/* ============================================================
   贾同斌个人主页 — 深色 / 霓虹渐变 / 等宽字体细节 / 发光描边卡片 / 网格背景
   纯静态，无外部 CDN，字体走系统栈
   ============================================================ */

:root {
  --color-bg: #07090c;
  --color-surface: #0d1117;
  --color-text: #e8f0ea;
  --color-muted: #93a89b;
  --color-accent: #4ade80;
  --color-accent-2: #22d3ee;
  --color-border: rgba(232, 240, 234, 0.10);
  --grad-neon: linear-gradient(120deg, #4ade80, #22d3ee);

  /* 系统字体栈：中文黑体 + 等宽细节 */
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-display: "Songti SC", "Noto Serif SC", "SimSun", serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Mono", Consolas, "Courier New", monospace;

  --step--1: 0.8rem;
  --step-0: 1rem;
  --step-1: 1.2rem;
  --step-4: clamp(2.1rem, 7vw, 4.2rem);

  --space-2: 8px; --space-3: 16px; --space-4: 24px;
  --space-5: 40px; --space-6: 64px; --space-7: 96px;

  --radius-md: 14px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-base: 340ms;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.8;
  letter-spacing: 0.02em;
  overflow-x: hidden;
}

::selection { background: var(--color-accent); color: #04120a; }
a { color: inherit; text-decoration: none; }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 3px; border-radius: 2px; }

.skip-link {
  position: absolute; left: -999px; top: 0;
  background: var(--color-accent); color: #04120a;
  padding: 8px 16px; z-index: 99; font-family: var(--font-mono);
}
.skip-link:focus { left: 8px; top: 8px; }

/* ---------- 氛围层：渐变光晕 / 网格 / 噪点 ---------- */
.atmosphere::before {
  content: ""; position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(55rem 36rem at 8% -8%, rgba(74, 222, 128, 0.10), transparent 60%),
    radial-gradient(48rem 36rem at 105% 12%, rgba(34, 211, 238, 0.08), transparent 55%);
}
.grid-bg::before {
  content: ""; position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(74, 222, 128, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(74, 222, 128, 0.05) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, #000 30%, transparent 78%);
  mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, #000 30%, transparent 78%);
}
.grain::after {
  content: ""; position: fixed; inset: 0; z-index: 1; pointer-events: none; opacity: .05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

main, header, footer { position: relative; z-index: 2; }
.wrap { max-width: 1080px; margin: 0 auto; padding-left: var(--space-4); padding-right: var(--space-4); }

/* ---------- 等宽字体细节 ---------- */
.mono {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: 0.1em;
  color: var(--color-muted);
  text-transform: uppercase;
}
.mono .slash { color: var(--color-accent); }

/* ---------- 顶栏 ---------- */
.topbar {
  display: flex; justify-content: space-between; align-items: center; gap: var(--space-3);
  padding-top: var(--space-4); padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}
.logo { font-family: var(--font-mono); font-weight: 700; letter-spacing: 0.06em; }
.logo em { font-style: normal; color: var(--color-accent); }

/* ---------- 首屏 ---------- */
.hero { padding: var(--space-6) 0 var(--space-6); }
.hero-grid { display: grid; gap: var(--space-5); align-items: start; margin-top: var(--space-4); }
@media (min-width: 860px) {
  .hero-grid { grid-template-columns: 1.5fr 1fr; gap: var(--space-6); }
}

h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--step-4);
  line-height: 1.2;
  letter-spacing: 0.01em;
  margin: var(--space-3) 0 var(--space-4);
}
/* 标题逐行遮罩：GSAP stagger 入场用 */
.h-mask { display: block; overflow: hidden; }
.h-line { display: block; will-change: transform; }
.neon {
  background: var(--grad-neon);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.lede { max-width: 34em; color: var(--color-muted); font-size: var(--step-1); line-height: 1.85; }

.hero-tags { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-top: var(--space-4); }
.tag {
  font-family: var(--font-mono); font-size: var(--step--1); letter-spacing: 0.06em;
  padding: 7px 14px; border: 1px solid var(--color-border); border-radius: 999px;
  color: var(--color-text); background: rgba(13, 17, 23, 0.7);
}
.tag:hover { border-color: var(--color-accent); }

/* 头像：四角括号 + 发光描边 */
.hero-photo { justify-self: center; }
@media (min-width: 860px) { .hero-photo { justify-self: end; } }
.photo-frame {
  position: relative; width: min(240px, 60vw); aspect-ratio: 1;
  border: 1px solid rgba(74, 222, 128, 0.4); border-radius: var(--radius-md);
  box-shadow: 0 0 24px rgba(74, 222, 128, 0.18), 0 0 64px rgba(34, 211, 238, 0.08);
  overflow: hidden; background: var(--color-surface);
}
.photo-frame img { width: 100%; height: 100%; object-fit: cover; object-position: center 22%; display: block; }
.photo-fallback {
  width: 100%; height: 100%; align-items: center; justify-content: center;
  font-family: var(--font-display); font-size: 5rem; font-weight: 900;
  background: linear-gradient(135deg, rgba(74,222,128,.16), rgba(34,211,238,.12));
  color: var(--color-accent);
}
.corner { position: absolute; width: 14px; height: 14px; border: 2px solid var(--color-accent); }
.corner.tl { top: 6px; left: 6px; border-right: 0; border-bottom: 0; }
.corner.tr { top: 6px; right: 6px; border-left: 0; border-bottom: 0; }
.corner.bl { bottom: 6px; left: 6px; border-right: 0; border-top: 0; }
.corner.br { bottom: 6px; right: 6px; border-left: 0; border-top: 0; }
.photo-cap { margin-top: var(--space-3); text-align: center; }

