 43, .5);
}
.head-inner {
  display: flex;
  align-items: center;
  gap: 28px;
  min-height: 76px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex: 0 0 auto;
}
.brand-mark {
  width: 38px;
  height: 38px;
  display: block;
}
.brand-text {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: .06em;
  line-height: 1.2;
  display: flex;
  flex-direction: column;
}
.brand-text em {
  font-family: var(--sans);
  font-size: 9.5px;
  font-weight: 500;
  letter-spacing: .16em;
  color: var(--muted-2);
  margin-top: 3px;
}
.nav {
  display: flex;
  align-items: center;
  gap: 26px;
  margin-left: auto;
}
.nav a {
  position: relative;
  font-size: 14px;
  color: var(--ink-2);
  padding: 6px 0;
  transition: color .2s;
}
.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s ease;
}
.nav a:hover { color: var(--ink); }
.nav a:hover::after { transform: scaleX(1); }

.head-cta { flex: 0 0 auto; }

.menu-btn {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--line-2);
  border-radius: 12px;
  background: transparent;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.menu-btn span {
  display: block;
  width: 17px;
  height: 1.5px;
  background: var(--ink);
  transition: transform .25s ease, opacity .2s ease;
}
.menu-btn[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.menu-btn[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-btn[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ---------- Hero ---------- */

.hero {
  position: relative;
  padding-top: 80px;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: -20% -10% auto auto;
  width: 760px;
  height: 760px;
  background: radial-gradient(circle at 50% 50%, rgba(194, 160, 95, .18), transparent 62%);
  pointer-events: none;
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(16, 26, 43, .045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(16, 26, 43, .045) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse 80% 60% at 60% 20%, #000 10%, transparent 72%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 60% 20%, #000 10%, transparent 72%);
  pointer-events: none;
}
.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.04fr .96fr;
  align-items: center;
  gap: 64px;
  padding-bottom: 72px;
}
.hero h1 {
  font-size: clamp(38px, 4.4vw, 60px);
  line-height: 1.18;
  letter-spacing: .005em;
  margin-bottom: 26px;
}
.lead {
  font-size: 17px;
  color: var(--ink-3);
  max-width: 58ch;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}
.hero-points {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 22px;
  margin-top: 30px;
  font-size: 13px;
  color: var(--muted);
  letter-spacing: .04em;
}
.hero-points li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.hero-points li::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--gold-2);
}

/* Dossier card */

.hero-art {
  position: relative;
  justify-self: end;
  width: 100%;
  max-width: 480px;
}
.dossier {
  position: relative;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 9px;
  box-shadow: var(--shadow);
  transform: rotate(-1.4deg);
  transition: transform .5s cubic-bezier(.2, .8, .2, 1);
}
.dossier:hover { transform: rotate(0deg) translateY(-4px); }
.dossier-inner {
  border: 1px dashed var(--line-2);
  border-radius: 15px;
  padding: 24px 24px 18px;
}
.dossier-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--muted-2);
}
.mono { font-family: var(--mono); letter-spacing: .06em; }
.dossier-title {
  font-size: 20px;
  margin: 12px 0 5px;
}
.dossier-goal {
  font-size: 13.5px;
  color: var(--muted);
  margin-bottom: 16px;
}
.ev-list li {
  display: grid;
  grid-template-columns: 26px 1fr auto;
  align-items: center;
  gap: 10px;
  padding: 13px 0;
  border-top: 1px dashed var(--line);
}
.ev-idx {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--gold);
  letter-spacing: .05em;
}
.ev-name {
  display: flex;
  flex-direction: column;
  font-size: 14.5px;
  line-height: 1.45;
  color: var(--ink);
}
.ev-name small {
  font-size: 11.5px;
  color: var(--muted-2);
  margin-top: 2px;
}
.pill {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 500;
  white-space: nowrap;
  border: 1px solid transparent;
}
.pill.ok { background: var(--green-soft); color: var(--green); border-color: #cfe2d6; }
.pill.half { background: var(--amber-soft); color: var(--amber); border-color: #eddcb7; }
.pill.gap { background: var(--red-soft); color: var(--red); border-color: #eed3cf; }
.pill.bad { background: #f7e4df; color: #8f3a2f; border-color: #e8c8c0; }
.pill.todo { background: #f1f3f6; color: var(--muted); border-color: #dde2e9; border-style: dashed; }

