/* ══════════════════════════════════════════════
   Woshale 个人门户 · 样式 v2（风格升级版）
   设计变量集中在 :root，深色主题在 [data-theme="dark"]
   ══════════════════════════════════════════════ */
:root {
  --bg: #f8f7f3;             /* 页面底色：暖纸白 */
  --bg-alt: #f0eee8;         /* 交替区块 */
  --card: #ffffff;
  --ink: #191d21;            /* 主文字 */
  --muted: #5d6670;          /* 次级文字 */
  --faint: #98a1ab;
  --accent: #0e5a6d;         /* 主色：深海蓝绿 */
  --accent-2: #2a8fa3;       /* 渐变副色 */
  --accent-soft: #9dc9d2;
  --accent-ink: #ffffff;
  --hero-fill-1: #e2eef0;
  --hero-fill-2: #d3e7ea;
  --watermark: rgba(14, 90, 109, .055);
  --border: #e6e3db;
  --border-strong: #d5d1c6;
  --shadow-sm: 0 1px 2px rgba(25, 29, 33, .05);
  --shadow-lg: 0 2px 4px rgba(25, 29, 33, .04), 0 20px 44px -22px rgba(14, 90, 109, .28);
  --grain-opacity: .05;
  --radius: 18px;
  --font-sans: "Inter", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  --font-display: "Fraunces", Georgia, "Songti SC", serif;
}

[data-theme="dark"] {
  --bg: #0e1519;
  --bg-alt: #121b20;
  --card: #17232a;
  --ink: #e8edf0;
  --muted: #9aa8b2;
  --faint: #5f6f7a;
  --accent: #74c7d4;
  --accent-2: #4a9db0;
  --accent-soft: #2b4f58;
  --accent-ink: #0c1215;
  --hero-fill-1: #14222a;
  --hero-fill-2: #10202a;
  --watermark: rgba(116, 199, 212, .05);
  --border: #22313a;
  --border-strong: #2e4250;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, .25);
  --shadow-lg: 0 2px 4px rgba(0, 0, 0, .2), 0 24px 48px -24px rgba(0, 0, 0, .55);
  --grain-opacity: .07;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background .35s ease, color .35s ease;
}

/* 细腻噪点纹理，增加纸感 */
body::after {
  content: "";
  position: fixed; inset: 0;
  z-index: 2000; pointer-events: none;
  opacity: var(--grain-opacity);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.55'/%3E%3C/svg%3E");
}

.container { width: min(1080px, 100% - 3rem); margin-inline: auto; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
::selection { background: var(--accent-soft); color: var(--ink); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

/* ── 自托管字体 ───────────────────────── */
@font-face { font-family: "Fraunces"; src: url("/fonts/fraunces-latin-400-normal.woff2") format("woff2"); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: "Fraunces"; src: url("/fonts/fraunces-latin-400-italic.woff2") format("woff2"); font-weight: 400; font-style: italic; font-display: swap; }
@font-face { font-family: "Fraunces"; src: url("/fonts/fraunces-latin-500-normal.woff2") format("woff2"); font-weight: 500; font-style: normal; font-display: swap; }
@font-face { font-family: "Fraunces"; src: url("/fonts/fraunces-latin-600-normal.woff2") format("woff2"); font-weight: 600; font-style: normal; font-display: swap; }
@font-face { font-family: "Inter"; src: url("/fonts/inter-latin-400-normal.woff2") format("woff2"); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: "Inter"; src: url("/fonts/inter-latin-500-normal.woff2") format("woff2"); font-weight: 500; font-style: normal; font-display: swap; }
@font-face { font-family: "Inter"; src: url("/fonts/inter-latin-600-normal.woff2") format("woff2"); font-weight: 600; font-style: normal; font-display: swap; }

/* ── 顶部导航 ─────────────────────────── */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 1rem; height: 68px; }
.brand { display: flex; align-items: center; gap: .65rem; }
.brand:hover { text-decoration: none; }
.brand-mark { width: 30px; height: 30px; }
.brand-name { font-family: var(--font-display); font-weight: 500; font-size: 1.3rem; letter-spacing .01em; color: var(--ink); }

