/* ========== 设计变量（建筑作品集风格：暖灰 / 黑白 / 铜色点缀） ========== */
:root {
  --color-bg: #edebe7;
  --color-surface: #f4f2ef;
  --color-text: #161513;
  --color-text-secondary: #7a766f;
  --color-border: #d9d5ce;
  --color-border-strong: #c4bfb6;
  --color-accent: #937550;
  --color-demo-bg: #fff4e0;
  --color-demo-text: #8a5a00;
  --radius: 0;
  --max-width: 1320px;
  --font-sans: system-ui, -apple-system, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}

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

html { font-size: 16px; }

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

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

code {
  background: #e2ded7;
  padding: 0.1em 0.35em;
  border-radius: 3px;
  font-size: 0.88em;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

/* 小型大写标签（参照风格的版式核心） */
.label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  margin: 0;
}

/* ========== 导航 ========== */
.site-header {
  background: transparent;
  position: relative;
  z-index: 10;
}

.nav {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.8rem;
  padding-top: 1.6rem;
  padding-bottom: 1.6rem;
}

.brand { display: block; line-height: 1.3; }
.brand:hover { text-decoration: none; }
.brand-name {
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.14em;
}
.brand-sub {
  display: block;
  font-size: 0.62rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  margin-top: 0.15rem;
}

.nav-links {
  display: flex;
  gap: 2.2rem;
  list-style: none;
  margin: 0;
  padding: 0 0 0.15rem;
  flex-wrap: wrap;
}

.nav-link {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  padding-bottom: 0.25rem;
  border-bottom: 1px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}
.nav-link:hover { color: var(--color-text); }
.nav-link.active {
  color: var(--color-text);
  border-bottom-color: var(--color-text);
}

/* ========== 首页 Hero（全幅效果图） ========== */
.hero {
  position: relative;
  height: clamp(560px, 58vw, 700px);
  overflow: hidden;
}

.hero-media { position: absolute; inset: 0; }
.hero-media img,
.hero-media video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 38%;
}

/* 从左往右的浅色渐变，保证标题与正文可读 */
.hero-media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    rgba(237, 235, 231, 0.97) 0%,
    rgba(237, 235, 231, 0.94) 45%,
    rgba(237, 235, 231, 0.72) 60%,
    rgba(237, 235, 231, 0) 82%
  );
}

.hero-content {
  position: relative;
  z-index: 1;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
}

.hero-eyebrow {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  margin: 0 0 1.4rem;
}

.hero-title {
  font-size: clamp(1.7rem, 3.2vw, 2.6rem);
  font-weight: 800;
  letter-spacing: 0;
  line-height: 1.3;
  margin: 0 0 1.1rem;
  max-width: 56rem;
}

.brand-accent { color: var(--color-accent); }

.hero-sub {
  font-size: 0.95rem;
  color: #44413c;
  max-width: 52rem;
  margin: 0 0 1.6rem;
  line-height: 1.9;
}

.hero-keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 2.2rem;
  list-style: none;
  padding: 0;
  margin: 0 0 2.2rem;
  font-size: 0.9rem;
  color: var(--color-text);
}

.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }

/* ========== 按钮（实心黑钮 / 浅底描边钮） ========== */
.btn {
  display: inline-block;
  min-width: 13rem;
  padding: 0.9rem 1.6rem;
  border-radius: 6px;
  text-align: center;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.btn-primary { background: var(--color-text); color: #f4f2ef; }
.btn-primary:hover { background: #000; }

.btn-ghost {
  background: rgba(255, 255, 255, 0.72);
  color: var(--color-text);
  border: 1px solid var(--color-border-strong);
}
.btn-ghost:hover { background: var(--color-text); color: #f4f2ef; border-color: var(--color-text); }

/* ========== 区块 ========== */
.section { padding: 3.5rem 0 1.5rem; }

.section-narrow {
  max-width: 46rem;
  margin: 0 auto;
  padding: 4rem 1.25rem 2rem;
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.8rem;
}

.section-title {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  margin: 0;
}

.section-more {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  white-space: nowrap;
  border-bottom: 1px solid transparent;
}
.section-more:hover { border-bottom-color: var(--color-text); }

.page-head { padding: 4.5rem 0 2.5rem; }

.page-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  margin: 0.6rem 0 0.8rem;
}

.page-sub {
  color: var(--color-text-secondary);
  font-size: 0.92rem;
  max-width: 40rem;
  margin: 0;
}

/* ========== 技能标签（方形描边） ========== */
.skill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.skill-chip {
  background: transparent;
  border: 1px solid var(--color-border-strong);
  border-radius: 0;
  padding: 0.55rem 1rem;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--color-text);
  transition: border-color 0.15s ease;
}
.skill-chip:hover { border-color: var(--color-text); }

/* ========== 项目卡片（无边框无阴影，图上文下） ========== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.2rem 1.8rem;
}

.card {
  background: transparent;
  border: none;
  box-shadow: none;
  color: var(--color-text);
  display: flex;
  flex-direction: column;
}

.card-cover {
  position: relative;
  aspect-ratio: 4 / 3;
  background: #ddd9d2;
  overflow: hidden;
}
.card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.card:hover .card-cover img { transform: scale(1.045); }

