/* =========================================================
   hulkai.cn · 个人主页
   深色首屏 + 浅色内容；零构建、无外部字体/CDN
   ========================================================= */

:root {
  --ink: #080d18;
  --ink-2: #0d1524;
  --ink-3: #111c30;
  --white: #ffffff;
  --paper: #ffffff;
  --paper-soft: #f5f7fa;
  --text: #121a29;
  --text-2: #344052;
  --muted: #5f6c80;
  --line: #e3e8ef;
  --line-strong: #d4dce8;
  --blue: #2f6bff;
  --blue-dark: #1c4ed8;
  --cyan: #2bd9c1;
  --amber: #f0b429;
  --green: #54e1a6;
  --radius: 20px;
  --container: 1200px;
  --nav-h: 64px;
  --mono: "SFMono-Regular", "SF Mono", "Cascadia Code", Consolas, "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; }
img { max-width: 100%; display: block; }
h1, h2, h3, h4, p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }
code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: #eef2f8;
  border: 1px solid #e1e7f0;
  border-radius: 5px;
  padding: 1px 5px;
  white-space: nowrap;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
}

.skip {
  position: absolute;
  left: 16px;
  top: -80px;
  z-index: 100;
  background: #fff;
  color: var(--text);
  padding: 10px 16px;
  border-radius: 8px;
  font-size: 14px;
  text-decoration: none;
  transition: top 0.2s ease;
}
.skip:focus { top: 16px; }

/* ---------------- 导航 ---------------- */
.site-nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 60;
  height: var(--nav-h);
  background: rgba(8, 13, 24, 0.72);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  backdrop-filter: blur(16px) saturate(1.2);
  -webkit-backdrop-filter: blur(16px) saturate(1.2);
  transition: background 0.25s ease, border-color 0.25s ease;
}
.site-nav.scrolled {
  background: rgba(8, 13, 24, 0.96);
  border-bottom-color: rgba(255, 255, 255, 0.12);
}
.nav-inner {
  max-width: 1240px;
  height: 100%;
  margin: 0 auto;
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  text-decoration: none;
  flex: none;
}
.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, #2f6bff, #2bd9c1);
  color: #04101d;
  font-family: var(--mono);
  font-size: 12.5px;
  font-weight: 800;
  letter-spacing: 0.02em;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-text b { font-size: 14px; font-weight: 700; letter-spacing: 0.01em; }
.brand-text em {
  margin-top: 3px;
  font-family: var(--mono);
  font-style: normal;
  font-size: 8.5px;
  letter-spacing: 0.14em;
  color: #7c8da8;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 30px;
  font-size: 13.5px;
  color: #a9b8d2;
}
.nav-links a {
  position: relative;
  text-decoration: none;
  color: inherit;
  padding: 4px 0;
  transition: color 0.18s ease;
}
.nav-links a:hover { color: #fff; }
.nav-links a.active { color: #fff; }
.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -6px;
  height: 1.5px;
  background: linear-gradient(90deg, var(--blue), var(--cyan));
}
.nav-right { display: flex; align-items: center; gap: 14px; flex: none; }
.nav-gh {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  color: #a9b8d2;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: color 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}
.nav-gh:hover { color: #fff; border-color: rgba(255, 255, 255, 0.28); background: rgba(255, 255, 255, 0.05); }
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 9px;
  background: #fff;
  color: #0a0f1a;
  font-size: 12.5px;
  font-weight: 700;
  text-decoration: none;
  transition: background 0.18s ease, transform 0.18s ease;
}
.nav-cta:hover { background: #dce8ff; transform: translateY(-1px); }
.nav-cta span { font-size: 11px; }
.nav-toggle {
  display: none;
  width: 38px;
  height: 38px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 9px;
  background: transparent;
  cursor: pointer;
  padding: 0;
  position: relative;
}
.nav-toggle span {
  position: absolute;
  left: 10px;
  right: 10px;
  height: 1.5px;
  background: #dbe6f7;
  transition: transform 0.2s ease, top 0.2s ease, opacity 0.2s ease;
}
.nav-toggle span:nth-child(1) { top: 15px; }
.nav-toggle span:nth-child(2) { top: 22px; }
body.nav-open .nav-toggle span:nth-child(1) { top: 18px; transform: rotate(45deg); }
body.nav-open .nav-toggle span:nth-child(2) { top: 18px; transform: rotate(-45deg); }