.dossier-foot {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  padding-top: 15px;
  margin-top: 4px;
  font-size: 10.5px;
  letter-spacing: .08em;
  color: var(--muted-2);
  border-top: 1px solid var(--line);
}

.art-stamp {
  position: absolute;
  right: -20px;
  bottom: -18px;
  padding: 9px 18px;
  background: var(--ink);
  color: #efe8d8;
  font-family: var(--serif);
  font-size: 12.5px;
  letter-spacing: .18em;
  border-radius: 999px;
  box-shadow: var(--shadow-sm);
  transform: rotate(2deg);
}

/* Stats */

.stat-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding: 26px 0 34px;
  border-top: 1px solid var(--line);
}
.stat dt {
  font-family: var(--serif);
  font-size: 21px;
  color: var(--ink);
  margin-bottom: 3px;
}
.stat dd {
  font-size: 12.5px;
  color: var(--muted);
  letter-spacing: .03em;
}

/* ---------- Cards / Why ---------- */

.card-grid {
  display: grid;
  gap: 22px;
}
.card-grid.three { grid-template-columns: repeat(3, 1fr); }

.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 28px;
  transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-sm);
  border-color: var(--line-2);
}
.card-num {
  display: block;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--gold);
  letter-spacing: .14em;
  margin-bottom: 16px;
}
.card h3 {
  font-size: 20px;
  margin-bottom: 10px;
}
.card p {
  font-size: 14.5px;
  color: var(--muted);
}

.contrast {
  display: grid;
  grid-template-columns: 1.08fr .92fr;
  gap: 22px;
  margin-top: 26px;
}
.panel {
  padding: 34px 32px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.panel-tint {
  background:
    linear-gradient(180deg, rgba(244, 236, 220, .72), rgba(244, 236, 220, .35)),
    var(--white);
}
.panel-title {
  font-size: 20px;
  margin-bottom: 18px;
}
.panel-intro {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 18px;
}
.steps {
  counter-reset: step;
}
.steps li {
  counter-increment: step;
  position: relative;
  padding-left: 42px;
  font-size: 14.5px;
  color: var(--muted);
}
.steps li + li { margin-top: 16px; }
.steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 2px;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--gold-2);
  color: var(--gold-deep);
  font-family: var(--mono);
  font-size: 11.5px;
}
.cost-list li {
  position: relative;
  padding-left: 20px;
  font-size: 14.5px;
  color: var(--muted);
}
.cost-list li + li { margin-top: 14px; }
.cost-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold-2);
}

.pull-quote {
  margin: 64px 0 0;
  padding: 4px 0 4px 30px;
  border-left: 3px solid var(--gold-2);
  font-family: var(--serif);
  font-size: clamp(21px, 2.4vw, 29px);
  line-height: 1.6;
  color: var(--ink);
}
.pull-quote em { color: var(--gold-deep); }
.pull-quote.center {
  border-left: 0;
  padding: 0;
  text-align: center;
  margin-top: 56px;
}

/* ---------- Dark band ---------- */

.band {
  background: var(--ink);
  color: #e9e3d6;
  padding: 76px 0;
  position: relative;
  overflow: hidden;
}
.band::before {
  content: "";
  position: absolute;
  inset: auto -15% -60% 45%;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(194, 160, 95, .16), transparent 65%);
  pointer-events: none;
}
.band-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.eyebrow.light { color: var(--gold-2); }
.eyebrow.light::before { background: rgba(194, 160, 95, .6); }
.band h2 {
  color: #f4f0e8;
  font-size: clamp(27px, 3.4vw, 40px);
}
.band-body p {
  font-size: 15.5px;
  color: #b9c0cc;
}
.band-em {
  margin-top: 16px;
  font-family: var(--serif);
  font-size: 19px;
  color: #e7dcc4;
}

/* ---------- Stages ---------- */

.chain-nav {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 22px;
  margin-bottom: 10px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 12.5px;
  letter-spacing: .05em;
  color: var(--ink-3);
  overflow-x: auto;
}
.chain-nav span { white-space: nowrap; }
.chain-nav i {
  flex: 1 0 24px;
  height: 1px;
  background: linear-gradient(to right, var(--line-2), var(--gold-2), var(--line-2));
  position: relative;
}
.chain-nav i::after {
  content: "";
  position: absolute;
  right: 0;
  top: -2.5px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold-2);
}

