:root {
  color-scheme: light;
  --ink: #102532;
  --ink-soft: #324b59;
  --rail: #123247;
  --rail-soft: #9cb1bd;
  --paper: #e8eef0;
  --card: #f9fbfa;
  --white: #ffffff;
  --line: #c8d3d8;
  --line-dark: #315165;
  --signal: #d8652f;
  --signal-soft: #f3d6c5;
  --ok: #316b57;
  --display: "Songti SC", "STSong", "Noto Serif SC", Georgia, serif;
  --body: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --utility: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  grid-template-columns: 272px minmax(0, 1fr);
  grid-template-rows: 1fr auto;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  line-height: 1.7;
}

a, button, input { -webkit-tap-highlight-color: transparent; }
a:focus-visible, button:focus-visible, input:focus-visible, summary:focus-visible {
  outline: 3px solid var(--signal);
  outline-offset: 4px;
}

.site-rail {
  position: sticky;
  top: 0;
  grid-row: 1 / -1;
  min-height: 100vh;
  align-self: start;
  display: flex;
  flex-direction: column;
  padding: 32px 24px 28px;
  background: var(--rail);
  color: var(--white);
  overflow: hidden;
}
.site-rail::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: 13%;
  width: 180px;
  height: 180px;
  border: 1px solid var(--line-dark);
  border-radius: 50%;
  box-shadow: 0 0 0 28px rgba(255,255,255,.025), 0 0 0 56px rgba(255,255,255,.018);
  pointer-events: none;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--white);
  text-decoration: none;
}
.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  border: 1px solid rgba(255,255,255,.65);
  border-radius: 50%;
  font: 700 1.15rem var(--display);
}
.brand strong { display: block; font: 700 1.03rem var(--display); letter-spacing: .08em; }
.brand small { display: block; margin-top: 3px; color: var(--rail-soft); font: .58rem var(--utility); letter-spacing: .12em; }

nav { display: grid; gap: 2px; margin: 86px -8px 0; }
nav a {
  position: relative;
  display: flex;
  align-items: center;
  gap: 18px;
  min-height: 48px;
  padding: 0 14px;
  border-radius: 3px;
  color: var(--rail-soft);
  text-decoration: none;
  font-weight: 650;
  transition: color .2s ease, background .2s ease, transform .2s ease;
}
nav a span { font: .66rem var(--utility); opacity: .72; }
nav a:hover { color: var(--white); background: rgba(255,255,255,.06); transform: translateX(3px); }
nav a.active { color: var(--white); background: rgba(255,255,255,.09); }
nav a.active::before { content: ""; position: absolute; left: -16px; width: 3px; height: 24px; background: var(--signal); }

.rail-foot { position: relative; z-index: 1; margin-top: auto; color: var(--rail-soft); font-size: .74rem; }
.rail-foot p { display: flex; align-items: center; gap: 8px; }
.rail-foot i { width: 7px; height: 7px; border-radius: 50%; background: #63c39c; box-shadow: 0 0 0 4px rgba(99,195,156,.12); }
.rail-foot form { margin-top: 16px; }
.link-button { border: 0; padding: 0; background: none; color: var(--rail-soft); font: inherit; text-decoration: underline; text-underline-offset: 4px; cursor: pointer; }
.link-button:hover { color: var(--white); }
.rail-intro { margin: auto 0 14vh; color: var(--rail-soft); font: 1.1rem/1.9 var(--display); letter-spacing: .04em; }

main { width: min(1120px, 100%); min-height: calc(100vh - 80px); padding: clamp(40px, 6vw, 88px) clamp(24px, 6vw, 80px) 96px; }
footer {
  grid-column: 2;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 24px clamp(24px, 6vw, 80px);
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font: .68rem var(--utility);
  letter-spacing: .06em;
}

h1, h2, h3 { font-family: var(--display); line-height: 1.15; }
h1 { margin: .12em 0; font-size: clamp(2.7rem, 6vw, 5.6rem); font-weight: 700; letter-spacing: -.045em; }
h2 { margin: .2em 0; font-size: clamp(1.7rem, 3vw, 2.8rem); }
p { margin-top: 0; }
.eyebrow, .section-label { color: var(--signal); font: 700 .72rem var(--utility); letter-spacing: .16em; text-transform: uppercase; }
.lead { max-width: 650px; margin: 22px 0 0; color: var(--ink-soft); font-size: clamp(1rem, 1.5vw, 1.13rem); }
.date { margin: 3px 0 0; color: var(--ink-soft); font: .8rem var(--utility); letter-spacing: .08em; }

button {
  min-height: 46px;
  border: 0;
  border-radius: 3px;
  padding: 12px 20px;
  background: var(--ink);
  color: var(--white);
  font: 700 .92rem var(--body);
  cursor: pointer;
  transition: background .2s ease, transform .2s ease, box-shadow .2s ease;
}
button:hover { background: var(--signal); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(16,37,50,.16); }
button:disabled { cursor: wait; opacity: .58; transform: none; }
input {
  width: 100%;
  min-height: 50px;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: var(--white);
  color: var(--ink);
  padding: 11px 13px;
  font: inherit;
}
input:hover, input:focus { border-color: var(--ink-soft); }