/* ---------------- 首屏 ---------------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--nav-h) + 82px) 0 100px;
  background: var(--ink);
  color: #e9eef8;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(900px 540px at 12% -8%, rgba(47, 107, 255, 0.30), transparent 62%),
    radial-gradient(720px 520px at 96% 2%, rgba(43, 217, 193, 0.13), transparent 62%);
  pointer-events: none;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(ellipse at 50% 0%, #000 8%, transparent 72%);
  mask-image: radial-gradient(ellipse at 50% 0%, #000 8%, transparent 72%);
  pointer-events: none;
}
.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.12fr 0.88fr;
  gap: 58px;
  align-items: center;
}
.status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid rgba(84, 225, 166, 0.24);
  background: rgba(84, 225, 166, 0.07);
  color: #a9f0cd;
  font-size: 11.5px;
  letter-spacing: 0.02em;
}
.pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 4px rgba(84, 225, 166, 0.14);
  animation: pulse 2.2s ease-out infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(84, 225, 166, 0.30); }
  70% { box-shadow: 0 0 0 7px rgba(84, 225, 166, 0); }
  100% { box-shadow: 0 0 0 0 rgba(84, 225, 166, 0); }
}
.hero-eyebrow {
  margin: 22px 0 0;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.22em;
  color: #6f84a6;
}
.hero h1 {
  margin: 16px 0 0;
  font-size: clamp(40px, 4.5vw, 64px);
  line-height: 1.08;
  letter-spacing: -0.03em;
  font-weight: 800;
  color: #fff;
}
.grad {
  background: linear-gradient(100deg, #8ab4ff 0%, #6fe6d4 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.hero-lede {
  max-width: 580px;
  margin: 24px 0 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: #9fb0c8;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 30px;
}
.btn-hero {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 46px;
  padding: 0 20px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}
.btn-hero.primary {
  background: linear-gradient(100deg, #2f6bff, #2bd9c1);
  color: #04101d;
  box-shadow: 0 12px 34px rgba(47, 107, 255, 0.32);
}
.btn-hero.primary:hover { transform: translateY(-2px); box-shadow: 0 16px 40px rgba(47, 107, 255, 0.42); }
.btn-hero.ghost {
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.03);
  color: #dce6f6;
}
.btn-hero.ghost:hover { border-color: rgba(255, 255, 255, 0.34); background: rgba(255, 255, 255, 0.06); }
.btn-hero.icon {
  width: 46px;
  padding: 0;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.03);
  color: #dce6f6;
}
.btn-hero.icon:hover { border-color: rgba(255, 255, 255, 0.34); background: rgba(255, 255, 255, 0.06); }
.arr { font-size: 13px; opacity: 0.85; }
.hero-note {
  margin-top: 12px;
  font-size: 11.5px;
  color: #6b7d99;
  letter-spacing: 0.02em;
}
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 34px;
  margin-top: 42px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.09);
}
.hero-stats b {
  display: block;
  font-family: var(--mono);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.1;
  color: #fff;
  letter-spacing: -0.02em;
}
.hero-stats span {
  display: block;
  margin-top: 6px;
  font-size: 11px;
  color: #7e93b8;
  letter-spacing: 0.03em;
}