.site-nav { display: flex; align-items: center; gap: .4rem; }
.nav-link {
  color: var(--muted); font-size: .92rem; font-weight: 500;
  padding: .38rem .95rem; border-radius: 999px;
  transition: color .2s ease, background .2s ease;
}
.nav-link:hover { color: var(--ink); text-decoration: none; background: color-mix(in srgb, var(--accent) 8%, transparent); }
.nav-link.active { color: var(--accent-ink); background: var(--ink); }

.header-tools { display: flex; align-items: center; gap: .5rem; }
.theme-toggle {
  display: grid; place-items: center;
  width: 38px; height: 38px; border-radius: 50%;
  border: 1px solid var(--border); background: var(--card);
  color: var(--muted); cursor: pointer;
  transition: color .2s, border-color .2s, transform .2s;
}
.theme-toggle:hover { color: var(--accent); border-color: var(--accent-soft); transform: rotate(15deg); }
.theme-toggle .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: .5rem; }
.nav-toggle span { display: block; width: 22px; height: 2px; margin: 5px 0; background: var(--ink); border-radius: 2px; transition: transform .25s, opacity .25s; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── 首屏 ─────────────────────────────── */
.hero { position: relative; overflow: hidden; }
.hero-inner { position: relative; padding: clamp(4rem, 9vw, 6.5rem) 0 7.5rem; }

.hero-watermark {
  position: absolute; right: -2%; top: clamp(1rem, 4vw, 3rem);
  font-family: var(--font-display); font-style: italic; font-weight: 400;
  font-size: clamp(6rem, 17vw, 13rem); line-height: 1;
  color: transparent; -webkit-text-stroke: 1.5px var(--watermark);
  user-select: none; pointer-events: none; white-space: nowrap;
}

.hero-glow {
  position: absolute; width: 46vw; height: 46vw; max-width: 640px; max-height: 640px;
  right: -12%; top: -22%; border-radius: 50%; pointer-events: none;
  background: radial-gradient(circle at 35% 35%, var(--hero-fill-2), transparent 62%);
  opacity: .8; filter: blur(6px);
}

.hero-eyebrow { display: flex; align-items: center; gap: .6rem; margin: 0 0 1rem; color: var(--muted); font-size: .95rem; letter-spacing: .28em; }
.hero-name {
  margin: 0; font-family: var(--font-display); font-weight: 500;
  font-size: clamp(3.2rem, 8.5vw, 5.6rem); line-height: 1.06; letter-spacing: -.01em;
}
.hero-name em { font-style: italic; font-weight: 400; color: var(--accent); }
.hero-role { margin: 1.1rem 0 0; font-size: clamp(1.05rem, 2.4vw, 1.3rem); color: var(--accent); font-weight: 600; letter-spacing: .02em; }
.hero-tagline { margin: 1.15rem 0 0; max-width: 33em; color: var(--muted); font-size: 1.06rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .9rem; margin-top: 2.4rem; }

.hero-meta {
  display: flex; flex-wrap: wrap; gap: .6rem 1.6rem; list-style: none;
  margin: 2.8rem 0 0; padding: 0; color: var(--muted); font-size: .92rem;
}
.hero-meta li { display: flex; align-items: center; gap: .5rem; }
.hero-meta li::before { content: "·"; color: var(--accent-soft); font-weight: 700; }

.hero-wave { position: absolute; inset: auto 0 0 0; line-height: 0; pointer-events: none; }
.hero-wave svg { width: 100%; height: clamp(80px, 12vw, 160px); }