.stage {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 56px;
  padding: 52px 0;
  border-top: 1px solid var(--line-2);
}
.stage:first-of-type { margin-top: 26px; }
.stage:last-of-type { border-bottom: 1px solid var(--line-2); }
.stage-head { align-self: start; }
.stage-head h3 {
  font-size: clamp(22px, 2.1vw, 27px);
  margin-top: 10px;
}
.stage-num {
  font-family: var(--serif);
  font-size: 54px;
  line-height: 1;
  color: var(--gold-2);
  opacity: .9;
}
.stage-kicker {
  margin-top: 14px;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--gold-deep);
  font-weight: 600;
}
.stage-body { min-width: 0; }
.stage-body > * + * { margin-top: 28px; }
.sub-title {
  font-size: 18.5px;
  margin-bottom: 12px;
}
.body-text {
  font-size: 15px;
  color: var(--ink-3);
}
.body-text.muted { color: var(--muted); font-size: 14.5px; }
.decision {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 18px;
}
.tag {
  display: inline-flex;
  padding: 3px 12px;
  border-radius: 999px;
  background: var(--ink);
  color: #f1ece1;
  font-size: 11.5px;
  letter-spacing: .12em;
  flex: 0 0 auto;
}

/* Tables */

.table-wrap {
  overflow-x: auto;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 14px;
  -webkit-overflow-scrolling: touch;
}
table {
  width: 100%;
  min-width: 0;
  border-collapse: collapse;
  font-size: 14px;
  line-height: 1.65;
}
table.wide { min-width: 620px; }
.table-hint { display: none; }
thead th {
  padding: 12px 18px;
  text-align: left;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .08em;
  color: #6d6353;
  background: #f7f3ea;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
tbody td {
  padding: 13px 18px;
  border-top: 1px solid #efe9de;
  color: var(--muted);
  vertical-align: top;
}
tbody tr:first-child td { border-top: 0; }
tbody tr:hover td { background: #fbf9f4; }
tbody td strong { color: var(--ink); font-weight: 600; }

/* Answers */

.answers {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 18px;
}
.answer {
  padding: 16px 18px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--white);
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.answer strong {
  font-family: var(--serif);
  font-size: 18px;
}
.answer span { font-size: 12px; color: var(--muted); }
.answer.ok { border-color: #cfe2d6; background: var(--green-soft); }
.answer.ok strong { color: var(--green); }
.answer.none { background: #f5f6f8; }
.answer.bad { border-color: #eed3cf; background: var(--red-soft); }
.answer.bad strong { color: var(--red); }

/* Recalc */

.recalc {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.recalc-item {
  position: relative;
  padding: 20px 18px 18px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 14px;
  border-top: 3px solid var(--line-2);
}
.recalc-item.add { border-top-color: var(--gold-2); }
.recalc-item.move { border-top-color: #d3a441; }
.recalc-item.new { border-top-color: var(--red); }
.recalc-tag {
  display: inline-block;
  margin-bottom: 8px;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--muted-2);
}
.recalc-item.move .recalc-tag { color: #93641c; }
.recalc-item.new .recalc-tag { color: var(--red); }
.recalc-item p {
  font-size: 13.5px;
  color: var(--ink-3);
  line-height: 1.65;
}

.note-card {
  padding: 26px 30px;
  background: var(--ink);
  color: #c9cfd9;
  border-radius: var(--radius);
}
.note-card h4 {
  color: #f2ece0;
  font-size: 18.5px;
  margin-bottom: 8px;
}
.note-card p { font-size: 14.5px; }

.outcome {
  padding: 28px 30px;
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .55);
}
.outcome-title {
  font-family: var(--serif);
  font-size: 18px;
  margin-bottom: 14px;
}
.outcome ul { display: grid; gap: 8px; }
.outcome li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  color: var(--muted);
}
.outcome li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--gold);
}

/* Docs */

.doc-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.doc-card {
  padding: 22px 20px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 14px;
  transition: transform .3s ease, box-shadow .3s ease;
}
.doc-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm);
}
.doc-num {
  font-family: var(--serif);
  font-size: 13px;
  color: var(--gold);
  letter-spacing: .1em;
}
.doc-card h4 {
  font-size: 18px;
  margin: 8px 0 6px;
}
.doc-card p {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.6;
}

