:root {
  --blue: #1c98d4;
  --blue-strong: #009edb;
  --ink: #2f3640;
  --muted: #666f7a;
  --soft: #f4f4f4;
  --line: #e6ebef;
  --dark: #101827;
  --sdg1: #e5243b;
  --green: #4c9f38;
  --yellow: #fbc412;
  --orange: #fd6925;
  --red: #dd1367;
  --teal: #26bde2;
  --purple: #a21942;
  --max: 1200px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.65;
  background: #fff;
}

a {
  color: inherit;
  text-decoration: none;
}

img,
video {
  max-width: 100%;
  display: block;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  height: 64px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
}

.nav {
  max-width: var(--max);
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 34px;
}

.logo {
  display: flex;
  align-items: center;
  min-width: 178px;
}

.logo img {
  width: 185px;
  height: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 30px;
  margin-left: auto;
  font-size: 16px;
  white-space: nowrap;
}

.nav-links a {
  position: relative;
  padding: 20px 0 18px;
}

.nav-links a.active {
  font-weight: 700;
}

.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 14px;
  height: 2px;
  background: var(--blue);
}

.nav-actions {
  display: flex;
  height: 64px;
  margin-left: 8px;
}

.nav-actions a {
  display: grid;
  place-items: center;
  min-width: 80px;
  padding: 0 18px;
  color: #fff;
}

.nav-actions .signup {
  background: var(--blue);
}

.nav-actions .signin {
  background: var(--dark);
}

.hero {
  min-height: 470px;
  color: #fff;
  background:
    linear-gradient(90deg, rgba(8, 29, 50, 0.82) 0%, rgba(8, 29, 50, 0.7) 46%, rgba(8, 29, 50, 0.18) 100%),
    url("./波克公益/封面/可持续原来这么简单把地球未来装进孩子的成长书包.jpg") center / cover;
}

.hero.sdg1 {
  background:
    linear-gradient(90deg, rgba(53, 10, 16, 0.84) 0%, rgba(53, 10, 16, 0.68) 48%, rgba(53, 10, 16, 0.18) 100%),
    url("./波克公益/封面/SDGHero小课堂SDG1无贫穷.jpg") center / cover;
}

.hero-inner {
  max-width: var(--max);
  min-height: 470px;
  margin: 0 auto;
  padding: 84px 24px 58px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.eyebrow {
  margin: 0 0 12px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 18px;
  font-weight: 700;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 820px;
  margin: 0;
  font-size: clamp(38px, 5vw, 64px);
  line-height: 1.12;
}

.hero-copy {
  max-width: 700px;
  margin: 22px 0 0;
  color: rgba(255, 255, 255, 0.9);
  font-size: 20px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.meta-pill {
  border: 1px solid rgba(255, 255, 255, 0.45);
  padding: 8px 14px;
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
  font-size: 14px;
}

.section {
  padding: 76px 24px;
}

.section.alt {
  background: var(--soft);
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
}

.section-kicker {
  margin: 0 0 4px;
  color: #999;
  font-size: 26px;
  font-weight: 700;
  text-transform: uppercase;
}

.section-title {
  margin: 0 0 34px;
  font-size: clamp(34px, 4vw, 48px);
  line-height: 1.2;
}

.intro-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 44px;
  align-items: start;
}

.lead {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 18px;
}

.partner-panel {
  border-left: 6px solid var(--blue);
  padding: 26px 28px;
  background: #fff;
}

.partner-panel strong {
  display: block;
  margin-bottom: 8px;
  font-size: 24px;
}

.partner-panel p {
  margin: 0;
  color: var(--muted);
}

.path {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin-top: 34px;
  border: 1px solid var(--line);
  background: var(--line);
}

.path-step {
  min-height: 132px;
  padding: 22px;
  background: #fff;
}

.path-step span {
  color: var(--blue);
  font-weight: 700;
}

.path-step h3 {
  margin: 8px 0 6px;
  font-size: 20px;
}

.path-step p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.goal-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.goal-card {
  min-height: 226px;
  border: 1px solid var(--line);
  padding: 18px 18px 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: #fff;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.goal-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 30px rgba(16, 24, 39, 0.1);
}

.goal-card.is-live {
  border-color: rgba(229, 36, 59, 0.36);
}

.goal-icon {
  width: 76px;
  height: 76px;
  object-fit: cover;
}

.goal-card h3 {
  margin: 18px 0 6px;
  font-size: 22px;
  line-height: 1.25;
}

.goal-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.goal-card .status {
  margin-top: 20px;
  color: var(--blue);
  font-size: 14px;
  font-weight: 700;
}

.goal-card.sdg1 .status {
  background: var(--sdg1);
  color: #fff;
}

.goal-card.sdg1 .status {
  display: inline-block;
  width: fit-content;
  padding: 4px 8px;
}

.feature {
  display: grid;
  grid-template-columns: 0.82fr 1fr;
  gap: 34px;
  align-items: center;
}

.feature img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: contain;
  background: #fff;
}

.feature-text h3 {
  margin: 0 0 14px;
  font-size: clamp(28px, 3vw, 38px);
  line-height: 1.24;
}

