:root {
  --primary: #7aa38f;
  --accent: #f8c8c0;
  --text: #55636f;
  --paper: #fdfcf8;
  --glass-opacity: 0.6;
  --font-size-base: 16px;
  --title-size: 48px;
  --section-title-size: 30px;
  --card-radius: 20px;
  --max-width: 1120px;
  --nav-height: 72px;
  --hero-height: 88vh;
  --section-gap: 24px;
  --button-radius: 999px;
  --nav-blur: 14px;
  --grain-opacity: 0.16;
  --grain-size: 3px;
  --grid-size: 26px;
  --grid-line-opacity: 0.12;
  --dots-opacity: 0.12;
  --waves-opacity: 0.12;
  --bg-overlay-opacity: 0.48;
  --section-padding: 32px;
  --work-card-min-width: 260px;
  --work-image-height: 180px;
  --btn-padding-y: 10px;
  --btn-padding-x: 15px;
  --btn-font-size: 15px;
  --btn-min-width: 120px;
  --nav-font-size: 18px;
  --nav-font-weight: 500;
  --nav-brand-size: 40px;
  --nav-brand-weight: 700;
  --nav-letter-spacing: 0px;
  --nav-text-color: #55636f;
  --nav-brand-color: #55636f;
  --nav-menu-color: #55636f;
  --title-weight: 700;
  --subtitle-size: 42px;
  --subtitle-weight: 600;
  --section-title-weight: 600;
  --work-title-size: 44px;
  --work-title-weight: 650;
  --body-size: 16px;
  --body-weight: 400;
  --body-line-height: 1.8;
  --body-letter-spacing: 0px;
  --footer-size: 14px;
  --footer-weight: 500;
  --title-color: #55636f;
  --subtitle-color: #55636f;
  --section-title-color: #55636f;
  --work-title-color: #55636f;
  --body-color: #55636f;
  --footer-color: #55636f;
  --btn-text-color: #55636f;
  --btn-bg-color: #f7f8fa;
  --btn-hover-text-color: #43515f;
  --btn-hover-bg-color: #e8f2ec;
  --nav-line-top: 0px;
  --nav-line-bottom: 0px;
  --title-line-top: 0px;
  --title-line-bottom: 12px;
  --subtitle-line-top: 4px;
  --subtitle-line-bottom: 16px;
  --section-title-line-top: 0px;
  --section-title-line-bottom: 16px;
  --work-title-line-top: 0px;
  --work-title-line-bottom: 10px;
  --body-line-top: 0px;
  --body-line-bottom: 12px;
  --footer-line-top: 0px;
  --footer-line-bottom: 0px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  font-size: var(--font-size-base);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Hiragino Sans GB", sans-serif;
  background: linear-gradient(125deg, #fdf7f4, #edf6f0);
  min-height: 100vh;
}
body.dark {
  --text: #dde3eb;
  --paper: #1f252d;
  --primary: #98c7ae;
  --accent: #f1b2a8;
  background: linear-gradient(125deg, #171c22, #12171d);
}
#bg-layer {
  position: fixed;
  inset: 0;
  z-index: -2;
  background-size: cover;
  background-position: center;
  transition: filter 0.35s ease;
  will-change: transform;
  transform: translateZ(0);
}
body.dark #bg-layer { filter: brightness(0.4) saturate(0.9); }
#bg-layer::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: var(--bg-overlay-opacity);
  background-image: radial-gradient(circle at 12% 20%, rgba(255, 255, 255, 0.5), transparent 30%),
    radial-gradient(circle at 85% 5%, rgba(255, 233, 226, 0.48), transparent 26%),
    radial-gradient(circle at 70% 80%, rgba(215, 242, 224, 0.45), transparent 35%);
}
body.dark #bg-layer::after {
  opacity: 0.22;
  background-image: radial-gradient(circle at 10% 15%, rgba(72, 88, 94, 0.45), transparent 35%),
    radial-gradient(circle at 75% 70%, rgba(58, 67, 81, 0.45), transparent 32%);
}
#bg-layer::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: var(--grain-opacity);
  background-image: radial-gradient(rgba(122, 163, 143, 0.25) 0.65px, transparent 0.65px);
  background-size: var(--grain-size) var(--grain-size);
}
#bg-layer[data-pattern="grid"]::before {
  opacity: var(--grid-line-opacity);
  background-image: linear-gradient(rgba(122, 163, 143, 0.35) 1px, transparent 1px),
    linear-gradient(90deg, rgba(122, 163, 143, 0.35) 1px, transparent 1px);
  background-size: var(--grid-size) var(--grid-size);
}
#bg-layer[data-pattern="dots"]::before {
  opacity: var(--dots-opacity);
  background-image: radial-gradient(rgba(122, 163, 143, 0.35) 1.1px, transparent 1.1px);
  background-size: calc(var(--grid-size) * 0.7) calc(var(--grid-size) * 0.7);
}
#bg-layer[data-pattern="waves"]::before {
  opacity: var(--waves-opacity);
  background-image: repeating-radial-gradient(circle at 0 100%, rgba(122, 163, 143, 0.35) 0 1px, transparent 1px 18px);
  background-size: 120px 60px;
}
.glass {
  background: color-mix(in srgb, var(--paper) calc(var(--glass-opacity) * 100%), transparent);
  backdrop-filter: blur(var(--nav-blur));
  border: 1px solid color-mix(in srgb, #fff 65%, var(--primary));
}
.top-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--nav-height);
  width: min(var(--max-width), calc(100% - 32px));
  margin: 12px auto 0;
  border-radius: 999px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 14px 0 22px;