.placeholder {
  margin-bottom: 16px;
  padding: 18px 22px;
  border: 1px dashed #d8bd88;
  border-radius: 12px;
  background: #fdf7e9;
  color: #6f521c;
  font-size: 14px;
  line-height: 1.7;
}

/* ---------- Checks ---------- */

.check-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.check-card {
  padding: 30px 28px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
}
.check-idx {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  margin-bottom: 18px;
  border-radius: 50%;
  border: 1px solid var(--gold-2);
  color: var(--gold-deep);
  font-family: var(--serif);
  font-size: 14px;
}
.check-card h3 {
  font-size: 21px;
  margin-bottom: 10px;
}
.check-card > p {
  font-size: 14.5px;
  color: var(--muted);
}
.verify {
  margin-top: auto;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: 13px !important;
  color: var(--ink-3) !important;
}
.verify span {
  display: block;
  margin-bottom: 4px;
  font-size: 10.5px;
  letter-spacing: .16em;
  color: var(--gold-deep);
}

.truth-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
  margin-top: 22px;
}
.truth {
  padding: 26px 28px;
  border-radius: var(--radius);
  background: var(--paper-2);
  border: 1px solid transparent;
}
.truth h4 {
  font-size: 17px;
  margin-bottom: 8px;
}
.truth p {
  font-size: 14px;
  color: var(--muted);
}

/* ---------- 30 秒看懂 ---------- */

.quick-grid {
  display: grid;
  grid-template-columns: 1.12fr .88fr;
  gap: 22px;
  align-items: stretch;
}
.quick-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 26px 10px;
  box-shadow: var(--shadow-sm);
}
.quick-case-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  padding-bottom: 14px;
  margin-bottom: 4px;
  border-bottom: 1px solid var(--line);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--muted);
}
.quick-card .table-wrap {
  border: 0;
  border-radius: 0;
  background: transparent;
}
.quick-card thead th {
  padding-left: 0;
  padding-right: 0;
  background: transparent;
}
.quick-card tbody td {
  padding-left: 0;
  padding-right: 0;
}
.quick-table td:last-child,
.quick-table th:last-child { text-align: right; }

.quick-result {
  display: flex;
  flex-direction: column;
  padding: 32px 32px 28px;
  background: var(--ink);
  color: #c9cfd9;
  border-radius: var(--radius);
  position: relative;
  overflow: hidden;
}
.quick-result::before {
  content: "";
  position: absolute;
  right: -30%;
  bottom: -50%;
  width: 380px;
  height: 380px;
  background: radial-gradient(circle, rgba(194, 160, 95, .14), transparent 65%);
  pointer-events: none;
}
.quick-result-kicker {
  position: relative;
  margin-bottom: 8px;
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--gold-2);
}
.quick-result h3 {
  position: relative;
  color: #f4efe4;
  font-size: clamp(21px, 2.2vw, 25px);
  margin-bottom: 20px;
}
.quick-result ul {
  position: relative;
  display: grid;
  gap: 12px;
}
.quick-result li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.72;
}
.quick-result li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .74em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--gold-2);
}
.quick-result strong { color: #f2ece0; }
.quick-result-foot {
  position: relative;
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, .13);
  font-family: var(--serif);
  font-size: 15px;
  color: #e7dcc4;
}

.quick-strip {
  margin-top: 26px;
  padding: 22px 28px;
  border-left: 3px solid var(--gold-2);
  background: var(--gold-soft);
  border-radius: 0 14px 14px 0;
  font-family: var(--serif);
  font-size: clamp(17px, 1.9vw, 21px);
  line-height: 1.7;
  color: var(--ink-2);
}
.quick-strip strong { color: var(--gold-deep); }

/* ---------- 适用案由 ---------- */

.mini-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.mini-card {
  padding: 26px 24px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 16px;
  transition: transform .3s ease, box-shadow .3s ease;
}
.mini-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm);
}
.mini-tag {
  display: inline-block;
  margin-bottom: 14px;
  padding: 3px 11px;
  border-radius: 999px;
  background: var(--gold-soft);
  color: var(--gold-deep);
  font-size: 11px;
  letter-spacing: .08em;
}
.mini-card h3 {
  font-size: 17px;
  margin-bottom: 8px;
}
.mini-card p {
  font-size: 13.5px;
  color: var(--muted);
}