.feature-text p {
  margin: 0 0 24px;
  color: var(--muted);
  font-size: 18px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  color: #fff;
  background: var(--blue);
  font-weight: 700;
}

.button.dark {
  background: var(--dark);
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 780px) 320px;
  gap: 54px;
  align-items: start;
}

.article-body {
  font-size: 18px;
}

.article-body h2 {
  margin: 54px 0 16px;
  padding-left: 16px;
  border-left: 5px solid var(--sdg1);
  font-size: 32px;
  line-height: 1.28;
}

.article-body h3 {
  margin: 28px 0 10px;
  font-size: 20px;
  line-height: 1.38;
}

.article-body p {
  margin: 0 0 18px;
  color: #39424e;
}

.article-body ul {
  margin: 0 0 24px;
  padding-left: 22px;
}

.article-body li {
  margin: 8px 0;
}

.target-list {
  display: grid;
  gap: 12px;
  margin: 0 0 30px;
  padding: 0;
  list-style: none;
}

.target-list li {
  margin: 0;
  border-left: 4px solid var(--blue);
  padding: 14px 18px;
  background: #f7f9fb;
  color: #39424e;
}

.source-content {
  margin-top: 38px;
}

.source-content h3 {
  margin-top: 34px;
  font-size: 19px;
}

.source-content > h3:has(+ .article-list) {
  margin: 34px 0 0;
  border: 1px solid var(--line);
  border-left: 5px solid var(--article-accent, var(--sdg1));
  padding: 14px 18px;
  background: linear-gradient(90deg, color-mix(in srgb, var(--article-accent, var(--sdg1)) 8%, #fff) 0%, #f7f9fb 100%);
}

.source-content > h3 + .article-list {
  gap: 10px;
  border: 1px solid var(--line);
  border-top: 0;
  padding: 16px;
  background: #fff;
  box-shadow: 0 12px 30px rgba(17, 24, 39, 0.04);
}

.source-content .article-list li {
  border-left-color: var(--line);
  background: #fbfcfd;
  font-size: 17px;
  line-height: 1.72;
}

.source-content > p:last-child {
  margin: 34px 0 0;
  border-left: 0;
  padding: 24px 28px;
  color: #fff;
  background: var(--article-accent, var(--sdg1));
  font-size: 21px;
  font-weight: 700;
  line-height: 1.55;
}

.article-stat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 20px 0 38px;
}

.article-stat {
  position: relative;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--article-accent, var(--sdg1)) 28%, #fff);
  border-top: 5px solid var(--article-accent, var(--sdg1));
  padding: 20px;
  background: linear-gradient(160deg, #fff 0%, color-mix(in srgb, var(--article-accent, var(--sdg1)) 8%, #fff) 100%);
}

.article-stat::after {
  content: "";
  position: absolute;
  right: -26px;
  bottom: -30px;
  width: 90px;
  height: 90px;
  border: 18px solid color-mix(in srgb, var(--article-accent, var(--sdg1)) 10%, transparent);
  border-radius: 50%;
}

.article-stat strong {
  position: relative;
  z-index: 1;
  display: block;
  margin-bottom: 8px;
  color: var(--article-accent, var(--sdg1));
  font-size: 30px;
  line-height: 1;
}

.article-stat span {
  position: relative;
  z-index: 1;
  display: block;
  color: #39424e;
  font-size: 15px;
  line-height: 1.58;
}

.article-goal-group {
  margin: 18px 0 28px;
  border: 1px solid var(--line);
  background: #fff;
  box-shadow: 0 12px 30px rgba(17, 24, 39, 0.04);
}

.article-goal-group h3 {
  margin: 0;
  border-left: 5px solid var(--article-accent, var(--sdg1));
  padding: 15px 18px;
  background: linear-gradient(90deg, color-mix(in srgb, var(--article-accent, var(--sdg1)) 8%, #fff) 0%, #f7f9fb 100%);
  font-size: 19px;
  line-height: 1.35;
}

.article-goal-group .target-list {
  margin: 0;
  border: 0;
  box-shadow: none;
}

.article-action-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: 18px 0 30px;
}

.article-action-card {
  border: 1px solid var(--line);
  border-top: 4px solid var(--article-accent, var(--sdg1));
  padding: 18px;
  background: #fff;
}

.article-action-card h3 {
  margin: 0 0 12px;
  color: var(--article-accent, var(--sdg1));
  font-size: 19px;
  line-height: 1.35;
}

.article-action-card ul {
  margin: 0;
  padding-left: 18px;
}

.article-action-card li {
  margin: 8px 0;
}

.article-ending {
  display: grid;
  grid-template-columns: 86px 1fr;
  gap: 22px;
  align-items: center;
  margin: 38px 0 0;
  padding: 28px 30px;
  color: #fff;
  background: var(--article-accent, var(--sdg1));
}

.article-ending .mark {
  display: grid;
  place-items: center;
  width: 86px;
  height: 86px;
  border: 2px solid rgba(255, 255, 255, 0.6);
  font-size: 34px;
  font-weight: 800;
}

