:root {
  --bg: #eef7ff;
  --bg-soft: rgba(255, 255, 255, 0.72);
  --panel: rgba(255, 255, 255, 0.78);
  --panel-strong: rgba(245, 251, 255, 0.92);
  --panel-accent: rgba(223, 241, 255, 0.88);
  --line: rgba(120, 177, 220, 0.22);
  --line-strong: rgba(91, 160, 212, 0.38);
  --text: #16324a;
  --muted: #5f7c94;
  --accent: #57aee6;
  --accent-strong: #3494d7;
  --accent-soft: rgba(87, 174, 230, 0.14);
  --cyan: #85d8ff;
  --cyan-soft: rgba(133, 216, 255, 0.2);
  --shadow: 0 24px 70px rgba(94, 152, 203, 0.18);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(147, 212, 255, 0.34), transparent 24%),
    radial-gradient(circle at 85% 14%, rgba(172, 229, 255, 0.34), transparent 18%),
    linear-gradient(180deg, #f4fbff 0%, #edf7ff 48%, #eaf5ff 100%);
  min-height: 100vh;
  overflow-x: hidden;
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
}

body::before {
  background:
    linear-gradient(rgba(128, 195, 236, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(128, 195, 236, 0.08) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.55), transparent 88%);
}

body::after {
  background:
    radial-gradient(circle at 10% 100%, rgba(133, 216, 255, 0.16), transparent 22%),
    radial-gradient(circle at 100% 35%, rgba(87, 174, 230, 0.14), transparent 22%);
}

.page-shell {
  position: relative;
  overflow: hidden;
  width: min(1180px, calc(100% - 32px));
  margin: 22px auto;
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, 0.78);
  border-radius: 30px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.78), rgba(244, 250, 255, 0.86)),
    var(--bg-soft);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.bg-orb,
.bg-grid {
  position: absolute;
  pointer-events: none;
}

.bg-orb {
  border-radius: 999px;
  filter: blur(10px);
}

.bg-orb-one {
  top: -50px;
  right: -70px;
  width: 240px;
  height: 240px;
  background: radial-gradient(circle, rgba(133, 216, 255, 0.36), transparent 70%);
}

.bg-orb-two {
  bottom: 140px;
  left: -70px;
  width: 220px;
  height: 220px;
  background: radial-gradient(circle, rgba(87, 174, 230, 0.16), transparent 72%);
}

.bg-grid {
  inset: 0;
  background:
    linear-gradient(rgba(128, 195, 236, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(128, 195, 236, 0.06) 1px, transparent 1px);
  background-size: 110px 110px;
  mask-image: radial-gradient(circle at 50% 18%, black 0%, transparent 85%);
}

.topbar,
.hero-grid,
.intro-grid,
.method-grid,
.writing-grid {
  display: grid;
  gap: 24px;
}

.topbar {
  position: relative;
  z-index: 1;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: center;
  margin-bottom: 40px;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.6);
  box-shadow: 0 10px 30px rgba(120, 177, 220, 0.08);
}

.brand,
.nav-links {
  display: flex;
  align-items: center;
}

.brand {
  gap: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand-dot {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--cyan), var(--accent-strong));
  box-shadow: 0 0 0 7px rgba(133, 216, 255, 0.22);
}

.nav-links {
  justify-content: flex-end;
  gap: 10px;
  flex-wrap: wrap;
}

.nav-links a,
.button {
  text-decoration: none;
}

.nav-links a {
  padding: 10px 14px;
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--muted);
  font-weight: 600;
  transition: all 0.25s ease;
}

.nav-links a:hover {
  color: var(--text);
  border-color: var(--line);
  background: rgba(87, 174, 230, 0.08);
}

.hero-grid {
  position: relative;
  z-index: 1;
  grid-template-columns: 1.35fr 0.95fr;
  align-items: stretch;
  gap: 28px;
}

.hero-copy,
.hero-card,
.project-card,
.timeline-content,
.writing-card,
.intro-grid article,
.method-grid article {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 24px;
  transition: transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease;
}