/* ---------- Limits ---------- */

.limit-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.limit-card {
  padding: 26px 22px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: transparent;
}
.limit-mark {
  display: block;
  font-family: var(--serif);
  font-size: 30px;
  line-height: 1;
  color: var(--line-2);
  margin-bottom: 18px;
}
.limit-card h3 {
  font-size: 17px;
  margin-bottom: 6px;
}
.limit-card p {
  font-size: 13px;
  color: var(--muted);
}
.limit-quote {
  margin-top: 62px;
  text-align: center;
  font-family: var(--serif);
  font-size: clamp(22px, 2.6vw, 31px);
  line-height: 1.55;
  color: var(--ink);
}

/* ---------- Start ---------- */

.start {
  background: var(--ink);
  color: #e9e3d6;
  position: relative;
  overflow: hidden;
}
.start::before {
  content: "";
  position: absolute;
  inset: -30% -10% auto auto;
  width: 680px;
  height: 680px;
  background: radial-gradient(circle, rgba(194, 160, 95, .14), transparent 65%);
  pointer-events: none;
}
.start .wrap { position: relative; }
.start .section-head h2 { color: #f4f0e8; }
.start .eyebrow { color: var(--gold-2); }
.start .eyebrow::before { background: rgba(194, 160, 95, .6); }

.start-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  counter-reset: none;
}
.start-steps li {
  padding: 26px 26px 28px;
  border: 1px solid rgba(233, 227, 214, .16);
  border-radius: 16px;
  background: rgba(255, 255, 255, .03);
}
.step-num {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  margin-bottom: 16px;
  border-radius: 50%;
  border: 1px solid rgba(194, 160, 95, .55);
  color: var(--gold-2);
  font-family: var(--mono);
  font-size: 13px;
}
.start-steps h3 {
  color: #f2ece0;
  font-size: 19px;
  margin-bottom: 8px;
}
.start-steps p {
  font-size: 14px;
  color: #a9b2c0;
}
.start-steps strong { color: #e7dcc4; }

.prompt-sample {
  margin: 34px 0 0;
  padding: 24px 28px;
  border-left: 2px solid var(--gold-2);
  background: rgba(255, 255, 255, .045);
  border-radius: 0 12px 12px 0;
  font-family: var(--serif);
  font-size: clamp(16px, 1.8vw, 20px);
  line-height: 1.7;
  color: #efe7d6;
}

.start-note {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  margin-top: 28px;
  font-size: 14.5px;
  color: #a9b2c0;
}
.blind-test {
  padding-left: 20px;
  border-left: 1px solid rgba(194, 160, 95, .45);
}
.blind-test strong { color: #e7dcc4; }

.start-cta {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  margin-top: 44px;
  padding-top: 34px;
  border-top: 1px solid rgba(233, 227, 214, .14);
}
.start-cta p {
  font-size: 13px;
  color: #8f99a8;
}

/* ---------- FAQ ---------- */

.faq-wrap { max-width: 900px; }
.faq {
  border-top: 1px solid var(--line);
}
.faq details {
  border-bottom: 1px solid var(--line);
}
.faq summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 24px 4px;
  font-family: var(--serif);
  font-size: 18px;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
  transition: color .2s;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary:hover { color: var(--gold-deep); }
.faq summary::after {
  content: "+";
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border: 1px solid var(--line-2);
  border-radius: 50%;
  font-family: var(--sans);
  font-size: 18px;
  font-weight: 300;
  color: var(--gold-deep);
  transition: transform .25s ease, background .25s ease;
}
.faq details[open] summary::after {
  transform: rotate(45deg);
  background: var(--gold-soft);
}
.faq-body {
  padding: 0 56px 26px 4px;
  font-size: 14.5px;
  color: var(--muted);
}
.faq-body strong { color: var(--ink); }

/* ---------- Final ---------- */

.final {
  padding: 110px 0;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(194, 160, 95, .25), transparent 58%),
    var(--ink);
  color: #f2ece0;
  text-align: center;
}
.final-inner { display: flex; flex-direction: column; align-items: center; }
.final .eyebrow { color: var(--gold-2); }
.final .eyebrow::before { background: rgba(194, 160, 95, .6); }
.m-break { display: none; }
.final h2 {
  color: #f7f2e7;
  font-size: clamp(29px, 4vw, 46px);
  line-height: 1.42;
  margin-bottom: 36px;
}

