/* =========================================================
   吴一腾 · 个人主页样式
   浅色背景 + 绿色主色调，单文件、无外部依赖，桌面与手机共用
   ========================================================= */

/* ---------- 变量 ---------- */
:root {
  --green-900: #14402f;
  --green-700: #21624a;
  --green-600: #2f7d5d;
  --green-500: #3d9970;
  --green-100: #dcede3;
  --green-50: #eef6f0;

  --bg: #f5f8f4;
  --surface: #ffffff;
  --ink: #14251c;
  --ink-soft: #455a4f;
  --ink-muted: #6b7f74;
  --line: #dde7df;

  --radius: 18px;
  --shadow-sm: 0 1px 2px rgba(20, 37, 28, 0.05), 0 8px 20px rgba(20, 37, 28, 0.05);
  --shadow-md: 0 14px 34px rgba(20, 37, 28, 0.11);
  --max: 1080px;
}

/* ---------- 基础重置 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  background-color: var(--bg);
  background-image:
    radial-gradient(900px 420px at 88% -8%, rgba(61, 153, 112, 0.12), transparent 70%),
    radial-gradient(700px 380px at 4% 2%, rgba(47, 125, 93, 0.08), transparent 72%);
  background-repeat: no-repeat;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--green-700);
  text-decoration: none;
}

a:hover {
  color: var(--green-600);
}

::selection {
  background: var(--green-100);
  color: var(--green-900);
}

:focus-visible {
  outline: 3px solid #7cc4a0;
  outline-offset: 3px;
  border-radius: 4px;
}

/* 键盘用户跳过导航 */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  padding: 10px 18px;
  background: var(--green-700);
  color: #fff;
  border-radius: 0 0 10px 0;
}

.skip-link:focus {
  left: 0;
}

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(245, 248, 244, 0.86);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--line);
}

.nav {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--green-900);
}

.brand-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--green-600);
  box-shadow: 0 0 0 4px rgba(47, 125, 93, 0.14);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 30px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-links a {
  position: relative;
  display: inline-block;
  padding: 4px 0;
  font-size: 15px;
  color: var(--ink-soft);
  transition: color 0.18s ease;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--green-500);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.22s ease;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--green-700);
}

.nav-links a:hover::after,
.nav-links a:focus-visible::after {
  transform: scaleX(1);
}

/* ---------- 首屏 ---------- */
.hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: 66px 24px 74px;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  align-items: center;
  gap: 56px;
}

.eyebrow {
  margin: 0 0 14px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--green-600);
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.6rem, 6vw, 4rem);
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--green-900);
}

.tagline {
  margin: 20px 0 0;
  max-width: 32em;
  font-size: clamp(1rem, 1.5vw, 1.12rem);
  line-height: 1.85;
  color: var(--ink-soft);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 26px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  transition: background-color 0.18s ease, border-color 0.18s ease,
    transform 0.18s ease, box-shadow 0.18s ease;
}

.btn-solid {
  background: var(--green-600);
  color: #fff;
  box-shadow: 0 10px 22px rgba(47, 125, 93, 0.26);
}

.btn-solid:hover {
  background: var(--green-700);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 14px 26px rgba(47, 125, 93, 0.3);
}

.btn-ghost {
  background: #fff;
  border-color: #cfe0d5;
  color: var(--green-700);
}

.btn-ghost:hover {
  background: var(--green-50);
  border-color: var(--green-500);
  color: var(--green-700);
  transform: translateY(-1px);
}

.hero-figure {
  margin: 0;
  display: grid;
  justify-items: center;
  gap: 18px;
}

.avatar {
  width: clamp(210px, 26vw, 290px);
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 50%;
  border: 8px solid #fff;
  box-shadow: var(--shadow-md);
}

.avatar-caption {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--ink-muted);
}

/* ---------- 通用板块 ---------- */
.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: 10px 24px 74px;
  scroll-margin-top: 88px;
}

.section h2 {
  position: relative;
  margin: 0 0 30px;
  padding-left: 18px;
  font-size: clamp(1.5rem, 2.6vw, 1.95rem);
  letter-spacing: 0.01em;
  color: var(--green-900);
}

.section h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.24em;
  bottom: 0.24em;
  width: 6px;
  border-radius: 4px;
  background: linear-gradient(180deg, var(--green-600), var(--green-500));
}

.section-lead {
  margin: -12px 0 30px;
  max-width: 60ch;
  color: var(--ink-soft);
  line-height: 1.85;
}

