:root {
  --bg: #14110e;
  --bg-elevated: #1c1814;
  --ink: #f3ebe1;
  --muted: #a89a8c;
  --line: rgba(243, 235, 225, 0.12);
  --ember: #e8a45a;
  --ember-deep: #c46b2d;
  --sage: #8fad8a;
  --radius: 18px;
  --font-display: "Instrument Serif", Georgia, serif;
  --font-body: "Manrope", "PingFang SC", "Microsoft YaHei", sans-serif;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--font-body);
  background:
    radial-gradient(1200px 700px at 15% -10%, rgba(232, 164, 90, 0.16), transparent 55%),
    radial-gradient(900px 600px at 90% 10%, rgba(143, 173, 138, 0.1), transparent 50%),
    linear-gradient(180deg, #1a1612 0%, var(--bg) 40%, #100e0c 100%);
  line-height: 1.6;
  overflow-x: hidden;
}

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

.grain {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 0;
  opacity: 0.08;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.glow {
  pointer-events: none;
  position: fixed;
  z-index: 0;
  width: 42vw;
  height: 42vw;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.35;
}

.glow-a {
  top: -8%;
  left: -10%;
  background: rgba(232, 164, 90, 0.28);
  animation: drift 14s ease-in-out infinite alternate;
}

.glow-b {
  right: -12%;
  bottom: 10%;
  background: rgba(143, 173, 138, 0.18);
  animation: drift 18s ease-in-out infinite alternate-reverse;
}

@keyframes drift {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to { transform: translate3d(4%, 6%, 0) scale(1.08); }
}

.topbar,
main,
.site-footer {
  position: relative;
  z-index: 1;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.25rem 1.5rem;
}

.brand {
  font-family: var(--font-display);
  font-size: 1.65rem;
  letter-spacing: 0.04em;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.1rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.nav a {
  transition: color 0.2s ease;
}

.nav a:hover {
  color: var(--ember);
}

.hero {
  max-width: 1100px;
  margin: 0 auto;
  padding: 4.5rem 1.5rem 3.5rem;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2rem;
  align-items: center;
  min-height: calc(100vh - 5rem);
}

.hero-kicker {
  margin: 0 0 0.75rem;
  color: var(--ember);
  letter-spacing: 0.16em;
  text-transform: lowercase;
  font-size: 0.82rem;
  font-weight: 600;
}

.hero-brand {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(4.5rem, 12vw, 7.5rem);
  line-height: 0.9;
  font-weight: 400;
  letter-spacing: 0.02em;
}

.hero-lead {
  max-width: 34rem;
  margin: 1.35rem 0 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.35rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--ember), var(--ember-deep));
  color: #1a120b;
}

.btn-ghost {
  border-color: var(--line);
  color: var(--ink);
  background: rgba(255, 255, 255, 0.03);
}

.btn-ghost:hover {
  border-color: rgba(232, 164, 90, 0.45);
}

.hero-visual {
  display: flex;
  justify-content: center;
}

.flame-panel {
  position: relative;
  width: min(280px, 70vw);
  height: min(280px, 70vw);
  border-radius: 40% 60% 55% 45% / 45% 40% 60% 55%;
  background:
    radial-gradient(circle at 40% 35%, rgba(232, 164, 90, 0.55), transparent 45%),
    radial-gradient(circle at 60% 70%, rgba(196, 107, 45, 0.4), transparent 50%),
    linear-gradient(160deg, #2a221b, #171310);
  box-shadow: var(--shadow);
  animation: morph 10s ease-in-out infinite;
}

@keyframes morph {
  0%, 100% { border-radius: 40% 60% 55% 45% / 45% 40% 60% 55%; }
  50% { border-radius: 55% 45% 40% 60% / 50% 55% 45% 50%; }
}

.ring,
.core {
  position: absolute;
  inset: 18%;
  border-radius: 50%;
  border: 1px solid rgba(243, 235, 225, 0.2);
}

.ring.delay {
  inset: 28%;
  animation: pulse 3.6s ease-in-out infinite;
}

.ring {
  animation: pulse 3.6s ease-in-out 0.4s infinite;
}

.core {
  inset: 38%;
  border: none;
  background: radial-gradient(circle, #ffe1b5, var(--ember) 45%, transparent 70%);
  filter: blur(2px);
  animation: breathe 2.8s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.35; transform: scale(1); }
  50% { opacity: 0.8; transform: scale(1.05); }
}

@keyframes breathe {
  0%, 100% { transform: scale(0.92); opacity: 0.75; }
  50% { transform: scale(1.08); opacity: 1; }
}

.section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 4rem 1.5rem;
}

.section-head {
  margin-bottom: 1.75rem;
}

.section-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 400;
}

.section-head p {
  margin: 0.55rem 0 0;
  color: var(--muted);
  max-width: 36rem;
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.stat {
  padding: 1.35rem 1.25rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.035), rgba(255, 255, 255, 0.01));
}

.stat-label,
.stat-hint {
  display: block;
  color: var(--muted);
  font-size: 0.86rem;
}

.stat-value {
  display: block;
  margin: 0.55rem 0 0.35rem;
  font-family: var(--font-display);
  font-size: 3rem;
  line-height: 1;
  color: var(--ember);
}

.task-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
}

.task {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1rem;
  align-items: start;
  padding: 1.15rem 1.2rem;
  border-bottom: 1px solid var(--line);
}

.task h3 {
  margin: 0;
  font-size: 1.05rem;
}

.task p {
  margin: 0.35rem 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.task time {
  color: var(--muted);
  font-size: 0.82rem;
  white-space: nowrap;
}

.priority {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2rem;
  height: 1.7rem;
  padding: 0 0.55rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.priority.high {
  color: #2a160c;
  background: var(--ember);
}

.priority.mid {
  color: #1c241b;
  background: var(--sage);
}

.priority.low {
  color: var(--muted);
  border: 1px solid var(--line);
}

.resource-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.resource {
  display: block;
  padding: 1.35rem 1.2rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.02);
  transition: border-color 0.2s ease, transform 0.2s ease, background 0.2s ease;
}

.resource:hover {
  transform: translateY(-2px);
  border-color: rgba(232, 164, 90, 0.45);
  background: rgba(232, 164, 90, 0.06);
}

.resource-title {
  display: block;
  font-weight: 650;
  margin-bottom: 0.35rem;
}

.resource-desc {
  color: var(--muted);
  font-size: 0.9rem;
}

.about-card {
  max-width: 42rem;
  padding: 1.4rem 0 0;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.about-card strong {
  color: var(--ink);
  font-weight: 650;
}

.site-footer {
  margin-top: 2rem;
  border-top: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.22);
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.5rem 2.4rem;
  text-align: center;
}

.footer-brand {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.25rem;
}

.footer-copy {
  margin: 0.55rem 0 0.85rem;
  color: var(--muted);
  font-size: 0.88rem;
}

.footer-beian {
  margin: 0;
  font-size: 0.88rem;
}

.footer-beian a {
  color: var(--muted);
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.footer-beian a:hover {
  color: var(--ember);
  border-bottom-color: rgba(232, 164, 90, 0.55);
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 2.5rem;
  }

  .hero-visual {
    order: -1;
  }

  .flame-panel {
    width: min(220px, 58vw);
    height: min(220px, 58vw);
  }

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

  .task {
    grid-template-columns: auto 1fr;
  }

  .task time {
    grid-column: 2;
  }
}

@media (max-width: 640px) {
  .topbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .nav {
    gap: 0.5rem 0.9rem;
  }
}