.hero-copy,
.project-card,
.timeline-content,
.writing-card,
.intro-grid article,
.method-grid article {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.88), rgba(242, 249, 255, 0.92));
}

.hero-copy::before,
.project-card::before,
.timeline-content::before,
.writing-card::before,
.intro-grid article::before,
.method-grid article::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(133, 216, 255, 0.12), transparent 34%, transparent 72%, rgba(87, 174, 230, 0.08));
  pointer-events: none;
}

.hero-copy:hover,
.hero-card:hover,
.project-card:hover,
.timeline-content:hover,
.writing-card:hover,
.intro-grid article:hover,
.method-grid article:hover {
  transform: translateY(-4px);
  border-color: rgba(91, 160, 212, 0.32);
  box-shadow: 0 18px 40px rgba(120, 177, 220, 0.14);
}

.hero-copy {
  padding: 34px;
}

.eyebrow {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--accent);
  font-weight: 800;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 40px;
  padding: 0 14px;
  margin-bottom: 18px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: rgba(133, 216, 255, 0.16);
  color: var(--accent-strong);
  font-size: 0.92rem;
  font-weight: 700;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--accent);
}

h1,
h2,
h3,
p,
ul {
  position: relative;
  margin-top: 0;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4.9rem);
  line-height: 1.02;
  letter-spacing: -0.05em;
  margin-bottom: 20px;
  max-width: 12ch;
}

h2 {
  font-size: clamp(1.95rem, 3vw, 3rem);
  line-height: 1.08;
  margin-bottom: 12px;
}

h3 {
  font-size: 1.16rem;
  margin-bottom: 10px;
}

.hero-text,
.section-subtitle,
.project-card p,
.timeline-content p,
.writing-card p,
.intro-grid p,
.method-grid p {
  color: var(--muted);
  line-height: 1.8;
}

.hero-actions {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 28px 0 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 700;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  background: linear-gradient(135deg, #7fd7ff, #57aee6 55%, #3d95d9);
  color: #ffffff;
  box-shadow: 0 12px 28px rgba(87, 174, 230, 0.22);
}

.button-secondary {
  border: 1px solid var(--line-strong);
  color: var(--accent-strong);
  background: rgba(255, 255, 255, 0.72);
}

.hero-metrics {
  position: relative;
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.hero-metrics li {
  padding: 18px 16px;
  border: 1px solid rgba(120, 177, 220, 0.18);
  border-radius: 20px;
  background: rgba(236, 247, 255, 0.88);
}

.hero-metrics strong,
.info-list strong,
.project-tag,
.timeline-date,
.method-grid span {
  display: block;
}

.hero-metrics strong {
  margin-bottom: 8px;
}

.hero-metrics span,
.info-list span,
.project-period {
  color: var(--muted);
  font-size: 0.95rem;
}

.hero-card {
  padding: 32px;
  color: var(--text);
  background:
    radial-gradient(circle at top right, rgba(133, 216, 255, 0.2), transparent 36%),
    linear-gradient(180deg, rgba(244, 251, 255, 0.94), rgba(234, 245, 255, 0.94));
}

.hero-badges {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0 22px;
}

.hero-badges span {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid rgba(91, 160, 212, 0.22);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.64);
  color: var(--accent-strong);
  font-size: 0.88rem;
  font-weight: 700;
}

.card-glow {
  position: absolute;
  inset: auto -40px -90px auto;
  width: 240px;
  height: 240px;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(133, 216, 255, 0.36), transparent 70%);
}

.card-grid {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(128, 195, 236, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(128, 195, 236, 0.07) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: 0.55;
  mask-image: radial-gradient(circle at 80% 20%, black 0%, transparent 70%);
}

.card-label {
  position: relative;
  margin-bottom: 14px;
  color: var(--accent);
  font-weight: 700;
}

.info-list {
  position: relative;
  display: grid;
  gap: 18px;
  margin-top: 26px;
}

