:root {
  --bg: #f7f8f5;
  --paper: #ffffff;
  --text: #222824;
  --muted: #5f6962;
  --line: #dfe4dc;
  --soft: #eef3ec;
  --accent: #2f6f62;
  --accent-weak: #dcebe6;
  --ink: #1f2f2b;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.78;
}

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 111, 98, 0.35);
}

a:hover {
  border-bottom-color: var(--accent);
}

.page {
  max-width: 1080px;
  margin: 0 auto;
  padding: 32px 24px 56px;
}

.document {
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 42px 52px 56px;
}

.topline {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  color: var(--muted);
  font-size: 14px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 16px;
  margin-bottom: 34px;
}

.breadcrumb {
  color: var(--muted);
}

.breadcrumb a {
  color: var(--muted);
  border-bottom-color: transparent;
}

h1,
h2,
h3 {
  color: var(--ink);
  line-height: 1.35;
  letter-spacing: 0;
}

h1 {
  font-size: 34px;
  margin: 0 0 14px;
  font-weight: 700;
}

h2 {
  font-size: 24px;
  margin: 42px 0 16px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
}

h3 {
  font-size: 19px;
  margin: 26px 0 10px;
}

p {
  margin: 0 0 14px;
}

ul,
ol {
  padding-left: 1.25em;
  margin: 8px 0 18px;
}

li {
  margin: 4px 0;
}

.lead {
  font-size: 19px;
  color: #33413b;
  line-height: 1.75;
  margin-bottom: 22px;
}

.article-home {
  max-width: 900px;
}

.article-home h2 {
  border-top: 0;
  padding-top: 0;
  margin-top: 44px;
}

.article-home p {
  text-align: justify;
}

.article-home .read-more {
  text-align: left;
  margin: 18px 0 30px;
}

.article-home .read-more a {
  font-weight: 700;
}

.project-chapter {
  margin: 52px -10px 0;
  padding: 30px 10px 8px 24px;
  border-top: 2px solid #d5ddd7;
  border-left: 5px solid #2f6f63;
  background: linear-gradient(90deg, #f8faf7 0, #fff 46%);
}

.project-chapter-primary {
  border-left-color: #2f6f63;
}

.project-chapter-secondary {
  border-left-color: #4f6f8f;
}

.project-chapter-tertiary {
  border-left-color: #7a6d45;
}

.project-number {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 15px;
  font-weight: 700;
  text-align: left;
}

.article-home .project-title {
  margin: 0;
  padding: 0;
  border: 0;
  font-size: 34px;
  line-height: 1.25;
  color: #0e2724;
}

.project-subtitle {
  margin: 8px 0 22px;
  color: #52615d;
  font-size: 20px;
  font-weight: 700;
  text-align: left;
}

.article-home .project-detail-entry {
  margin: 24px 0 32px;
}

.article-home .project-detail-entry a {
  display: inline-block;
  padding: 10px 16px;
  border: 1px solid #2f6f63;
  background: #eaf3ef;
  color: #184d43;
  text-decoration: none;
}

.article-home .project-detail-entry a:hover {
  background: #dcece6;
}

.article-home p strong {
  color: #163d36;
  font-weight: 700;
}

.article-home h3 {
  margin-top: 30px;
}

.article-figure {
  margin: 24px 0 26px;
}

.article-figure img {
  display: block;
  width: 100%;
  max-width: 680px;
  height: auto;
}

.note {
  color: var(--muted);
  font-size: 14px;
}

.summary-box {
  background: var(--soft);
  border-left: 4px solid var(--accent);
  padding: 18px 20px;
  margin: 24px 0;
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 22px 0 30px;
}

.stats-2col {
  grid-template-columns: repeat(2, 1fr);
}

.stat {
  border: 1px solid var(--line);
  background: #fbfcfa;
  padding: 16px;
  min-height: 116px;
}

.stat strong {
  display: block;
  font-size: 25px;
  line-height: 1.25;
  color: var(--accent);
  margin-bottom: 8px;
}

.stat span {
  display: block;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.project-list {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.project-item {
  border: 1px solid var(--line);
  padding: 20px 22px;
  background: #fff;
}

.project-item h3 {
  margin-top: 0;
}

.tagline {
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 8px;
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.plain-card {
  background: #fbfcfa;
  border: 1px solid var(--line);
  padding: 18px 20px;
}

.plain-card h3 {
  margin-top: 0;
}

.flow {
  display: grid;
  gap: 8px;
  margin: 20px 0;
}

.flow div {
  border-left: 3px solid var(--accent);
  background: #fbfcfa;
  padding: 10px 14px;
}