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 40px;
  align-items: end;
  padding-bottom: 64px;
  border-bottom: 1px solid var(--line);
}
.hero-copy { max-width: 760px; }
.hero-action { display: grid; gap: 8px; justify-items: end; padding-bottom: 12px; }
.hero-action button { display: flex; align-items: center; gap: 10px; }
.hero-action button span { font-size: 1.2rem; }
.hero-action small { color: var(--ink-soft); font-size: .72rem; }
.signal-track {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -7px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--ink-soft);
}
.signal-track::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 22%;
  height: 2px;
  background: var(--signal);
  animation: signal-scan 4.8s ease-in-out infinite alternate;
}
.signal-track span { position: relative; padding-top: 14px; color: var(--ink-soft); font: .66rem var(--utility); letter-spacing: .12em; }
.signal-track span::before { content: ""; position: absolute; top: -4px; left: 0; width: 7px; height: 7px; border-radius: 50%; background: var(--paper); border: 1px solid var(--ink-soft); }
@keyframes signal-scan { from { transform: translateX(0); } to { transform: translateX(355%); } }

.report-card, .empty, .notification-panel, .analysis-form, .login-card {
  background: var(--card);
  border: 1px solid var(--line);
  box-shadow: 0 18px 50px rgba(35,57,69,.07);
}
.report-card { margin-top: 64px; padding: clamp(26px, 5vw, 60px); }
.featured-report { position: relative; overflow: hidden; }
.featured-report::before { content: ""; position: absolute; top: 0; bottom: 0; left: 0; width: 4px; background: var(--signal); }
.report-heading {
  display: grid;
  grid-template-columns: minmax(110px, .32fr) minmax(0, 1fr);
  gap: 28px;
  align-items: start;
  padding-bottom: 28px;
  margin-bottom: 34px;
  border-bottom: 1px solid var(--line);
}
.report-heading h2 { margin-top: 0; }
.report-content { max-width: 760px; white-space: pre-wrap; overflow-wrap: anywhere; font-family: var(--display); font-size: clamp(1rem, 1.4vw, 1.09rem); line-height: 2; }
.report-content::first-letter { font-size: 1.85em; font-weight: 700; color: var(--signal); }
.text-link { display: inline-flex; align-items: center; gap: 8px; margin-top: 34px; border-bottom: 1px solid var(--signal); color: var(--signal); font-weight: 750; text-decoration: none; }
.text-link:hover { color: var(--ink); border-color: var(--ink); }
.full { margin-top: 0; }
.detail-heading { position: relative; display: block; padding-bottom: 72px; }
.detail-heading h1 { max-width: 850px; margin-top: 22px; font-size: clamp(2.4rem, 5vw, 4.6rem); }
.detail-heading .signal-track { bottom: -7px; }

.page-title { display: grid; grid-template-columns: 130px minmax(0, 1fr) auto; gap: 28px; align-items: end; margin-bottom: 48px; padding-bottom: 40px; border-bottom: 1px solid var(--line); }
.page-title h1 { font-size: clamp(2.8rem, 5vw, 4.8rem); }
.page-title .lead { margin-top: 14px; }
.archive-count { display: grid; justify-items: end; margin: 0; color: var(--ink-soft); }
.archive-count strong { color: var(--signal); font: 3.4rem/1 var(--display); }
.archive-count span { font-size: .78rem; }

.list { border-top: 1px solid var(--ink); }
.list-row {
  display: grid;
  grid-template-columns: 44px 128px minmax(0, 1fr) auto;
  gap: 18px;
  align-items: center;
  min-height: 76px;
  padding: 14px 5px;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  text-decoration: none;
}
a.list-row { transition: background .2s ease, padding .2s ease; }
a.list-row:hover { padding-left: 14px; padding-right: 14px; background: rgba(255,255,255,.5); }
.item-index { color: var(--signal); font: .68rem var(--utility); }
.list-row time { color: var(--ink-soft); font: .75rem var(--utility); }
.list-row strong { font-family: var(--display); font-size: 1.08rem; }
.row-arrow { font-size: 1.05rem; }

.analysis-form { display: grid; grid-template-columns: 1fr auto 1fr auto; gap: 18px; align-items: end; padding: clamp(24px, 4vw, 40px); }
.analysis-form label { display: grid; gap: 8px; color: var(--ink-soft); font-size: .84rem; font-weight: 700; }
.analysis-form > p { grid-column: 1 / -1; margin: 0; color: var(--ink-soft); font-size: .78rem; }
.range-arrow { padding-bottom: 12px; color: var(--signal); font-size: 1.3rem; }
.recent-block { margin-top: 72px; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 20px; }
.analysis-row { grid-template-columns: 44px minmax(0, 1fr) auto; }