/* 系统结构卡 */
.sys-card {
  position: relative;
  padding: 20px;
  border-radius: 18px;
  border: 1px solid rgba(120, 160, 255, 0.22);
  background: linear-gradient(165deg, rgba(27, 40, 66, 0.96), rgba(9, 15, 27, 0.97));
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.46), inset 0 1px 0 rgba(255, 255, 255, 0.06);
}
.sys-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.028) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
}
.sys-card > * { position: relative; z-index: 1; }
.sys-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.kicker {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.2em;
  color: #7186a7;
}
.sys-head h2 {
  margin-top: 2px;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: #fff;
}
.live {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  border-radius: 999px;
  border: 1px solid rgba(84, 225, 166, 0.26);
  background: rgba(84, 225, 166, 0.07);
  color: #74e9b5;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.14em;
}
.live i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px rgba(84, 225, 166, 0.8);
}
.sys-flow {
  display: grid;
  grid-template-columns: 1fr 30px 1fr;
  gap: 0;
  padding: 18px 0;
}
.flow-col { display: flex; flex-direction: column; gap: 8px; }
.flow-label {
  font-family: var(--mono);
  font-size: 8.5px;
  letter-spacing: 0.2em;
  color: #5f7394;
}
.node {
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.045);
  color: #e8eef9;
  font-size: 12px;
  font-weight: 600;
  line-height: 1.3;
}
.node span {
  display: block;
  margin-top: 3px;
  font-size: 9.5px;
  font-weight: 400;
  color: #8fa2c0;
}
.node-blue { border-color: rgba(94, 145, 255, 0.38); background: rgba(64, 110, 220, 0.13); }
.node-cyan { border-color: rgba(56, 224, 200, 0.36); background: rgba(30, 160, 150, 0.12); }
.node-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.mini {
  padding: 6px 4px;
  border-radius: 7px;
  border: 1px dashed rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.025);
  color: #a9b8d2;
  font-size: 9.5px;
  text-align: center;
  line-height: 1.25;
}
.sys-link { position: relative; display: flex; align-items: center; justify-content: center; }
.sys-link::before {
  content: "";
  position: absolute;
  left: 2px;
  right: 2px;
  top: 50%;
  border-top: 1px dashed rgba(120, 160, 255, 0.34);
}
.sys-link span {
  position: relative;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 12px rgba(43, 217, 193, 0.9);
}
.sys-foot {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}
.sys-foot span {
  padding: 4px 8px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.05);
  color: #a9b8d2;
  font-size: 9.5px;
}

/* ---------------- 通用区块 ---------------- */
.section { padding: 96px 0; scroll-margin-top: calc(var(--nav-h) + 8px); }
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: 42px;
}
.section-eyebrow {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  color: var(--blue);
  text-transform: uppercase;
}
.section-title {
  margin-top: 10px;
  font-size: clamp(28px, 3vw, 40px);
  line-height: 1.18;
  letter-spacing: -0.025em;
  font-weight: 800;
  color: var(--text);
}
.section-desc {
  max-width: 640px;
  margin-top: 14px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}
.section-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  flex: none;
  padding-bottom: 4px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 1px solid transparent;
  transition: border-color 0.18s ease, color 0.18s ease;
}
.section-link:hover { color: var(--blue-dark); border-bottom-color: var(--blue-dark); }

/* ---------------- 作品 ---------------- */
.work-card {
  display: grid;
  grid-template-columns: 1.02fr 0.98fr;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: #fff;
  box-shadow: 0 10px 34px rgba(17, 24, 39, 0.05);
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
}
.work-card:hover {
  transform: translateY(-3px);
  border-color: var(--line-strong);
  box-shadow: 0 22px 54px rgba(17, 24, 39, 0.10);
}
.work-card + .work-card { margin-top: 28px; }
.work-card.reverse .work-media { order: 2; }
.work-media {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 460px;
  padding: 30px;
  overflow: hidden;
}
.work-media.soft {
  background:
    radial-gradient(rgba(47, 107, 255, 0.07) 1px, transparent 1px),
    linear-gradient(160deg, #f4f7fc 0%, #e9eff8 100%);
  background-size: 18px 18px, auto;
}
.work-media.light {
  background: #eef1f6;
  background-image: radial-gradient(rgba(18, 26, 41, 0.10) 1px, transparent 1px);
  background-size: 18px 18px;
}
.work-body { padding: 42px 44px; }
.work-top { display: flex; align-items: center; gap: 10px; }
.work-index {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: #8b97a8;
}
.badge {
  padding: 3px 8px;
  border-radius: 5px;
  border: 1px solid #e0e6ef;
  background: #f4f6f9;
  color: #5d6b7f;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.03em;
}
.badge-live {
  border-color: rgba(28, 78, 216, 0.18);
  background: rgba(47, 107, 255, 0.07);
  color: var(--blue-dark);
}
.work-body h3 {
  margin: 11px 0 3px;
  font-size: clamp(25px, 2.3vw, 31px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--text);
}
.work-en {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.14em;
  color: #93a0b2;
  text-transform: uppercase;
}
.work-desc {
  margin-top: 18px;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--text-2);
}
.work-points {
  display: grid;
  gap: 10px;
  margin-top: 20px;
}
.work-points li {
  position: relative;
  padding-left: 18px;
  font-size: 13.2px;
  line-height: 1.68;
  color: #2b3646;
}
.work-points li::before {
  content: "";
  position: absolute;
  left: 1px;
  top: 7px;
  width: 6px;
  height: 6px;
  border-radius: 1.5px;
  background: var(--blue);
  transform: rotate(45deg);
}
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 22px;
}
.tags span {
  padding: 4px 8px;
  border-radius: 5px;
  border: 1px solid #e2e8f1;
  background: #f5f7fa;
  color: #4e5f78;
  font-family: var(--mono);
  font-size: 10px;
}
.work-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 40px;
  padding: 0 16px;
  border-radius: 9px;
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: var(--blue-dark);
  border: 1px solid var(--blue-dark);
  color: #fff;
  box-shadow: 0 8px 20px rgba(28, 78, 216, 0.22);
}
.btn-primary:hover { background: #173fb4; border-color: #173fb4; box-shadow: 0 10px 26px rgba(28, 78, 216, 0.30); }
.btn-ghost {
  background: #fff;
  border: 1px solid var(--line-strong);
  color: var(--text);
}
.btn-ghost:hover { border-color: var(--blue); color: var(--blue-dark); }
.btn-dark {
  background: var(--text);
  border: 1px solid var(--text);
  color: #fff;
}
.btn-dark:hover { background: #000; border-color: #000; }
.btn-light {
  background: #fff;
  border: 1px solid #fff;
  color: var(--ink);
  height: 46px;
  padding: 0 22px;
  font-size: 14px;
}
.btn-light:hover { background: #dce8ff; box-shadow: 0 10px 26px rgba(255, 255, 255, 0.12); }
.work-note {
  margin-top: 14px;
  font-size: 11.5px;
  color: #8491a5;
}

