/* ============================================================
   刘晓茹 · 作品集（互动编程 作业三）
   配色沿用前两次作业：米白 / 墨黑 / 灰蓝 / 橘红 / 明黄
   ============================================================ */

:root {
  --paper: #f2ead2;
  --ink: #141416;
  --ink-soft: #1b1b1f;
  --blue: #6088a8;
  --orange: #e84a16;
  --yellow: #f6bc48;

  --line: rgba(242, 234, 210, 0.14);
  --text-dim: rgba(242, 234, 210, 0.58);
  --text-faint: rgba(242, 234, 210, 0.34);
  --max: 1080px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* 顶部极淡的两团光，避免纯黑死板 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at 82% 8%, rgba(96, 136, 168, 0.2), transparent 46%),
    radial-gradient(circle at 6% 92%, rgba(232, 74, 22, 0.14), transparent 44%);
  z-index: 0;
}

.wrap {
  position: relative;
  z-index: 1;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 28px;
}

/* ---------------- 导航 ---------------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 0;
  backdrop-filter: blur(14px);
  background: linear-gradient(to bottom, rgba(20, 20, 22, 0.92), rgba(20, 20, 22, 0.55));
  border-bottom: 1px solid rgba(242, 234, 210, 0.07);
}

.nav .brand {
  font-size: 14px;
  letter-spacing: 0.24em;
  color: var(--text-dim);
  text-transform: uppercase;
}

.nav nav {
  display: flex;
  gap: 22px;
  font-size: 13.5px;
}

.nav nav a {
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.2s;
}

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

/* ---------------- 首屏 ---------------- */
.hero {
  padding: 92px 0 76px;
}

.eyebrow {
  font-size: 12px;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--yellow);
  margin: 0 0 20px;
}

.hero h1 {
  font-size: clamp(44px, 8vw, 86px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 0 0 24px;
  font-weight: 600;
}

.hero h1 em {
  font-style: normal;
  color: var(--orange);
}

.hero .tagline {
  font-size: clamp(15px, 2vw, 18px);
  color: var(--text-dim);
  max-width: 620px;
  margin: 0 0 34px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 12px 22px;
  border-radius: 999px;
  border: 1px solid rgba(242, 234, 210, 0.22);
  color: var(--paper);
  font-size: 14px;
  text-decoration: none;
  transition: transform 0.2s, border-color 0.2s, background 0.2s, color 0.2s;
}

.btn:hover {
  transform: translateY(-2px);
  border-color: var(--orange);
  background: rgba(232, 74, 22, 0.14);
}

.btn.primary {
  background: var(--orange);
  border-color: var(--orange);
  color: #fff;
}

.btn.primary:hover {
  background: #f0611f;
}

/* ---------------- 章节标题 ---------------- */
.section-head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 26px 0 22px;
  border-top: 1px solid var(--line);
}

.section-head h2 {
  font-size: 15px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  margin: 0;
  font-weight: 600;
  color: var(--text-dim);
}

.section-head span {
  font-size: 12.5px;
  color: var(--text-faint);
}

/* ---------------- 作品卡片 ---------------- */
.work {
  padding: 8px 0 60px;
}

.work-top {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 18px;
}

.work-index {
  font-size: 12px;
  letter-spacing: 0.26em;
  color: var(--text-faint);
  margin-bottom: 8px;
}

.work h3 {
  font-size: clamp(26px, 3.6vw, 38px);
  margin: 0;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.work .one-liner {
  margin: 8px 0 0;
  color: var(--text-dim);
  font-size: 15px;
  max-width: 560px;
}

/* 内嵌窗口 */
.frame-shell {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow: hidden;
  background: #0b0b0d;
  box-shadow: 0 24px 60px -32px rgba(0, 0, 0, 0.9);
}

.frame-shell iframe {
  display: block;
  width: 100%;
  border: 0;
  background: #0b0b0d;
}

.frame-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 16px;
  border-bottom: 1px solid rgba(242, 234, 210, 0.08);
  background: rgba(242, 234, 210, 0.03);
  font-size: 12.5px;
  color: var(--text-faint);
}

.frame-bar .dots {
  display: flex;
  gap: 6px;
}

.frame-bar .dots i {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  display: block;
  background: rgba(242, 234, 210, 0.18);
}

.frame-bar a {
  color: var(--blue);
  text-decoration: none;
  white-space: nowrap;
}

.frame-bar a:hover {
  color: var(--yellow);
}

/* 四行说明：标题 / 一句话 / 创作思路 / 技术 */
.meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px 26px;
  margin-top: 20px;
  padding: 20px 22px;
  border: 1px solid rgba(242, 234, 210, 0.09);
  border-radius: 14px;
  background: rgba(242, 234, 210, 0.025);
}

.meta div {
  font-size: 13.5px;
  color: var(--text-dim);
  line-height: 1.75;
}

.meta div b {
  display: block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 5px;
}

.meta div.wide {
  grid-column: 1 / -1;
}

/* ---------------- 关于我 ---------------- */
.about {
  padding: 34px 0 40px;
}

.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 40px;
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(242, 234, 210, 0.03);
}

.about h2 {
  font-size: clamp(24px, 3vw, 32px);
  margin: 0 0 14px;
  font-weight: 600;
}

.about p {
  margin: 0 0 14px;
  color: var(--text-dim);
  font-size: 14.5px;
}

.about dl {
  margin: 0;
  display: grid;
  gap: 14px;
}

.about dt {
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.about dd {
  margin: 3px 0 0;
  font-size: 15px;
}

.about a {
  color: var(--yellow);
  text-decoration: none;
  border-bottom: 1px solid rgba(246, 188, 72, 0.35);
}

.about a:hover {
  color: #fff;
  border-color: #fff;
}

/* ---------------- 页脚 ---------------- */
footer {
  padding: 30px 0 46px;
  border-top: 1px solid var(--line);
  font-size: 12.5px;
  color: var(--text-faint);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
}

/* ---------------- 小屏适配 ---------------- */
@media (max-width: 760px) {
  .wrap {
    padding: 0 18px;
  }

  .hero {
    padding: 62px 0 52px;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 26px;
    padding: 24px;
  }

  .nav nav {
    gap: 14px;
    font-size: 12.5px;
  }

  .meta {
    padding: 16px 16px;
  }
}