/* ── 按钮 ─────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .45rem;
  padding: .72rem 1.7rem; border-radius: 999px;
  font-size: .95rem; font-weight: 600; letter-spacing: .02em;
  border: 1.5px solid transparent; cursor: pointer;
  transition: transform .2s ease, box-shadow .25s ease, border-color .2s, color .2s, background .2s;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: var(--accent-ink);
  box-shadow: 0 8px 20px -10px color-mix(in srgb, var(--accent) 65%, transparent);
}
.btn-primary:hover { box-shadow: 0 14px 28px -10px color-mix(in srgb, var(--accent) 70%, transparent); }
.btn-ghost { border-color: var(--border-strong); color: var(--ink); background: transparent; }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn-lg { padding: .95rem 2.3rem; font-size: 1.02rem; }

/* ── 区块通用 ─────────────────────────── */
.section { padding: clamp(3.5rem, 8vw, 5.8rem) 0; }
.section-alt { background: var(--bg-alt); }

.section-label {
  display: flex; align-items: center; gap: 1rem;
  margin: 0 0 1rem; color: var(--faint);
  font-size: .8rem; font-weight: 600; letter-spacing: .32em; text-transform: uppercase;
}
.section-label::after { content: ""; flex: 1; height: 1px; background: var(--border); }
.section-label .latin { font-family: var(--font-display); font-style: italic; font-weight: 400; letter-spacing: .08em; text-transform: none; color: var(--accent); }

.section-title { margin: 0 0 2.6rem; font-size: clamp(1.55rem, 3.6vw, 2.1rem); line-height: 1.3; letter-spacing: -.01em; }

/* ── 关于 ─────────────────────────────── */
.about-grid { display: grid; grid-template-columns: 1.6fr 1fr; gap: 3rem; align-items: start; }
.about-text p { margin: 0 0 1.1rem; font-size: 1.05rem; }
.about-text p:last-child { margin-bottom: 0; }
.about-facts {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.6rem 1.7rem; box-shadow: var(--shadow-lg);
}
.facts-title { margin: 0 0 1.1rem; font-size: .95rem; color: var(--faint); letter-spacing: .14em; }
.chip-list { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: .55rem; }
.chip {
  background: color-mix(in srgb, var(--accent) 10%, var(--card)); color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 18%, transparent);
  border-radius: 999px; padding: .34rem .95rem; font-size: .88rem;
}

/* ── 项目 ─────────────────────────────── */
.project-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.4rem; }

.project-card {
  position: relative;
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm);
  display: flex; flex-direction: column;
  transition: transform .3s cubic-bezier(.2,.7,.3,1), box-shadow .3s ease, border-color .3s ease;
}
.project-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: color-mix(in srgb, var(--accent) 35%, var(--border));
}
.project-card.featured { grid-column: 1 / -1; flex-direction: row; }
.project-card.featured .project-media { flex: 0 0 44%; aspect-ratio: auto; border-bottom: 0; border-right: 1px solid var(--border); }

.project-media {
  position: relative; aspect-ratio: 16 / 10; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--hero-fill-1), var(--hero-fill-2));
  border-bottom: 1px solid var(--border);
}
.project-index {
  position: absolute; top: .9rem; left: 1.1rem;
  font-family: var(--font-display); font-style: italic; font-weight: 400;
  font-size: 1.05rem; color: var(--accent); opacity: .75; letter-spacing: .06em;
}
.project-glyph {
  font-family: var(--font-display); font-weight: 500;
  font-size: clamp(2.6rem, 5vw, 3.6rem); line-height: 1;
  color: color-mix(in srgb, var(--accent) 72%, transparent);
  transition: transform .35s cubic-bezier(.2,.7,.3,1);
}
.project-card:hover .project-glyph { transform: scale(1.08) rotate(-3deg); }

.project-body { padding: 1.2rem 1.35rem 1.4rem; display: flex; flex-direction: column; gap: .55rem; flex: 1; }
.project-card.featured .project-body { padding: 1.7rem 1.9rem; align-self: center; }
.project-head { display: flex; align-items: baseline; justify-content: space-between; gap: .8rem; }
.project-head h3 { margin: 0; font-size: 1.1rem; letter-spacing: -.01em; }
.project-card.featured .project-head h3 { font-size: 1.35rem; }
.project-year { color: var(--faint); font-size: .85rem; font-weight: 600; white-space: nowrap; font-variant-numeric: tabular-nums; }
.project-body p { margin: 0; color: var(--muted); font-size: .95rem; }
.project-card.featured .project-body p { font-size: 1.02rem; }
.project-tags { list-style: none; display: flex; flex-wrap: wrap; gap: .45rem; margin: .4rem 0 0; padding: 0; }
.project-tags li {
  font-size: .78rem; font-weight: 500; color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  border-radius: 999px; padding: .14rem .7rem;
}