.notification-panel { display: grid; grid-template-columns: 1.1fr .9fr; gap: 54px; padding: clamp(28px, 5vw, 56px); }
.notification-copy h2 { margin: 10px 0 22px; }
.notification-copy p:last-child { color: var(--ink-soft); }
.steps { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.steps li { display: flex; align-items: center; gap: 14px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.steps span { display: grid; place-items: center; width: 27px; height: 27px; flex: 0 0 auto; border: 1px solid var(--signal); border-radius: 50%; color: var(--signal); font: .68rem var(--utility); }
.notification-action { grid-column: 1 / -1; display: flex; align-items: center; gap: 18px; padding-top: 8px; }
.notification-action .notice { margin: 0; }

.login-layout { min-height: calc(100vh - 176px); display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(360px, .72fr); gap: clamp(40px, 8vw, 110px); align-items: center; }
.login-intro { position: relative; padding-bottom: 70px; }
.login-intro h1 { font-size: clamp(3rem, 5vw, 4.8rem); white-space: nowrap; }
.login-card { padding: clamp(28px, 4vw, 44px); }
.login-card h2 { font-size: 2rem; }
.login-card > p:not(.section-label):not(.error) { color: var(--ink-soft); }
.stack { display: grid; gap: 12px; margin-top: 28px; }
.stack label { color: var(--ink-soft); font-size: .84rem; font-weight: 700; }
.stack button { display: flex; justify-content: space-between; align-items: center; margin-top: 6px; }

.notice, .error { padding: 13px 16px; border-left: 3px solid; }
.notice { margin: 28px 0 0; background: #d9e8e3; border-color: var(--ok); color: #224c3d; }
.error { background: #f4ddd2; border-color: #a83e25; color: #792d1c; }
.empty { margin-top: 64px; padding: clamp(28px, 5vw, 52px); }
.empty p:last-child { color: var(--ink-soft); }

details { margin-top: 54px; padding-top: 22px; border-top: 1px solid var(--line); }
summary { display: flex; justify-content: space-between; gap: 20px; cursor: pointer; font-weight: 750; }
summary small { color: var(--ink-soft); font: .72rem var(--utility); }
.sources { margin: 26px 0 0; padding-left: 24px; }
.sources li { padding: 12px 0 12px 8px; border-bottom: 1px solid var(--line); }
.sources a { color: var(--ink); overflow-wrap: anywhere; font-family: var(--display); text-decoration-thickness: 1px; text-underline-offset: 4px; }
.sources small { display: block; margin-top: 3px; color: var(--ink-soft); font-size: .72rem; }

@media (max-width: 920px) {
  body { display: block; }
  .site-rail { position: sticky; z-index: 10; min-height: auto; height: auto; padding: 12px 18px 0; }
  .site-rail::after, .rail-intro { display: none; }
  .brand { padding-bottom: 10px; }
  .brand-mark { width: 34px; height: 34px; font-size: .95rem; }
  .brand strong { font-size: .94rem; }
  .brand small { display: none; }
  nav { display: flex; gap: 2px; margin: 0 -8px; overflow-x: auto; scrollbar-width: none; }
  nav::-webkit-scrollbar { display: none; }
  nav a { min-height: 42px; padding: 0 11px; font-size: .84rem; white-space: nowrap; }
  nav a span, nav a.active::before { display: none; }
  .rail-foot { position: absolute; right: 18px; top: 16px; }
  .rail-foot p { display: none; }
  .rail-foot form { margin: 0; }
  .link-button { font-size: .74rem; }
  main { min-height: calc(100vh - 170px); padding: 42px 20px 70px; }
  footer { display: flex; grid-column: auto; padding: 20px; }
  .login-layout { min-height: auto; grid-template-columns: 1fr; gap: 44px; }
}

@media (max-width: 680px) {
  h1 { font-size: clamp(2.6rem, 13vw, 4rem); }
  .hero { grid-template-columns: 1fr; gap: 28px; padding-bottom: 68px; }
  .hero-action { justify-items: stretch; padding: 0; }
  .hero-action small { text-align: right; }
  .signal-track span { font-size: .6rem; }
  .report-card { margin-top: 46px; padding: 28px 20px; }
  .report-heading { grid-template-columns: 1fr; gap: 14px; }
  .detail-heading { padding-bottom: 68px; }
  .page-title { grid-template-columns: 1fr auto; gap: 14px; padding-bottom: 28px; }
  .page-title .eyebrow { grid-column: 1 / -1; }
  .page-title .lead { font-size: .98rem; }
  .archive-count strong { font-size: 2.5rem; }
  .list-row { grid-template-columns: 36px 1fr auto; gap: 10px; }
  .archive-list .list-row time { grid-column: 2; }
  .archive-list .list-row strong { grid-column: 2; }
  .archive-list .row-arrow { grid-column: 3; grid-row: 1 / 3; }
  .analysis-form { grid-template-columns: 1fr; }
  .range-arrow { display: none; }
  .analysis-row { grid-template-columns: 32px 1fr; }
  .analysis-row time { grid-column: 2; }
  .notification-panel { grid-template-columns: 1fr; gap: 28px; padding: 28px 20px; }
  .notification-action { grid-column: auto; align-items: stretch; flex-direction: column; }
  .login-intro { padding-bottom: 58px; }
  .login-intro h1 { font-size: clamp(3rem, 12.5vw, 4rem); }
  footer { flex-direction: column; gap: 8px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}