}
.nav-right { display: flex; gap: 8px; flex-wrap: wrap; }
.nav-link, .btn {
  border: 0;
  text-decoration: none;
  border-radius: var(--button-radius);
  padding: var(--btn-padding-y) var(--btn-padding-x);
  font-size: var(--btn-font-size);
  min-width: var(--btn-min-width);
  color: var(--btn-text-color);
  background: var(--btn-bg-color);
  transition: transform 0.2s ease, background-color 0.2s ease, box-shadow 0.2s ease;
}
.nav-link:hover, .btn:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(0, 0, 0, 0.1); color: var(--btn-hover-text-color); background: var(--btn-hover-bg-color); }
body.dark .btn,
body.dark .nav-link {
  color: #f2f6fa;
  background: color-mix(in srgb, #5f6979 62%, #ffffff);
}
main {
  width: min(var(--max-width), calc(100% - 32px));
  margin: 24px auto 80px;
  display: grid;
  gap: var(--section-gap);
}
section { border-radius: calc(var(--card-radius) + 4px); padding: var(--section-padding); }
.hero {
  min-height: var(--hero-height);
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 28px;
  align-items: center;
}
.hero h1 { margin: var(--title-line-top) 0 var(--title-line-bottom); font-size: var(--title-size); font-weight: var(--title-weight); line-height: 1.12; letter-spacing: 0.5px; }
.hero h3 { font-size: var(--subtitle-size); font-weight: var(--subtitle-weight); margin: var(--subtitle-line-top) 0 var(--subtitle-line-bottom); line-height: 1.2; }
.hero h1 { color: var(--title-color); }
.hero h3 { color: var(--subtitle-color); }
.hero p, p { font-size: var(--body-size); font-weight: var(--body-weight); line-height: var(--body-line-height); letter-spacing: var(--body-letter-spacing); margin-top: var(--body-line-top); margin-bottom: var(--body-line-bottom); color: var(--body-color); }
.hero-avatar { width: 100%; border-radius: 28px; min-height: 300px; object-fit: cover; box-shadow: 0 20px 40px rgba(60, 80, 70, 0.14); }
.section-title { margin: var(--section-title-line-top) 0 var(--section-title-line-bottom); font-size: var(--section-title-size); font-weight: var(--section-title-weight); color: var(--section-title-color); }
.work-title { margin: var(--work-title-line-top) 0 var(--work-title-line-bottom); font-size: var(--work-title-size); font-weight: var(--work-title-weight); line-height: 1.25; color: var(--work-title-color); }
.works-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(var(--work-card-min-width), 1fr)); gap: 16px; }
.work-card { border-radius: var(--card-radius); overflow: hidden; transition: transform 0.28s ease, box-shadow 0.28s ease; }
.work-card:hover { transform: translateY(-8px); box-shadow: 0 24px 30px rgba(0, 0, 0, 0.08); }
.work-card img { width: 100%; height: var(--work-image-height); object-fit: cover; }
.work-content { padding: 14px; }
.social-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
  margin: 14px 0 14px;
}
.contact-btn { display: inline-block; }
.footer {
  border-radius: var(--card-radius);
  padding: 14px 18px;
  text-align: center;
}
.footer { font-size: var(--footer-size); font-weight: var(--footer-weight); }
.footer, .footer a { color: var(--footer-color); text-decoration: none; }
.footer-sep { margin: 0 8px; opacity: 0.6; }
.nav-link { font-size: var(--nav-font-size); font-weight: var(--nav-font-weight); letter-spacing: var(--nav-letter-spacing); color: var(--nav-menu-color); }
.nav-left { font-size: var(--nav-brand-size); font-weight: var(--nav-brand-weight); letter-spacing: var(--nav-letter-spacing); color: var(--nav-brand-color); }
.nav-collapse-btn { display: none; border: 0; background: var(--btn-bg-color); color: var(--nav-menu-color); border-radius: 10px; padding: 8px 10px; }
.nav-link, .nav-left { margin-top: var(--nav-line-top); margin-bottom: var(--nav-line-bottom); }
.footer { margin-top: var(--footer-line-top); margin-bottom: var(--footer-line-bottom); }
.social-item { display: inline-flex; align-items: center; justify-content: center; gap: 8px; }
.social-logo { width: 16px; height: 16px; border-radius: 4px; flex: 0 0 auto; }
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.68s ease, transform 0.68s ease; }
.reveal.in { opacity: 1; transform: translateY(0); }
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
  .top-nav { border-radius: 18px; height: auto; padding: 10px 12px; gap: 8px; align-items: stretch; flex-direction: row; flex-wrap: wrap; }
  .nav-collapse-btn { display: inline-block; margin-left: auto; }
  .nav-right { display: none; width: 100%; flex-direction: column; }
  .top-nav.open .nav-right { display: flex; }
  .nav-right .nav-link, .nav-right .btn { width: 100%; }
}