/* ---------- Footer ---------- */

.site-foot {
  background: #0b1420;
  color: #8f99a8;
  padding: 56px 0 44px;
  font-size: 13px;
}
.foot-grid {
  display: grid;
  grid-template-columns: 1.1fr .9fr 1.4fr;
  gap: 48px;
}
.site-foot .brand-text { color: #e9e3d6; }
.site-foot .brand-text em { color: #7b8696; }
.foot-tag {
  margin-top: 16px;
  color: #7b8696;
}
.foot-nav {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.foot-nav a { color: #a9b2c0; transition: color .2s; }
.foot-nav a:hover { color: var(--gold-2); }
.foot-legal p { line-height: 1.8; }
.copyright {
  margin-top: 16px;
  color: #5f6b7c;
  font-size: 12px;
  letter-spacing: .04em;
}

/* ---------- Reveal ---------- */

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .7s cubic-bezier(.2, .7, .2, 1),
    transform .7s cubic-bezier(.2, .7, .2, 1);
}
.reveal.in {
  opacity: 1;
  transform: none;
}

/* ---------- Responsive ---------- */

@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    padding-bottom: 56px;
  }
  .hero-art {
    justify-self: start;
    max-width: 520px;
  }
  .art-stamp { right: 10px; }
}

@media (max-width: 1060px) {
  .hero-grid { gap: 40px; }
  .stage { grid-template-columns: 250px 1fr; gap: 32px; }
  .doc-grid { grid-template-columns: repeat(2, 1fr); }
  .limit-grid { grid-template-columns: repeat(2, 1fr); }
  .quick-grid { grid-template-columns: 1fr; }
  .mini-grid { grid-template-columns: repeat(2, 1fr); }
  .start-note { grid-template-columns: 1fr; gap: 18px; }
  .blind-test { border-left: 0; padding-left: 0; }
}

@media (max-width: 900px) {
  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding: 12px 24px 24px;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 24px 40px -36px rgba(16, 26, 43, .6);
  }
  .nav.open { display: flex; }
  .nav a { padding: 10px 0; font-size: 15px; }
  .head-cta { margin-left: auto; }
  .menu-btn { display: flex; }

  .hero { padding-top: 56px; }
  .stat-strip { grid-template-columns: repeat(2, 1fr); gap: 20px 24px; }
  .card-grid.three { grid-template-columns: 1fr; }
  .contrast { grid-template-columns: 1fr; }
  .band-grid { grid-template-columns: 1fr; gap: 28px; }
  .stage { grid-template-columns: 1fr; gap: 26px; padding: 44px 0; }
  .stage-num { font-size: 42px; }
  .stage-head { display: grid; grid-template-columns: auto 1fr; column-gap: 18px; align-items: center; }
  .stage-num { grid-row: span 2; }
  .stage-kicker { margin-top: 0; }
  .stage-head h3 { grid-column: 2; margin-top: 2px; }
  .check-grid { grid-template-columns: 1fr; }
  .truth-row { grid-template-columns: 1fr; }
  .start-steps { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr; gap: 32px; }
  .foot-nav { flex-direction: row; flex-wrap: wrap; gap: 8px 20px; }
}

