/* ===== 基础 ===== */
:root {
  --ink: #1c1917;
  --muted: #6b6560;
  --paper: #faf9f7;
  --card: #ffffff;
  --line: #e7e2dc;
  --accent: #e8590c;
  --accent-dark: #c2410c;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(28, 25, 23, .08), 0 8px 24px rgba(28, 25, 23, .06);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-dark); }

/* ===== 导航 ===== */
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(250, 249, 247, .92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.nav-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand { font-size: 20px; font-weight: 700; color: var(--ink); }
.brand-dot { color: var(--accent); }

.nav-links { display: flex; gap: 24px; }
.nav-links a { color: var(--muted); font-size: 15px; }
.nav-links a:hover { color: var(--ink); }

/* ===== 首屏 ===== */
.hero {
  padding: 110px 24px 90px;
  text-align: center;
}

.hero-inner { max-width: 640px; margin: 0 auto; }

.hero-greeting {
  color: var(--accent);
  font-weight: 600;
  letter-spacing: .12em;
  font-size: 15px;
  margin-bottom: 12px;
}

.hero-name {
  font-size: clamp(44px, 8vw, 72px);
  font-weight: 800;
  letter-spacing: .02em;
  line-height: 1.15;
}

.hero-role {
  font-size: clamp(18px, 3vw, 22px);
  color: var(--muted);
  margin: 14px 0 10px;
  font-weight: 500;
}

.hero-desc { color: var(--muted); max-width: 460px; margin: 0 auto 30px; }

/* ===== 按钮 ===== */
.btn {
  display: inline-block;
  padding: 11px 26px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
  min-height: 44px;
  line-height: 1.4;
}

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

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); color: #fff; box-shadow: 0 6px 18px rgba(232, 89, 12, .3); }

.btn-ghost { border: 1px solid var(--line); color: var(--ink); background: var(--card); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

.hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ===== 通用板块 ===== */
.section { padding: 76px 24px; }
.section-alt { background: #f4f1ed; }

.section-inner { max-width: 960px; margin: 0 auto; }

.section-title {
  font-size: 30px;
  font-weight: 800;
  margin-bottom: 10px;
  letter-spacing: .02em;
}

.section-lead { color: var(--muted); margin-bottom: 36px; }

/* ===== 关于 ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 48px;
  align-items: start;
}

.about-text p { margin-bottom: 14px; }

.about-facts { list-style: none; }
.about-facts li {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  display: flex;
  gap: 16px;
}

.fact-label { color: var(--muted); min-width: 44px; }

/* ===== 技能 ===== */
.skills-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.skill-item {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 24px;
  box-shadow: var(--shadow);
}

.skill-item h3 { font-size: 17px; margin-bottom: 8px; }
.skill-item p { color: var(--muted); font-size: 14.5px; }

/* ===== 作品 ===== */
.project-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.project-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 24px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.project-card h3 { font-size: 17px; }
.project-card p { color: var(--muted); font-size: 14.5px; flex: 1; }

.project-link { font-size: 14.5px; font-weight: 600; }

.project-tag {
  align-self: flex-start;
  font-size: 12px;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 2px 10px;
}

/* ===== 联系 ===== */
.contact-inner { text-align: center; }
.contact-links { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.contact-note { color: var(--muted); margin-top: 22px; font-size: 14px; }

/* ===== 页脚 ===== */
.footer {
  border-top: 1px solid var(--line);
  padding: 28px 24px;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
}

/* ===== 响应式 ===== */
@media (max-width: 760px) {
  .about-grid { grid-template-columns: 1fr; gap: 24px; }
  .skills-list, .project-grid { grid-template-columns: 1fr; }
  .nav-links { gap: 16px; }
  .hero { padding: 80px 24px 60px; }
  .section { padding: 56px 20px; }
}