/* 功能卡片（协同问数主卡 + 2×2 协同功能） */
.feat-map {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 460px;
}
.feat-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}
.feat-head > span:first-child {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: #7d8a9d;
}
.map-badge {
  padding: 3px 7px;
  border-radius: 5px;
  border: 1px solid rgba(217, 158, 26, 0.38);
  background: #fdf5e0;
  color: #8a6d1a;
  font-size: 9.5px;
}
.feat-ic {
  flex: none;
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  color: #fff;
}
.feat-ic svg { width: 15px; height: 15px; }
.feat-hero {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px;
  border-radius: 13px;
  border: 1px solid rgba(47, 107, 255, 0.28);
  background: linear-gradient(150deg, #f2f7ff, #e9f2fd);
  box-shadow: 0 10px 26px rgba(28, 78, 216, 0.10);
}
.feat-hero-t { min-width: 0; }
.feat-hero b { font-size: 14px; color: #1c2942; }
.feat-hero p {
  margin-top: 3px;
  font-size: 11.5px;
  line-height: 1.6;
  color: #4c586b;
}
.feat-hero code {
  display: block;
  margin-top: 10px;
  padding: 7px 10px;
  border-radius: 8px;
  border: 1px solid rgba(120, 160, 255, 0.20);
  background: #0d1626;
  color: #74e9b5;
  font-size: 10.5px;
  line-height: 1.55;
  white-space: normal;
  text-align: left;
}
.feat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 10px;
}
.feat {
  padding: 13px;
  border-radius: 11px;
  border: 1px solid #e0e7f1;
  background: #fff;
  box-shadow: 0 5px 14px rgba(23, 35, 60, 0.05);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.feat:hover {
  transform: translateY(-2px);
  border-color: #c3d4ee;
  box-shadow: 0 10px 22px rgba(23, 35, 60, 0.09);
}
.feat b {
  display: block;
  margin-top: 9px;
  font-size: 12.5px;
  color: #1c2942;
}
.feat p {
  margin-top: 4px;
  font-size: 10.5px;
  line-height: 1.6;
  color: #5f6c80;
}
.map-foot {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  padding: 0 4px;
  font-size: 10.5px;
  letter-spacing: 0.02em;
  color: #8491a5;
}
.map-foot i {
  flex: none;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(43, 217, 193, 0.18);
}