.case-list {
  counter-reset: case;
  display: grid;
  gap: 14px;
  margin: 20px 0;
}

.case {
  counter-increment: case;
  border: 1px solid var(--line);
  padding: 18px 20px 18px 54px;
  position: relative;
  background: #fff;
}

.case::before {
  content: counter(case);
  position: absolute;
  left: 18px;
  top: 19px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--accent-weak);
  color: var(--accent);
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 14px;
}

.case h3 {
  margin-top: 0;
}

.case .case-step {
  font-size: 15px;
}

.case.case-no-number::before {
  content: none;
}

.case.case-no-number {
  padding-left: 20px;
}

.case .site-entry {
  margin: 12px 0 0;
}

.case .site-entry a {
  display: inline-block;
  padding: 8px 16px;
  border: 1px solid #2f6f63;
  background: #eaf3ef;
  color: #184d43;
  font-weight: 700;
}

.case .site-entry a:hover {
  background: #dcece6;
}

.case-link {
  margin: 8px 0 0;
  text-align: left;
}

.case-link a {
  font-weight: 700;
}

.case-figure {
  margin: 12px auto;
  text-align: center;
}

.case-figure img {
  max-width: 100%;
  height: auto;
  display: inline-block;
}

.link-panel {
  border: 1px dashed #aeb9b1;
  background: #fbfcfa;
  padding: 18px 20px;
  margin-top: 22px;
}

.link-panel ul {
  margin-bottom: 0;
}

.placeholder {
  color: #7a817b;
  background: #f1f3ef;
  padding: 2px 7px;
  border-radius: 3px;
  font-size: 14px;
}

.footer-nav {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  border-top: 1px solid var(--line);
  margin-top: 44px;
  padding-top: 20px;
  color: var(--muted);
}

.quote {
  margin: 18px 0;
  padding: 12px 18px;
  border-left: 4px solid var(--line);
  color: #3d4640;
  background: #fbfcfa;
}

.source-pre {
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: anywhere;
  margin: 26px 0;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--text);
  font: inherit;
  line-height: 1.82;
}

.case-eyebrow {
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 6px;
  text-align: left;
}

.prompt-title,
.result-title {
  border-top: 1px solid var(--line);
  padding-top: 18px;
}

.prompt-title {
  color: #214f47;
}

.result-title {
  color: #173f38;
  font-size: 22px;
  margin-top: 0;
}

.result-box {
  margin: 26px 0 34px;
  padding: 24px 28px 28px;
  border: 1px solid #cbd8d2;
  border-left: 5px solid var(--accent);
  background: #fbfcfa;
}

.result-box h2 {
  border-top: 0;
  padding-top: 0;
}

.result-box h2:not(.result-title) {
  font-size: 20px;
  margin-top: 30px;
}

.result-box p {
  text-align: justify;
}

.compact-triad {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 18px 0 26px;
}

.compact-card {
  border: 1px solid var(--line);
  background: #fbfcfa;
  padding: 16px 18px;
}

.compact-card h3 {
  margin: 0 0 8px;
  font-size: 17px;
  color: #173f38;
}

.compact-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
}

.question-list {
  margin: 16px 0 18px;
  border-left: 4px solid var(--accent);
  background: #f7faf6;
  padding: 12px 18px;
}

.question-list p {
  margin: 8px 0;
  text-align: left;
}

.question-list span {
  color: var(--muted);
}

.process-line {
  border: 1px solid #cbd8d2;
  background: #f4f7f3;
  color: #173f38;
  padding: 14px 18px;
  font-weight: 700;
  text-align: left;
}

.compact-note {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 12px 0;
  color: #2d3a35;
}

.prompt-label,
.prompt-text {
  background: #f4f7f3;
  border-left: 4px solid var(--accent);
  padding: 12px 16px;
  margin-bottom: 0;
  text-align: left;
}

.prompt-text + .prompt-text {
  padding-top: 0;
}

.prompt-pre {
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: anywhere;
  margin: 12px 0 26px;
  padding: 18px 20px;
  border: 1px solid #c7d7d1;
  border-left: 5px solid var(--accent);
  background: #f3f7f5;
  color: #183b34;
  font-family: Consolas, "Microsoft YaHei", "PingFang SC", monospace;
  font-size: 15px;
  line-height: 1.8;
}