/* ── 链接 ─────────────────────────────── */
.link-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.1rem; }
.link-card {
  display: grid; grid-template-columns: 1fr auto; grid-template-areas: "name arrow" "desc arrow";
  align-items: center; column-gap: .8rem;
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.15rem 1.3rem; color: var(--ink);
  box-shadow: var(--shadow-sm);
  transition: transform .25s ease, border-color .25s ease;
}
.link-card:hover { text-decoration: none; transform: translateY(-3px); border-color: color-mix(in srgb, var(--accent) 40%, var(--border)); }
.link-name { grid-area: name; font-weight: 600; font-size: 1.02rem; }
.link-desc { grid-area: desc; color: var(--muted); font-size: .88rem; }
.link-arrow { grid-area: arrow; color: var(--faint); font-size: 1.15rem; transition: transform .25s ease, color .25s ease; }
.link-card:hover .link-arrow { transform: translateX(5px); color: var(--accent); }

/* ── 联系 ─────────────────────────────── */
.contact-inner { text-align: center; padding-bottom: 1rem; }
.contact-inner .section-label { justify-content: center; }
.contact-inner .section-label::after { display: none; }
.contact-title { margin: 0 0 .9rem; font-size: clamp(1.7rem, 4vw, 2.4rem); letter-spacing: -.01em; }
.contact-text { margin: 0 0 2.1rem; color: var(--muted); }

/* ── 页脚 ─────────────────────────────── */
.site-footer { border-top: 1px solid var(--border); padding: 1.9rem 0; color: var(--muted); font-size: .9rem; }
.footer-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: .8rem; }
.footer-inner p { margin: 0; }
.back-top {
  display: inline-grid; place-items: center;
  width: 36px; height: 36px; border-radius: 50%;
  border: 1px solid var(--border); color: var(--muted);
  transition: color .2s, border-color .2s, transform .2s;
}
.back-top:hover { color: var(--accent); border-color: var(--accent-soft); transform: translateY(-3px); }

/* ── 入场动画 ─────────────────────────── */
.reveal { opacity: 0; transform: translateY(20px); filter: blur(5px); transition: opacity .7s ease, transform .7s cubic-bezier(.2,.7,.3,1), filter .7s ease; }
.reveal.visible { opacity: 1; transform: none; filter: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; filter: none; transition: none; }
  .btn:hover, .project-card:hover, .link-card:hover, .back-top:hover, .theme-toggle:hover { transform: none; }
  body, .project-card, .theme-toggle { transition: none; }
}

/* ── 响应式 ───────────────────────────── */
@media (max-width: 900px) {
  .project-grid, .link-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; gap: 2rem; }
  .project-card.featured { flex-direction: column; }
  .project-card.featured .project-media { flex: none; aspect-ratio: 16 / 9; border-right: 0; border-bottom: 1px solid var(--border); }
}
@media (max-width: 640px) {
  .project-grid, .link-grid { grid-template-columns: 1fr; }

  .nav-toggle { display: block; }
  .site-nav {
    position: absolute; top: 68px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--bg); border-bottom: 1px solid var(--border);
    padding: .4rem 1.2rem 1rem; margin: 0; max-height: 0; overflow: hidden;
    transition: max-height .3s ease;
  }
  .site-nav.open { max-height: 340px; }
  .site-nav .nav-link { padding: .8rem 1rem; border-radius: 10px; }
  .hero-watermark { font-size: 5.5rem; right: -6%; }
  .hero-inner { padding-bottom: 5.5rem; }
  .hero-meta { flex-direction: column; gap: .4rem; }
}