.article-ending p {
  margin: 0;
  color: #fff;
  font-size: 22px;
  font-weight: 700;
  line-height: 1.5;
}

.deep-content {
  margin-top: 34px;
}

.deep-content h3 {
  margin: 30px 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  color: var(--dark);
}

.quote-band {
  margin: 34px 0;
  padding: 26px 30px;
  color: #fff;
  background: var(--sdg1);
  font-size: 24px;
  font-weight: 700;
}

.media-block {
  margin: 0 0 34px;
  border: 1px solid var(--line);
  background: #fff;
}

.media-block video {
  width: 100%;
  background: #000;
}

.media-caption {
  padding: 12px 16px;
  color: var(--muted);
  font-size: 14px;
}

.article-figure {
  margin: 30px 0;
  border: 1px solid var(--line);
  background: #fff;
}

.article-figure img {
  width: 100%;
  height: auto;
  object-fit: contain;
}

.article-figure figcaption {
  padding: 12px 16px;
  color: var(--muted);
  font-size: 14px;
}

.article-figure.compact {
  max-width: 560px;
}

.insight-panel {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 0;
  margin: 30px 0;
  border: 1px solid var(--line);
  background: #fff;
}

.insight-media {
  min-height: 0;
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f7f9fb;
}

.insight-media img {
  width: 100%;
  height: auto;
  max-height: none;
  object-fit: contain;
  border: 1px solid var(--line);
  background: #fff;
}

.insight-copy {
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.insight-copy strong {
  display: block;
  margin-bottom: 10px;
  font-size: 20px;
  line-height: 1.35;
}

.insight-copy p {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.7;
}

.sdg-badge {
  display: flex;
  align-items: center;
  gap: 18px;
  margin: 30px 0;
  padding: 20px 24px;
  border: 1px solid rgba(229, 36, 59, 0.2);
  background: #fff;
}

.sdg-badge img {
  width: 92px;
  height: 92px;
  flex: 0 0 auto;
}

.sdg-badge strong {
  display: block;
  margin-bottom: 4px;
  font-size: 24px;
}

.sdg-badge p {
  margin: 0;
  color: var(--muted);
}

.image-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin: 28px 0;
}

.image-row img {
  width: 100%;
  height: auto;
  object-fit: contain;
  border: 1px solid var(--line);
  background: #fff;
}

.side-panel {
  position: sticky;
  top: 88px;
  border: 1px solid var(--line);
  background: #fff;
}

.side-panel h3 {
  margin: 0;
  padding: 18px 20px;
  color: #fff;
  background: var(--dark);
  font-size: 18px;
}

.side-icon {
  padding: 20px 20px 0;
}

.side-icon img {
  width: 96px;
  height: 96px;
}

.side-panel dl {
  margin: 0;
  padding: 20px;
}

.side-panel dt {
  margin-top: 16px;
  color: var(--muted);
  font-size: 14px;
}

.side-panel dt:first-child {
  margin-top: 0;
}

.side-panel dd {
  margin: 4px 0 0;
  font-weight: 700;
}

.relation-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 24px;
}

.relation-item {
  border-top: 4px solid var(--blue);
  padding: 18px;
  background: #fff;
}

.relation-item h3 {
  margin: 0 0 8px;
  font-size: 21px;
}

.relation-item p {
  margin: 0;
  color: var(--muted);
}

.article-nav {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  margin-top: 54px;
  border-top: 1px solid var(--line);
  padding-top: 24px;
}

.article-nav a {
  color: var(--blue);
  font-weight: 700;
}

.footer {
  color: #cbd5df;
  background: var(--dark);
}

.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 42px 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.footer strong {
  color: #fff;
}

.footer p {
  margin: 8px 0 0;
  color: #a9b4c1;
}

@media (max-width: 980px) {
  .nav {
    gap: 18px;
  }

  .nav-links {
    display: none;
  }

  .nav-actions {
    margin-left: auto;
  }

  .intro-grid,
  .feature,
  .article-layout,
  .footer-inner {
    grid-template-columns: 1fr;
  }

  .path,
  .goal-grid,
  .relation-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .side-panel {
    position: static;
  }
}

@media (max-width: 640px) {
  .site-header,
  .nav-actions {
    height: 58px;
  }

  .nav {
    padding: 0 16px;
  }

  .logo img {
    width: 154px;
  }

  .nav-actions a {
    min-width: 58px;
    padding: 0 10px;
    font-size: 14px;
  }

  .hero,
  .hero.sdg1,
  .hero-inner {
    min-height: 520px;
  }

  .hero-inner {
    padding: 74px 18px 44px;
  }

  .section {
    padding: 56px 18px;
  }

  .section-kicker {
    font-size: 21px;
  }

  .path,
  .goal-grid,
  .relation-list,
  .insight-panel,
  .image-row {
    grid-template-columns: 1fr;
  }

  .article-body h2 {
    font-size: 27px;
  }

  .quote-band {
    font-size: 21px;
  }

  .article-nav {
    flex-direction: column;
  }
}