@media (max-width: 640px) {
  .wrap { width: calc(100% - 32px); }
  .section { padding: 72px 0; }
  .head-inner { min-height: 66px; gap: 14px; }
  .brand-text { font-size: 17px; }
  .brand-text em { font-size: 8.5px; }
  .brand-mark { width: 34px; height: 34px; }
  .head-cta { display: none; }
  .menu-btn { margin-left: auto; }
  .hero h1 { font-size: clamp(34px, 9.6vw, 46px); }
  .lead { font-size: 15.5px; }
  .dossier-inner { padding: 20px 18px 16px; }
  .dossier-title { font-size: 18px; }
  .ev-list li { grid-template-columns: 22px 1fr; row-gap: 6px; }
  .ev-list .pill { grid-column: 2; justify-self: start; margin-top: 2px; }
  .dossier-foot { flex-wrap: wrap; gap: 6px 14px; }
  .art-stamp { display: none; }
  .stat-strip { padding: 22px 0 28px; }
  .stat dt { font-size: 18px; }
  .stat dd { font-size: 11.5px; }
  .answers { grid-template-columns: 1fr; }
  .recalc { grid-template-columns: 1fr; }
  .doc-grid { grid-template-columns: 1fr; }
  .limit-grid { grid-template-columns: 1fr; }
  .limit-mark { font-size: 24px; }
  .pull-quote { padding-left: 20px; }
  .pull-quote.center { padding-left: 0; }
  .chain-nav { font-size: 11px; gap: 10px; padding: 12px 16px; }
  .quick-card { padding: 18px 18px 6px; }
  .quick-case-head { font-size: 11px; flex-wrap: wrap; gap: 4px 12px; }
  .quick-table { font-size: 13px; }
  .quick-table thead th { font-size: 10.5px; }
  .quick-table .pill { font-size: 10.5px; padding: 2px 8px; }
  .quick-result { padding: 26px 22px; }
  .quick-strip { padding: 18px 20px; }
  .mini-grid { grid-template-columns: 1fr; }
  table.wide { min-width: 700px; }
  thead th, tbody td { padding: 11px 14px; }
  .table-hint {
    display: block;
    margin: -8px 2px 6px;
    font-size: 11px;
    letter-spacing: .04em;
    color: var(--muted-2);
    text-align: right;
  }
  .faq summary { font-size: 16px; gap: 14px; }
  .faq-body { padding-right: 8px; }
  .prompt-sample { padding: 20px; }
  .start-cta .btn { width: 100%; }
  .start-cta p { font-size: 12.5px; }
  .final { padding: 80px 0; }
  .m-break { display: block; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* anchor offset for sticky header */
section[id] { scroll-margin-top: 84px; }

/* Platform entry on the dark start section. */
.start-cta .platform-entry { color: #e7dcc4; text-decoration: underline; text-underline-offset: 4px; }
.start-cta .platform-entry:hover { color: #ffffff; }


/* ---------- 可复制开场白（#start 暗色区） ---------- */

.prompt-kit { margin-top: 22px; }

.prompt-kit-label {
  margin-bottom: 14px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--gold-2);
}

.prompt-kit-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.prompt-chip {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 4px 12px;
  padding: 15px 17px;
  border: 1px solid rgba(233, 227, 214, .16);
  border-radius: 12px;
  background: rgba(255, 255, 255, .03);
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: border-color .2s ease, background .2s ease, transform .2s ease;
}

.prompt-chip:hover {
  border-color: rgba(194, 160, 95, .55);
  background: rgba(255, 255, 255, .06);
  transform: translateY(-1px);
}

.prompt-chip:focus-visible {
  outline: 2px solid var(--gold-2);
  outline-offset: 2px;
}

.chip-case {
  font-size: 15px;
  font-weight: 600;
  color: #f2ece0;
}

.chip-goal {
  font-size: 13px;
  color: #a9b2c0;
}

.chip-copy {
  grid-row: 1 / span 2;
  grid-column: 2;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--gold-2);
  white-space: nowrap;
}

.prompt-chip.is-copied {
  border-color: rgba(194, 160, 95, .7);
  background: rgba(194, 160, 95, .12);
}

.prompt-chip.is-copied .chip-copy { color: #efe7d6; }

.prompt-kit-hint {
  margin-top: 12px;
  font-size: 12.5px;
  color: #7f8896;
}

@media (max-width: 900px) {
  .prompt-kit-row { grid-template-columns: 1fr; }
}


/* ---------- 内测群二维码（#start 暗色区） ---------- */

.group-join {
  display: flex;
  align-items: center;
  gap: 26px;
  margin-top: 34px;
  padding: 24px 26px;
  border: 1px solid rgba(233, 227, 214, .16);
  border-radius: 16px;
  background: rgba(255, 255, 255, .045);
}

.group-qr {
  flex: 0 0 auto;
  display: block;
  width: 168px;
  height: 168px;
  padding: 10px;
  background: #fff;
  border-radius: 12px;
}

.group-copy h3 {
  margin-bottom: 8px;
  font-size: 17px;
  color: #f2ece0;
}

.group-copy p {
  max-width: 52ch;
  font-size: 14px;
  color: #a9b2c0;
}

.group-copy .group-note {
  margin-top: 8px;
  font-size: 12.5px;
  color: #7f8896;
}

@media (max-width: 720px) {
  .group-join {
    flex-direction: column;
    align-items: flex-start;
    gap: 18px;
    padding: 20px;
  }
  .group-qr { width: 148px; height: 148px; }
}