:root {
  --bg: linear-gradient(180deg, #e6f3ff 0%, #e8fff6 100%); /* 蓝绿渐变背景 */
  --surface: rgba(255, 255, 255, 0.34); /* 再提高通透度 */
  --surface-strong: #ffffff;
  --border: rgba(0, 0, 0, 0.10); /* 细边框 */
  --text: #1d1d1f; /* 深灰文字 */
  --muted: #6e6e73; /* 次级文字 */
  --accent: #0071e3; /* Apple 蓝 */
  --container: 1200px;
  --header-h: 64px; /* 顶部导航高度，用于锚点偏移 */
  --anchor-extra: 32px; /* 锚点额外留白 */
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }

.site-header {
  position: sticky; top: 0; z-index: 1000;
  backdrop-filter: saturate(180%) blur(14px);
  background: rgba(255, 255, 255, 0.32);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; gap: 24px; height: 64px; }
.brand { font-weight: 700; letter-spacing: 0.2px; cursor: pointer; user-select: none; }
/* 品牌芯片：与导航胶囊一致，椭圆形 */
.brand.glass {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px; /* 椭圆 */
  background: rgba(255, 255, 255, 0.45);
  border: 1px solid var(--border);
  box-shadow: 0 1px 2px rgba(0,0,0,0.04);
}
.brand.glass:hover { border-color: var(--accent); color: var(--accent); background: rgba(255,255,255,0.6); }
.brand:focus { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
.site-nav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 12px; }
/* 导航按钮采用“品牌芯片”风格 */
.site-nav a {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 999px;
  color: var(--text);
  text-decoration: none;
  background: rgba(255, 255, 255, 0.45);
  border: 1px solid var(--border);
  box-shadow: 0 1px 2px rgba(0,0,0,0.04);
}
.site-nav a:hover { border-color: var(--accent); color: var(--accent); background: rgba(255,255,255,0.6); }
.site-nav a:active { transform: translateY(1px); }
.cta { margin-left: auto; color: #fff; background: var(--accent); padding: 8px 14px; border-radius: 999px; text-decoration: none; font-weight: 600; box-shadow: 0 1px 0 rgba(0,0,0,0.04); }

.section { padding: 80px 0; }
.section { scroll-margin-top: calc(var(--header-h) + var(--anchor-extra)); }
.hero { padding-top: 100px; padding-bottom: 60px; text-align: center; }
.hero-title { margin: 0 0 8px; font-size: 40px; letter-spacing: 0.2px; }
.hero-subtitle { margin: 0; color: var(--muted); }

/* Headline style like reference */
.headline-stack { position: relative; display: inline-block; }
.headline-fill { margin: 0; font-size: 64px; line-height: 1; letter-spacing: 2px; color: #693314; text-shadow: 0 4px 0 rgba(0,0,0,0.08); }
.headline-outline { position: absolute; left: 50%; top: -20px; transform: translateX(-50%); font-size: 96px; line-height: 1; letter-spacing: 4px; color: transparent; -webkit-text-stroke: 8px rgba(0,0,0,0.12); text-stroke: 8px rgba(0,0,0,0.12); opacity: 0.65; filter: blur(0.2px); }

@media (max-width: 640px) {
  .headline-fill { font-size: 44px; }
  .headline-outline { font-size: 72px; -webkit-text-stroke: 6px rgba(0,0,0,0.12); }
}

.about-grid { display: grid; grid-template-columns: 160px 1fr; gap: 24px; align-items: start; }
.avatar-placeholder { width: 160px; height: 160px; border-radius: 20px; background: linear-gradient(135deg, #f2f2f7, #ffffff); border: 1px solid var(--border); }
.projects-list { margin: 12px 0 0; padding-left: 18px; color: var(--muted); }