/* 截图叠放 */
.shot-stack {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 470px;
  padding: 10px 0 26px;
}
.shot {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid #d8dfe9;
  border-radius: 9px;
  background: #fff;
  box-shadow: 0 14px 36px rgba(17, 24, 39, 0.13);
}
.shot-main { width: 86%; }
.shot-sub {
  position: absolute;
  right: -2px;
  bottom: 0;
  width: 56%;
  box-shadow: 0 18px 44px rgba(17, 24, 39, 0.20);
}
.shot-bar {
  display: flex;
  align-items: center;
  gap: 4px;
  height: 18px;
  padding: 0 8px;
  background: #f1f4f8;
  border-bottom: 1px solid #e4e8ef;
}
.shot-bar i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #cbd3e0;
}
.shot-bar span {
  margin-left: 5px;
  font-family: var(--mono);
  font-size: 8px;
  color: #8b97a8;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.shot img {
  width: 100%;
  height: 288px;
  object-fit: cover;
  object-position: top left;
}
.shot-sub img { height: 178px; }
.shot figcaption {
  position: absolute;
  left: 8px;
  bottom: 8px;
  padding: 3px 6px;
  border-radius: 4px;
  background: rgba(8, 13, 24, 0.84);
  color: #fff;
  font-size: 9px;
  letter-spacing: 0.02em;
}

/* ---------------- 博客 ---------------- */
.notes-section {
  background: var(--paper-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.notes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.note-card {
  display: flex;
  flex-direction: column;
  min-height: 258px;
  padding: 26px 26px 22px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
  text-decoration: none;
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
}
.note-card:hover {
  transform: translateY(-4px);
  border-color: #c9d4e4;
  box-shadow: 0 18px 40px rgba(17, 24, 39, 0.09);
}
.note-top { display: flex; align-items: center; justify-content: space-between; }
.note-cat {
  padding: 3px 8px;
  border-radius: 5px;
  background: rgba(47, 107, 255, 0.07);
  border: 1px solid rgba(47, 107, 255, 0.14);
  color: var(--blue-dark);
  font-size: 10px;
  font-weight: 600;
}
.note-time {
  font-family: var(--mono);
  font-size: 10px;
  color: #8b97a8;
}
.note-card h3 {
  margin: 15px 0 0;
  font-size: 19px;
  line-height: 1.42;
  letter-spacing: -0.01em;
  font-weight: 800;
  color: var(--text);
}
.note-card p {
  flex: 1;
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.76;
  color: var(--muted);
}
.note-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 20px;
  padding-top: 14px;
  border-top: 1px solid #eef1f5;
  font-size: 11px;
  color: #93a0b2;
}
.note-arrow { color: var(--blue); font-weight: 600; }

/* ---------------- 关于 ---------------- */
.about-grid {
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  gap: 70px;
  align-items: start;
}
.about-lede {
  margin-top: 20px;
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-2);
  font-weight: 500;
}
.about-text {
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
}
.about-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.skills { border-top: 1px solid var(--line); }
.skill-row {
  display: grid;
  grid-template-columns: 132px 1fr;
  gap: 18px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}
.skill-row h4 {
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.07em;
  color: #7d8a9d;
  text-transform: uppercase;
}
.skill-row p {
  font-size: 13.5px;
  line-height: 1.72;
  color: #344052;
}

/* ---------------- 页脚 ---------------- */
.site-footer {
  padding: 72px 0 38px;
  background: var(--ink);
  color: #c9d4e6;
}
.footer-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 36px;
  padding: 46px 48px;
  border: 1px solid rgba(255, 255, 255, 0.10);
  border-radius: 22px;
  background:
    radial-gradient(600px 300px at 12% 0%, rgba(47, 107, 255, 0.20), transparent 60%),
    linear-gradient(160deg, rgba(20, 31, 52, 0.9), rgba(10, 16, 28, 0.96));
}
.footer-card h2 {
  font-size: clamp(22px, 2.7vw, 34px);
  line-height: 1.32;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: #fff;
}
.footer-card p {
  margin-top: 12px;
  font-size: 13px;
  color: #8fa0ba;
}
.footer-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 11.5px;
  color: #65758f;
}

/* ---------------- 滚动出现 ---------------- */
.js .reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.2, 0.7, 0.2, 1);
}
.js .reveal.in { opacity: 1; transform: none; }