.info-list div {
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(120, 177, 220, 0.16);
}

.info-list strong {
  margin-top: 6px;
  font-size: 1.05rem;
}

.mini-metrics {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 22px;
}

.mini-metrics article {
  padding: 16px;
  border: 1px solid rgba(120, 177, 220, 0.18);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.58);
}

.mini-metrics strong {
  display: block;
  margin-bottom: 6px;
  font-size: 1.25rem;
}

.mini-metrics span {
  color: var(--muted);
  font-size: 0.92rem;
}

.section {
  position: relative;
  z-index: 1;
  padding: 64px 8px 8px;
}

.section-heading {
  margin-bottom: 28px;
}

.section-heading h2 {
  margin-bottom: 10px;
}

.section-subtitle {
  max-width: 760px;
}

.intro-grid,
.writing-grid,
.method-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.intro-grid article,
.method-grid article,
.writing-card {
  padding: 24px;
}

.project-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.project-card {
  padding: 28px;
}

.project-case {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 24px;
  align-items: start;
}

.project-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.project-tag {
  width: fit-content;
  padding: 8px 12px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 0.88rem;
  font-weight: 700;
}

.project-side {
  position: relative;
  display: grid;
  align-content: start;
  gap: 12px;
  padding-right: 8px;
}

.case-index {
  color: var(--accent-strong);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  font-weight: 800;
}

.project-body {
  position: relative;
}

.project-body h3 {
  max-width: 18ch;
  margin-bottom: 12px;
  font-size: clamp(1.4rem, 2.3vw, 2rem);
  line-height: 1.2;
}

.project-summary {
  margin-bottom: 18px;
  max-width: 70ch;
  font-size: 1.01rem;
}

.case-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.project-link-row {
  position: relative;
  margin-top: 18px;
}

.case-block {
  position: relative;
  min-height: 100%;
  padding: 18px;
  border: 1px solid rgba(91, 160, 212, 0.14);
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.74), rgba(236, 247, 255, 0.86));
}

.case-block span {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--accent-strong);
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  font-weight: 800;
}

.case-block p {
  margin-bottom: 0;
}

.project-showcase {
  margin-top: 28px;
  padding: 26px;
  border: 1px solid rgba(91, 160, 212, 0.16);
  border-radius: 26px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.74), rgba(236, 247, 255, 0.84));
}

.showcase-head h3 {
  margin: 0 0 10px;
  font-size: 1.5rem;
}

.showcase-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.showcase-card {
  display: grid;
  gap: 12px;
  padding: 22px;
  border: 1px solid rgba(91, 160, 212, 0.16);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.8);
  box-shadow: 0 10px 28px rgba(120, 177, 220, 0.08);
}

.showcase-status {
  display: inline-flex;
  width: fit-content;
  min-height: 30px;
  align-items: center;
  padding: 0 10px;
  border-radius: 999px;
  background: rgba(87, 174, 230, 0.12);
  color: var(--accent-strong);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.06em;
}

.showcase-card h4 {
  margin: 0;
  font-size: 1.22rem;
  line-height: 1.3;
}

.showcase-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.showcase-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.showcase-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.showcase-tags span {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 10px;
  border: 1px solid rgba(91, 160, 212, 0.16);
  border-radius: 999px;
  background: #fff;
  color: #46627a;
  font-size: 0.82rem;
  font-weight: 700;
}

.showcase-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: fit-content;
  min-height: 44px;
  padding: 0 16px;
  border-radius: 14px;
  background: linear-gradient(135deg, #7fd7ff, #57aee6 55%, #3d95d9);
  color: #fff;
  font-weight: 800;
  text-decoration: none;
  box-shadow: 0 12px 24px rgba(87, 174, 230, 0.18);
}

.showcase-link:hover {
  transform: translateY(-2px);
}

.project-highlight {
  position: relative;
  display: grid;
  gap: 4px;
  margin-bottom: 16px;
  padding: 14px 16px;
  border: 1px solid rgba(91, 160, 212, 0.16);
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(133, 216, 255, 0.16), rgba(255, 255, 255, 0.66));
}