/* CV style layout for about section */
.about-cv { display: grid; grid-template-columns: 380px 1fr; gap: 48px; align-items: start; }
.avatar-large { width: 320px; height: 320px; border-radius: 24px; background: linear-gradient(135deg, #efe7ff, #ffffff 60%); border: 1px solid var(--border); box-shadow: 0 6px 18px rgba(0,0,0,0.08) inset; }
.cv-left { display: grid; gap: 28px; justify-items: start; }
.cv-right { display: grid; gap: 20px; }
.cv-title { margin: 0; font-size: 36px; letter-spacing: 0.2px; }
.cv-intro { margin: 0; color: var(--muted); }
.cv-block { display: grid; gap: 10px; }
.cv-label { margin: 0; font-size: 14px; letter-spacing: 2px; color: var(--muted); }
.cv-rule { height: 8px; background: repeating-linear-gradient(90deg, var(--accent), var(--accent) 4px, transparent 4px, transparent 10px); border-radius: 4px; opacity: 0.6; }
.cv-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.cv-year { display: inline-block; width: 48px; color: var(--accent); font-weight: 600; }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
/* 卡片按内容高度自适应，图片保持原比例（宽度撑满，height:auto） */
.card { display: flex; flex-direction: column; align-items: stretch; justify-content: flex-start; border-radius: 16px; border: 1px solid var(--border); background: var(--surface); color: var(--muted); position: relative; overflow: hidden; box-shadow: 0 1px 2px rgba(0,0,0,0.04); padding: 0; }
.card .thumb { position: static; display: block; width: 100%; height: auto; object-fit: contain; opacity: 1; filter: none; }
.card .thumb.is-cover { height: 100%; object-fit: cover; }
/* 视频播放图标悬浮覆盖在封面中央，标题作为下方说明文字 */
.video-card { position: relative; }
.video-card .media { position: relative; width: 100%; aspect-ratio: 16 / 9; overflow: hidden; }
.video-card .media .thumb { width: 100%; height: 100%; object-fit: cover; }
.video-card .play { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); z-index: 1; width: 44px; height: 44px; border-radius: 999px; display: grid; place-items: center; color: #fff; background: rgba(0,0,0,0.35); backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px); }
.video-card .media .play { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); }
.video-card > span:last-child { display: block; padding: 8px 10px 10px; color: var(--text); }
.image-card { position: relative; }
.image-card > span { display: block; padding: 8px 10px 10px; color: var(--text); }
/* 可选：为单张图片去白边（裁切填充） */
.image-card .media { position: relative; width: 100%; aspect-ratio: 16 / 9; overflow: hidden; }
.image-card .media .thumb { width: 100%; height: 100%; object-fit: cover; }

.filters { display: flex; gap: 8px; margin-bottom: 16px; }
.filter-btn { appearance: none; border: 1px solid var(--border); background: var(--surface); color: var(--text); padding: 6px 12px; border-radius: 999px; cursor: pointer; }
.filter-btn.is-active, .filter-btn:hover { border-color: var(--accent); color: var(--accent); }

.contact-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.contact a { color: var(--accent); text-decoration: none; }

/* Reveal on scroll */
.reveal { opacity: 0; transform: translateY(12px); transition: opacity 480ms ease, transform 480ms ease; }
.reveal.is-visible { opacity: 1; transform: none; }

/* Modal */
.modal { position: fixed; inset: 0; display: none; align-items: center; justify-content: center; }
.modal[aria-hidden="false"] { display: flex; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(0,0,0,0.4); backdrop-filter: blur(4px); }
.modal-content { position: relative; z-index: 1; background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 12px; }
.modal-content.video { width: min(900px, 96vw); }
.modal-content.image { background: var(--surface); width: min(1100px, 92vw); }
.modal-close { position: absolute; top: 8px; right: 8px; appearance: none; border: 0; background: var(--surface); color: var(--text); width: 32px; height: 32px; border-radius: 999px; cursor: pointer; }
#video-player { width: 100%; height: auto; background: #000; }
#lightbox-img { display: block; width: 100%; height: auto; max-height: 78vh; object-fit: contain; border-radius: 10px; }