/* ---------------- 响应式 ---------------- */
@media (max-width: 1080px) {
  .hero-grid { grid-template-columns: 1fr; gap: 46px; }
  .sys-card { max-width: 560px; }
  .work-card { grid-template-columns: 1fr; }
  .work-card.reverse .work-media { order: 0; }
  .work-media { min-height: 360px; }
  .work-body { padding: 34px 32px 38px; }
  .notes-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 860px) {
  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 10px 28px 20px;
    background: rgba(8, 13, 24, 0.98);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }
  .nav-links a { width: 100%; padding: 13px 0; border-bottom: 1px solid rgba(255, 255, 255, 0.06); }
  .nav-links a.active::after { display: none; }
  body.nav-open .nav-links { display: flex; }
  .nav-toggle { display: block; }
  .nav-gh { display: none; }
  .brand-text em { display: none; }
  .hero { padding: calc(var(--nav-h) + 58px) 0 78px; }
  .section { padding: 74px 0; }
  .section-head { flex-direction: column; align-items: flex-start; gap: 18px; }
  .notes-grid { grid-template-columns: 1fr; }
  .note-card { min-height: 0; }
  .footer-card { flex-direction: column; align-items: flex-start; padding: 34px 30px; }
}

@media (max-width: 620px) {
  .container { padding: 0 20px; }
  .nav-inner { padding: 0 20px; }
  .nav-cta { display: none; }
  .hero h1 { font-size: clamp(36px, 10vw, 46px); }
  .hero-lede { font-size: 14.5px; }
  .hero-stats { gap: 24px; }
  .hero-stats b { font-size: 21px; }
  .sys-flow { grid-template-columns: 1fr; gap: 8px; }
  .sys-link { height: 22px; }
  .sys-link::before { left: 50%; right: auto; top: 2px; bottom: 2px; border-top: 0; border-left: 1px dashed rgba(120, 160, 255, 0.34); }
  .work-media { padding: 22px; min-height: 320px; }
  .work-body { padding: 28px 22px 32px; }
  .work-body h3 { font-size: 24px; }
  .work-actions .btn { flex: 1 1 auto; }
  .shot img { height: 220px; }
  .shot-sub img { height: 136px; }
  .shot-sub { width: 60%; }
  .skill-row { grid-template-columns: 1fr; gap: 6px; }
  .footer-meta { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  .js .reveal { opacity: 1; transform: none; }
}

/* =========================================================
   2026-10-26 视觉升级：极光 / 打字机 / 跑马灯 / 实时日志
   ========================================================= */

/* 首屏极光：缓慢漂移的光斑 */
.hero-aurora {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}
.hero-aurora i {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.55;
}
.hero-aurora .a1 {
  width: 480px; height: 480px;
  left: -8%; top: -22%;
  background: radial-gradient(circle, rgba(47, 107, 255, 0.34), transparent 68%);
  animation: aurora-a 16s ease-in-out infinite alternate;
}
.hero-aurora .a2 {
  width: 420px; height: 420px;
  right: -6%; top: -10%;
  background: radial-gradient(circle, rgba(43, 217, 193, 0.20), transparent 68%);
  animation: aurora-b 20s ease-in-out infinite alternate;
}
.hero-aurora .a3 {
  width: 380px; height: 380px;
  left: 38%; bottom: -34%;
  background: radial-gradient(circle, rgba(112, 76, 255, 0.16), transparent 68%);
  animation: aurora-c 24s ease-in-out infinite alternate;
}
@keyframes aurora-a { to { transform: translate(9%, 14%) scale(1.12); } }
@keyframes aurora-b { to { transform: translate(-11%, 18%) scale(0.92); } }
@keyframes aurora-c { to { transform: translate(-14%, -10%) scale(1.1); } }

/* 鼠标跟随辉光（仅精确指针设备由 JS 开启） */
.hero-glow {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.4s ease;
}
.hero-glow.on { opacity: 1; }
.hero-glow::before {
  content: "";
  position: absolute;
  width: 560px;
  height: 560px;
  left: var(--mx, 70%);
  top: var(--my, 28%);
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(88, 138, 255, 0.13), transparent 62%);
}

/* 打字机角色行 */
.hero-roles {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-top: 16px;
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: #8fb2ff;
  min-height: 20px;
}
.hero-roles .roles-label { color: var(--cyan); font-weight: 700; }
.hero-roles .caret {
  width: 7px;
  height: 15px;
  background: var(--cyan);
  animation: caret-blink 1s steps(1) infinite;
}
@keyframes caret-blink { 50% { opacity: 0; } }