/* ---------- 区块 ---------- */
.section { padding: var(--space-5) 0; }
.sec-title {
  display: flex; align-items: baseline; gap: var(--space-3);
  font-size: 1.4rem; font-weight: 700; margin-bottom: var(--space-4);
}
.sec-no { color: var(--color-accent); }

/* ---------- 发光描边卡片 ---------- */
.card {
  background: linear-gradient(180deg, rgba(17, 22, 29, 0.9), rgba(13, 17, 23, 0.9));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}
.glow-card {
  position: relative;
  box-shadow: 0 0 0 1px transparent, 0 2px 8px rgba(0,0,0,.3);
  transition: border-color var(--dur-base) var(--ease-out), box-shadow var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out);
}
.glow-card:hover {
  border-color: rgba(74, 222, 128, 0.55);
  box-shadow: 0 0 20px rgba(74, 222, 128, 0.14), 0 8px 28px rgba(0, 0, 0, 0.4);
  transform: translateY(-3px);
}

/* ---------- 关于我 ---------- */
.about p + p { margin-top: var(--space-3); }
.about strong { font-weight: 700; }

/* ---------- 技能标签 ---------- */
.skill-list { display: flex; flex-wrap: wrap; gap: var(--space-2); list-style: none; }
.chip {
  font-family: var(--font-mono); font-size: 0.9rem; letter-spacing: 0.04em;
  padding: 10px 18px; border: 1px solid var(--color-border); border-radius: var(--radius-md);
  background: rgba(13, 17, 23, 0.7);
  transition: border-color 160ms ease-out, color 160ms ease-out;
}
.chip:hover { border-color: var(--color-accent); color: var(--color-accent); }

/* ---------- 项目与经历：pin + 横向画廊 ---------- */
.hscroll { padding: var(--space-5) 0; }
.hscroll-head {
  display: flex; align-items: baseline; justify-content: space-between; gap: var(--space-3);
}
.hscroll-hint { flex-shrink: 0; }
.hscroll-viewport {
  /* 无 JS / 减少动效时的兜底：原生横向滚动 */
  overflow-x: auto;
  scrollbar-width: thin;
}
.hscroll.is-animated .hscroll-viewport { overflow: visible; }
.hscroll-track {
  display: flex; gap: var(--space-4);
  width: max-content;
  padding: var(--space-4) var(--space-4) var(--space-4);
}
.panel {
  flex-shrink: 0;
  width: min(420px, 78vw);
  will-change: transform;
}
.work h3 { font-size: 1.15rem; font-weight: 700; margin: var(--space-2) 0 4px; }
.work-sub { color: var(--color-muted); font-size: 0.92rem; margin-bottom: var(--space-2); }
.work-result { margin-top: var(--space-2); }
.work .num {
  font-family: var(--font-mono); font-weight: 700; font-size: 1.3em;
  color: var(--color-accent);
}
.todo {
  color: #f0b429 !important;
  border: 1px dashed rgba(240, 180, 41, 0.5);
  display: inline-block; padding: 2px 10px; border-radius: 6px; margin-top: var(--space-3);
}

/* ---------- 我的数字 ---------- */
.stats-grid { display: grid; gap: var(--space-3); }
@media (min-width: 560px) { .stats-grid { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 900px) { .stats-grid { grid-template-columns: repeat(3, 1fr); } }
.stat-num {
  font-family: var(--font-mono); font-weight: 700;
  font-size: clamp(1.9rem, 5vw, 2.6rem); line-height: 1.1;
  margin: var(--space-2) 0 6px;
  background: var(--grad-neon);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.stat-num small { font-size: 0.55em; margin: 0 2px; }
.stat-num .unit { font-size: 0.45em; margin-left: 4px; }
.stat-desc { color: var(--color-muted); font-size: 0.88rem; }

/* ---------- 联系方式 ---------- */
.contact-grid { display: grid; gap: var(--space-3); }
@media (min-width: 520px) { .contact-grid { grid-template-columns: 1fr 1fr; } }
.contact-val { font-size: 1.15rem; font-weight: 700; margin-top: var(--space-2); }

/* ---------- 页脚 ---------- */
.footer {
  display: flex; flex-wrap: wrap; gap: var(--space-2); justify-content: space-between;
  padding-top: var(--space-5); padding-bottom: var(--space-5);
  border-top: 1px solid var(--color-border); margin-top: var(--space-5);
}

/* ---------- 入场动效（克制：只动 opacity / translateY） ---------- */
.reveal { opacity: 1; }
@media (prefers-reduced-motion: no-preference) {
  .reveal { opacity: 0; transform: translateY(18px); }
  .reveal.in {
    opacity: 1; transform: none;
    transition: opacity var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out);
  }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .glow-card, .chip, .tag { transition: none; }
}