/* Section glass card wrapper */
.section-card {
  position: relative;
  background: linear-gradient(180deg, rgba(255,255,255,0.46) 0%, rgba(255,255,255,0.18) 100%);
  border: 1px solid rgba(255,255,255,0.42);
  border-radius: 22px;
  box-shadow: 0 18px 44px rgba(0,0,0,0.10), 0 2px 8px rgba(0,0,0,0.04), inset 0 1px 0 rgba(255,255,255,0.38);
  backdrop-filter: saturate(200%) blur(30px);
  -webkit-backdrop-filter: saturate(200%) blur(30px);
  padding: 24px 0;
}
.section-card::before {
  content: "";
  position: absolute; inset: 0; border-radius: 22px; pointer-events: none;
  background:
    radial-gradient(1200px 220px at 20% -6%, rgba(255,255,255,0.58), rgba(255,255,255,0) 45%),
    radial-gradient(900px 200px at 80% -4%, rgba(255,255,255,0.32), rgba(255,255,255,0) 55%);
}
.section-card::after {
  content: "";
  position: absolute; inset: 0; border-radius: 22px; pointer-events: none;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.56), inset 0 12px 24px rgba(255,255,255,0.12), 0 0 0 1px rgba(0,60,120,0.07);
}
.section-card .section-title { margin-top: 0; }
.section-group.section-card { max-width: var(--container); margin: 32px auto; padding: 0; }
.section-group.section-card .section { padding: 40px 0; }
.section-group.section-card .section + .section { border-top: 1px solid var(--border); }

/* Unified heights for two kinds of cards */
.size-profile { max-width: calc(var(--container) + 48px); margin: 24px auto; }
.size-gallery { max-width: calc(var(--container) + 48px); margin: 24px auto; }
.size-profile { min-height: 420px; }
.size-gallery { min-height: 520px; }
.lightbox-actions { display: flex; justify-content: space-between; margin-top: 8px; }
.lightbox-actions button { appearance: none; border: 1px solid var(--border); background: var(--surface); color: var(--text); padding: 6px 12px; border-radius: 8px; cursor: pointer; }

@media (max-width: 900px) {
  .grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .header-inner { height: 56px; }
  :root { --header-h: 56px; }
  .about-grid { grid-template-columns: 1fr; }
  .grid { grid-template-columns: 1fr; }
  .about-cv { grid-template-columns: 1fr; }
  .avatar-large { width: 100%; height: 220px; }
}

/* New About Hero */
.about-hero { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 32px; align-items: center; }
.hero-content { display: grid; gap: 14px; }
.brand-chip { display: inline-block; padding: 6px 10px; border-radius: 999px; background: rgba(0,0,0,0.06); border: 1px solid var(--border); font-weight: 600; color: var(--text); width: fit-content; }
.hero-heading { margin: 0; font-size: 40px; letter-spacing: 0.2px; }
.hero-desc { margin: 0; color: var(--muted); }
.hero-meta { list-style: none; padding: 0; margin: 10px 0 0; display: grid; gap: 6px; }
.hero-meta .k { display: inline-block; width: 48px; color: var(--accent); font-weight: 600; }
.hero-visual { position: relative; width: min(320px, 32vw); aspect-ratio: 3 / 4; min-height: 0; margin-left: auto; }
.hero-img { width: 100%; height: 100%; object-fit: contain; position: relative; z-index: 1; border-radius: 20px; background: transparent; filter: drop-shadow(0 12px 24px rgba(0,0,0,0.14)); }
.hero-img.cutout { -webkit-mask-image: radial-gradient(circle at 50% 10%, #000 60%, rgba(0,0,0,0.2) 78%, transparent 100%); mask-image: radial-gradient(circle at 50% 10%, #000 60%, rgba(0,0,0,0.2) 78%, transparent 100%); }
.hero-visual.no-img { min-height: 0; width: 0; }
.ring { position: absolute; inset: auto; border-radius: 50%; filter: blur(10px); opacity: 0.9; }
.ring-a { width: 220px; height: 220px; right: 10%; top: 8%; background: radial-gradient(closest-side, rgba(255,255,255,0.8), rgba(255,255,255,0.1)); border: 1px solid rgba(255,255,255,0.6); }
.ring-b { width: 160px; height: 160px; right: -4%; bottom: 6%; background: radial-gradient(closest-side, rgba(255,255,255,0.7), rgba(255,255,255,0.06)); border: 1px solid rgba(255,255,255,0.5); }

@media (max-width: 900px) {
  .about-hero { grid-template-columns: 1fr; }
  .hero-visual { margin: 0 auto; }
}