.project-highlight strong {
  font-size: 1.65rem;
  line-height: 1;
  color: var(--accent-strong);
}

.project-highlight span {
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 600;
}

.timeline {
  display: grid;
  gap: 18px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 180px 1fr;
  align-items: start;
  gap: 18px;
}

.timeline-date {
  padding-top: 18px;
  color: var(--accent-strong);
  font-weight: 800;
  letter-spacing: 0.02em;
}

.timeline-content {
  padding: 22px 24px;
}

.timeline-content h3 {
  margin-bottom: 8px;
}

.method-grid span {
  margin-bottom: 18px;
  font-size: 2.1rem;
  line-height: 1;
  color: var(--accent);
  font-weight: 800;
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 980px) {
  .page-shell {
    width: min(100% - 24px, 1180px);
    padding: 24px;
  }

  .hero-grid,
  .intro-grid,
  .method-grid,
  .writing-grid,
  .timeline-item {
    grid-template-columns: 1fr;
  }

  .project-case,
  .case-grid,
  .showcase-grid {
    grid-template-columns: 1fr;
  }

  .project-case {
    gap: 18px;
  }

  .project-side {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px 12px;
    padding-right: 0;
  }

  .project-highlight {
    width: min(240px, 100%);
    margin-bottom: 0;
  }

  .hero-metrics {
    grid-template-columns: 1fr;
  }

  .mini-metrics {
    grid-template-columns: 1fr 1fr;
  }

  .timeline-date {
    padding-top: 0;
  }

  .section {
    padding: 52px 0 0;
  }

  .project-body h3,
  .project-summary {
    max-width: none;
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: calc(100% - 12px);
    margin: 12px auto;
    padding: 14px;
    border-radius: 18px;
  }

  .topbar {
    grid-template-columns: 1fr;
    gap: 12px;
    margin-bottom: 24px;
    padding: 12px;
  }

  .nav-links {
    justify-content: flex-start;
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: max-content;
    overflow-x: auto;
    padding-bottom: 4px;
    gap: 8px;
    scrollbar-width: none;
  }

  .nav-links::-webkit-scrollbar {
    display: none;
  }

  .nav-links a {
    white-space: nowrap;
    padding: 9px 12px;
  }

  h1 {
    max-width: none;
  }

  .section {
    padding: 40px 0 0;
  }

  .project-card {
    padding: 18px;
  }

  .mini-metrics {
    grid-template-columns: 1fr;
  }

  .hero-copy,
  .hero-card {
    padding: 20px;
  }

  .intro-grid article,
  .method-grid article,
  .writing-card,
  .timeline-content,
  .showcase-card,
  .project-showcase {
    padding: 18px;
  }

  .hero-grid {
    gap: 18px;
  }

  .hero-actions {
    margin: 22px 0 24px;
  }

  .button,
  .showcase-link {
    width: 100%;
  }

  .hero-metrics {
    gap: 10px;
  }

  .project-body h3 {
    font-size: 1.5rem;
  }

  .project-summary,
  .section-subtitle,
  .hero-text {
    font-size: 0.98rem;
  }

  .case-block {
    padding: 16px;
  }

  .timeline-content {
    padding: 18px;
  }

  .showcase-card h4 {
    font-size: 1.1rem;
  }
}

@media (max-width: 560px) {
  .brand {
    font-size: 0.95rem;
  }

  h1 {
    font-size: clamp(2rem, 11vw, 2.8rem);
    line-height: 1.06;
  }

  h2 {
    font-size: 1.7rem;
    line-height: 1.12;
  }

  .hero-copy,
  .hero-card,
  .project-card,
  .showcase-card,
  .intro-grid article,
  .method-grid article,
  .writing-card,
  .timeline-content {
    border-radius: 20px;
  }

  .hero-metrics li {
    padding: 15px 14px;
  }

  .project-highlight strong {
    font-size: 1.45rem;
  }
}