.prompt-examples {
  margin: 18px 0 24px;
  border-left: 4px solid var(--accent);
  background: #f4f7f3;
  padding: 12px 18px;
}

.prompt-examples p {
  margin: 9px 0;
  color: #183b34;
  text-align: left;
}

.use-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin: 18px 0 28px;
}

.use-card {
  border: 1px solid var(--line);
  background: #fbfcfa;
  padding: 18px 20px;
}

.use-card h3 {
  margin: 0 0 8px;
  font-size: 18px;
  color: #173f38;
}

.use-card p {
  margin-bottom: 12px;
  font-size: 15px;
}

.small-button {
  display: inline-block;
  margin: 4px 8px 0 0;
  padding: 5px 10px;
  border: 1px solid #b9cbc5;
  background: #eef5f2;
  color: #1d554b;
  font-size: 14px;
  font-weight: 700;
}

.anchor-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0 32px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.anchor-nav a {
  padding: 5px 10px;
  border: 1px solid var(--line);
  background: #fbfcfa;
  color: #1d554b;
  font-size: 14px;
}

.prompt-section {
  margin-top: 36px;
}

.prompt-section h2 {
  margin-bottom: 8px;
}

.access-panel {
  border: 1px solid var(--line);
  background: #fbfcfa;
  padding: 24px 26px 30px;
  margin: 24px 0 34px;
  max-width: 720px;
}

.access-panel h2 {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
  font-size: 24px;
}

.access-panel figure {
  margin: 20px auto 0;
  max-width: 230px;
}

.access-panel img {
  display: block;
  width: 100%;
  height: auto;
}

.access-panel a {
  overflow-wrap: anywhere;
  word-break: break-all;
}

.access-link {
  display: inline-block;
  margin: 4px 0 2px;
  font-weight: 700;
}

.subsection-title {
  font-size: 20px;
  margin-top: 28px;
}

.item-title {
  font-size: 17px;
  margin-top: 22px;
  color: #243b36;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 18px 0 24px;
  font-size: 15px;
}

th,
td {
  border: 1px solid var(--line);
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--soft);
  color: var(--ink);
}

@media (max-width: 760px) {
  .page {
    padding: 14px;
  }

  .document {
    padding: 26px 20px 34px;
  }

  .topline,
  .footer-nav,
  .two-col {
    display: block;
  }

  h1 {
    font-size: 27px;
  }

  h2 {
    font-size: 21px;
  }

  .lead {
    font-size: 17px;
  }

  .stats {
    grid-template-columns: 1fr;
  }

  .stats-2col {
    grid-template-columns: 1fr;
  }

  .compact-triad {
    grid-template-columns: 1fr;
  }

  .use-grid {
    grid-template-columns: 1fr;
  }

  .access-panel figure {
    max-width: 240px;
  }
}

/* 首页浮动定位标签：半透明竖排，点击平滑定位到三个项目章节 */
.project-float-nav {
  position: fixed;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
  z-index: 30;
}

.project-float-nav .pf-item {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 5px 12px 5px 6px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.07);
  color: var(--muted);
  font-size: 13px;
  line-height: 1;
  white-space: nowrap;
  text-decoration: none;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}

.project-float-nav .pf-item:hover,
.project-float-nav .pf-item.active {
  border-color: var(--accent);
  color: var(--accent);
  background: #fff;
}

.project-float-nav .pf-no {
  display: grid;
  place-items: center;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  font-size: 12px;
  font-weight: 700;
  flex: none;
}

.project-float-nav .pf-1 .pf-no {
  background: #dcebe6;
  color: #2f6f63;
}

.project-float-nav .pf-2 .pf-no {
  background: #e0e9f1;
  color: #4f6f8f;
}

.project-float-nav .pf-3 .pf-no {
  background: #f0eadb;
  color: #7a6d45;
}

/* 中等宽度屏幕：只保留三个小圆点，避免压到正文 */
@media (max-width: 1279px) and (min-width: 641px) {
  .project-float-nav {
    right: 10px;
  }

  .project-float-nav .pf-item {
    padding: 5px;
  }

  .project-float-nav .pf-text {
    display: none;
  }
}

/* 手机宽度：阅读为单列连续滚动，隐藏以免遮挡正文 */
@media (max-width: 640px) {
  .project-float-nav {
    display: none;
  }
}

@media print {
  body {
    background: #fff;
  }

  .project-float-nav {
    display: none;
  }

  .page {
    padding: 0;
  }

  .document {
    border: 0;
    padding: 0;
  }

  a {
    color: #000;
    border: 0;
  }
}