/* 技术栈跑马灯 */
.stack-strip {
  position: relative;
  overflow: hidden;
  padding: 18px 0;
  background: var(--ink-2);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.stack-strip::before,
.stack-strip::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  width: 90px;
  z-index: 2;
  pointer-events: none;
}
.stack-strip::before { left: 0; background: linear-gradient(90deg, var(--ink-2), transparent); }
.stack-strip::after { right: 0; background: linear-gradient(-90deg, var(--ink-2), transparent); }
.stack-track {
  display: flex;
  gap: 34px;
  width: max-content;
  animation: marquee 36s linear infinite;
}
.stack-strip:hover .stack-track { animation-play-state: paused; }
.stack-track span {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: #7c8da8;
  white-space: nowrap;
}
.stack-track span::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 1px;
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  transform: rotate(45deg);
}
@keyframes marquee { to { transform: translateX(-50%); } }

/* 系统卡实时日志 */
.sys-log {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid rgba(84, 225, 166, 0.16);
  background: rgba(5, 10, 18, 0.55);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.03em;
  color: #74e9b5;
  overflow: hidden;
}
.sys-log i {
  flex: none;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px rgba(84, 225, 166, 0.8);
  animation: pulse 2.2s ease-out infinite;
}
.sys-log span {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: opacity 0.25s ease, transform 0.25s ease;
}
.sys-log span.fade { opacity: 0; transform: translateY(4px); }

/* 卡片顶部长条渐变 */
.work-card { position: relative; }
.work-card::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  height: 3px;
  width: 100%;
  background: linear-gradient(90deg, var(--blue), var(--cyan));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s cubic-bezier(0.2, 0.7, 0.2, 1);
  z-index: 2;
}
.work-card:hover::after { transform: scaleX(1); }

/* 博客卡左侧强调线 */
.note-card { position: relative; overflow: hidden; }
.note-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--blue), var(--cyan));
  opacity: 0;
  transition: opacity 0.25s ease;
}
.note-card:hover::before { opacity: 1; }

/* 关于区工程证据：滚动命令行终端 */
.proof-wrap {
  margin-top: 52px;
  padding-top: 38px;
  border-top: 1px solid var(--line);
}
.proof-eyebrow {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  color: #7d8a9d;
  text-transform: uppercase;
}
.cli {
  margin-top: 18px;
  border-radius: 14px;
  border: 1px solid rgba(120, 160, 255, 0.20);
  background: linear-gradient(170deg, #0d1626, #080e1a);
  box-shadow: 0 18px 44px rgba(8, 13, 24, 0.16), inset 0 1px 0 rgba(255, 255, 255, 0.05);
  overflow: hidden;
}
.cli-head {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  background: rgba(255, 255, 255, 0.025);
}
.cli-head i {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #28324a;
}
.cli-head i:first-child { background: #ff5f57; }
.cli-head i:nth-child(2) { background: #febc2e; }
.cli-head i:nth-child(3) { background: #28c840; }
.cli-head span {
  margin-left: 8px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: #5f7394;
}
.cli-body {
  height: 104px; /* 3 行 × 26px + 上下 padding */
  padding: 13px 18px;
  overflow: hidden;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 2.08;
}
.cli-line {
  display: block;
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: margin-top 0.3s ease, opacity 0.3s ease;
}
.cli-line.out { opacity: 0; }
.cli-line.enter { animation: cli-in 0.35s ease; }
@keyframes cli-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}
.cli-p { color: var(--cyan); font-weight: 700; }
.cli-c { color: #e8eef9; }
.cli-r { color: #74e9b5; }

/* 技能行 hover */
.skill-row { transition: background 0.2s ease; }
.skill-row:hover { background: #fafcff; }

/* 导航头像：复用 brand-mark 尺寸，圆形改方形圆角裁剪 */
.brand-avatar { background: none; overflow: hidden; }
.brand-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

@media (max-width: 620px) {
  .hero-roles { font-size: 11px; }
  .stack-track { gap: 24px; animation-duration: 28s; }
  .cli-body { font-size: 10.5px; padding: 12px 14px; height: 90px; }
}