.badge-demo {
  position: absolute;
  top: 0.7rem;
  right: 0.7rem;
  background: rgba(244, 242, 239, 0.92);
  color: var(--color-text-secondary);
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 0.2rem 0.55rem;
  border: 1px solid var(--color-border);
  border-radius: 0;
}

.badge-inline {
  position: static;
  display: inline-block;
  vertical-align: middle;
  margin-left: 0.6rem;
  font-size: 0.68rem;
}

.card-body { padding: 0.9rem 0 0; flex: 1; }

.card-title {
  margin: 0 0 0.3rem;
  font-size: 0.98rem;
  font-weight: 700;
}

.card-desc {
  margin: 0 0 0.55rem;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-meta {
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  display: flex;
  justify-content: space-between;
  gap: 0.8rem;
}

/* ========== 首页 关于我 三栏 ========== */
.about-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.9fr 1.1fr;
  gap: 3.2rem;
}

.about-col .label { margin-bottom: 1.3rem; }

.about-portrait {
  width: 100%;
  max-width: 300px;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: top;
  background: #ddd9d2;
  margin-bottom: 1.4rem;
}

.about-text {
  font-size: 0.88rem;
  color: #44413c;
  margin: 0 0 1.4rem;
  max-width: 26rem;
}

/* 奖项 / 经历时间线 */
.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
}
.timeline li {
  position: relative;
  padding: 0 0 1.35rem 1.5rem;
  border-left: 1px solid var(--color-border-strong);
}
.timeline li:last-child { padding-bottom: 0; }
.timeline li::before {
  content: '';
  position: absolute;
  left: -4px;
  top: 7px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-text);
}
.timeline-year {
  display: block;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--color-text-secondary);
}
.timeline-title { font-size: 0.92rem; font-weight: 700; }
.timeline-sub {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  margin: 0;
}

/* ========== 项目详情 ========== */
.back-link {
  margin: 0 0 1.6rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.project-head { margin-bottom: 2rem; }

.project-meta {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  flex-wrap: wrap;
  color: var(--color-text-secondary);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.tag {
  background: transparent;
  border: 1px solid var(--color-border-strong);
  border-radius: 0;
  padding: 0.15rem 0.6rem;
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.project-cover {
  border-radius: 0;
  border: none;
  margin-bottom: 2.2rem;
  aspect-ratio: 21 / 10;
  width: 100%;
  object-fit: cover;
  background: #ddd9d2;
}

.project-tech { margin-bottom: 2rem; }
.project-tech .section-title { margin-bottom: 1rem; }

.project-link { margin-top: 2.4rem; }

/* ========== 正文排版（Markdown 渲染） ========== */
.prose h2 {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 2.4rem 0 0.7rem;
  padding-bottom: 0;
  border-bottom: none;
}

.prose p, .prose li { color: #3d3a35; font-size: 0.95rem; }

.prose ul { padding-left: 1.4rem; }

.prose blockquote {
  margin: 1.4rem 0;
  padding: 0.2rem 0 0.2rem 1.1rem;
  border-left: 2px solid var(--color-border-strong);
  color: var(--color-text-secondary);
  font-size: 0.88rem;
}

/* ========== 联系 / 404 / 页脚 ========== */
.contact-section { padding-bottom: 3rem; }
.contact-text { margin: 0.35rem 0; color: var(--color-text-secondary); font-size: 0.9rem; }

.not-found { text-align: center; padding-top: 6rem; padding-bottom: 6rem; }

.site-footer {
  border-top: 1px solid var(--color-border-strong);
  margin-top: 5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1.2fr 0.8fr 1fr;
  gap: 2.5rem;
  padding: 3.2rem 0 2.4rem;
}

.footer-brand .brand-name { font-size: 1rem; }
.footer-tagline {
  font-size: 0.62rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  margin: 0.3rem 0 0;
}

.footer-col .label { margin-bottom: 1.1rem; }

.footer-row {
  display: block;
  font-size: 0.84rem;
  color: var(--color-text-secondary);
  margin: 0 0 0.5rem;
}
a.footer-row:hover { color: var(--color-text); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 1.4rem 0 1.6rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.72rem;
  color: var(--color-text-secondary);
}
.footer-bottom p { margin: 0; }

/* ========== 移动端 ========== */
@media (max-width: 900px) {
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; gap: 2.4rem; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .container { padding: 0 1.25rem; }
  .hero { height: auto; min-height: 88vh; }
  .hero-content { padding-top: 3.5rem; padding-bottom: 3.5rem; }
  .hero-media::after {
    background: linear-gradient(
      180deg,
      rgba(237, 235, 231, 0.94) 0%,
      rgba(237, 235, 231, 0.72) 50%,
      rgba(237, 235, 231, 0.4) 100%
    );
  }
  .hero-sub { max-width: 100%; }
  .hero-keywords { gap: 1.2rem 1.6rem; font-size: 0.85rem; }
  .btn { min-width: 100%; }
  .nav { gap: 0.4rem; padding-top: 1.1rem; padding-bottom: 1.1rem; }
  .nav-links { gap: 1.3rem; }
  .card-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 1.8rem; }
  .page-head { padding: 3rem 0 1.8rem; }
}