/* ---------- 关于我 ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.6fr;
  gap: 40px;
  align-items: start;
}

.about-text p {
  margin: 0 0 18px;
  color: var(--ink-soft);
  line-height: 1.95;
}

.about-text p:last-child {
  margin-bottom: 0;
}

.about-text strong {
  color: var(--green-700);
}

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

.fact-card h3 {
  margin: 0 0 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--green-600);
}

.fact-card dl {
  margin: 0;
  display: grid;
  gap: 16px;
}

.fact-card dl > div {
  display: grid;
  gap: 3px;
}

.fact-card dt {
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--ink-muted);
}

.fact-card dd {
  margin: 0;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--ink);
}

/* ---------- 我的作品 ---------- */
.works {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.work-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 26px 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.work-card:hover {
  transform: translateY(-3px);
  border-color: #bcd9c8;
  box-shadow: var(--shadow-md);
}

.work-index {
  margin: 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--green-500);
}

.work-card h3 {
  margin: 0;
  font-size: 1.14rem;
  line-height: 1.5;
  color: var(--ink);
}

.work-desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 6px 0 0;
  padding: 0;
  list-style: none;
}

.tags li {
  padding: 5px 11px;
  font-size: 12px;
  color: var(--green-700);
  background: var(--green-50);
  border: 1px solid #d5e6da;
  border-radius: 999px;
}

/* ---------- 联系我 ---------- */
.contact-card {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 30px;
  padding: 32px;
  background: linear-gradient(135deg, #ffffff 0%, #f1f8f3 100%);
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: var(--shadow-sm);
}

.contact-text p {
  margin: 0 0 12px;
  color: var(--ink-soft);
  line-height: 1.9;
}

.contact-note {
  margin: 0;
  font-size: 13px;
  color: var(--ink-muted);
}

.mail {
  display: grid;
  gap: 5px;
  padding: 18px 24px;
  background: var(--green-600);
  color: #fff;
  border-radius: 14px;
  box-shadow: 0 10px 24px rgba(47, 125, 93, 0.28);
  transition: background-color 0.18s ease, transform 0.18s ease;
}

.mail:hover {
  background: var(--green-700);
  color: #fff;
  transform: translateY(-2px);
}

.mail-label {
  font-size: 11.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  opacity: 0.82;
}

.mail-address {
  font-size: 15.5px;
  font-weight: 600;
  letter-spacing: 0.01em;
}

/* ---------- 页脚 ---------- */
.site-footer {
  margin-top: 12px;
  padding: 36px 24px 46px;
  text-align: center;
  background: #f0f5f0;
  border-top: 1px solid var(--line);
}

.update {
  display: inline-block;
  margin: 0 0 10px;
  padding: 6px 16px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--green-700);
  background: #fff;
  border: 1px solid #d5e6da;
  border-radius: 999px;
}

.copyright {
  margin: 0;
  font-size: 13px;
  color: var(--ink-muted);
}

/* ---------- 小平板 / 大屏手机：作品改为单列 ---------- */
@media (max-width: 720px) {
  .works {
    grid-template-columns: 1fr;
  }
}

/* ---------- 平板 ---------- */
@media (max-width: 880px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 38px;
    padding: 48px 24px 56px;
    text-align: center;
  }

  .hero-figure {
    order: -1;
  }

  .tagline {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-actions {
    justify-content: center;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 26px;
  }

  .contact-card {
    grid-template-columns: 1fr;
    gap: 22px;
    padding: 26px;
  }

  .mail {
    justify-items: center;
    text-align: center;
  }
}

/* ---------- 手机 ---------- */
@media (max-width: 600px) {
  body {
    font-size: 15.5px;
  }

  .nav {
    padding: 0 16px;
    min-height: 58px;
    flex-wrap: wrap;
    gap: 4px 12px;
    padding-top: 10px;
    padding-bottom: 10px;
  }

  .nav-links {
    gap: 18px;
  }

  .nav-links a {
    font-size: 14px;
  }

  .section {
    padding: 8px 18px 56px;
    scroll-margin-top: 76px;
  }

  .hero {
    padding: 36px 18px 48px;
  }

  .hero h1 {
    font-size: clamp(2.1rem, 9vw, 2.6rem);
  }

  .avatar {
    width: clamp(170px, 52vw, 220px);
    border-width: 6px;
  }

  .btn {
    padding: 12px 22px;
    font-size: 14.5px;
  }

  .work-card {
    padding: 22px 20px;
  }

  .update {
    font-size: 12.5px;
  }
}

/* ---------- 减少动态效果 ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}