/* ============================================
   郝博 · 拾光 — Poly Editorial Style
   Ember on porcelain：一个渐变火种 + 纯白编辑页
   ============================================ */

:root {
  /* Colors */
  --color-porcelain: #f4f4f4;
  --color-onyx: #000000;
  --color-graphite: #292930;
  --color-ash: #cccccc;
  --gradient-ember: linear-gradient(134.77deg, #f4824d 25.1%, #f42919 74.9%);

  /* Typography */
  --font-serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", "STSong", "SimSun", serif;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;

  /* Type scale (from spec) */
  --text-caption: 12px;
  --text-body-sm: 15px;
  --text-subheading: 24px;
  --text-heading-sm: 30px;
  --text-heading-lg: 45px;
  --text-display: 53px;

  /* Spacing */
  --spacing-6: 6px;
  --spacing-12: 12px;
  --spacing-18: 18px;
  --spacing-24: 24px;
  --spacing-30: 30px;
  --spacing-48: 48px;
  --spacing-69: 69px;

  /* Layout */
  --page-max-width: 1200px;
  --card-padding: 24px;

  /* Radius */
  --radius: 8px;
}

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

body {
  font-family: var(--font-sans);
  font-size: var(--text-body-sm);
  line-height: 1.5;
  letter-spacing: -0.02em;
  background: var(--color-porcelain);
  color: var(--color-graphite);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3 {
  font-family: var(--font-serif);
  font-weight: 400;          /* 450 的反常规轻衬线，中文宋体 400 对应 */
  letter-spacing: -0.02em;
  color: var(--color-onyx);
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

/* ============ 顶部导航 ============ */
.topnav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: transparent;
  transition: background 0.3s;
  padding: var(--spacing-24) 0;
}
.topnav.scrolled {
  background: var(--color-porcelain);
  border-bottom: 1px solid var(--color-graphite);
  padding: var(--spacing-12) 0;
}
.nav-inner {
  max-width: var(--page-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-24);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-brand { display: flex; align-items: center; gap: 10px; }
.brand-cube {
  width: 20px; height: 20px;
  border-radius: var(--radius);
  background: var(--gradient-ember);
  display: inline-block;
}
.nav-brand .brand-word {
  font-family: var(--font-serif);
  font-size: var(--text-subheading);
  color: var(--color-porcelain);
  transition: color 0.3s;
}
.topnav.scrolled .nav-brand .brand-word { color: var(--color-onyx); }
.nav-links { display: flex; gap: var(--spacing-30); }
.nav-links a {
  font-size: var(--text-body-sm);
  color: var(--color-porcelain);
  transition: color 0.3s, opacity 0.3s;
}
.topnav.scrolled .nav-links a { color: var(--color-graphite); }
.nav-links a:hover { opacity: 0.6; }

/* ============ HERO：全出血摄影 ============ */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);  /* 45% Onyx overlay */
}
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: var(--color-porcelain);
  padding: 0 var(--spacing-24);
  max-width: 760px;
}
.hero-badge {
  font-size: var(--text-caption);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-porcelain);
  opacity: 0.8;
  margin-bottom: var(--spacing-18);
}
.hero-name {
  font-size: var(--text-display);
  line-height: 1.1;
  letter-spacing: -1.06px;
  color: var(--color-porcelain);
  margin-bottom: var(--spacing-12);
}
.hero-sub {
  font-size: var(--text-subheading);
  color: var(--color-porcelain);
  opacity: 0.9;
  letter-spacing: 0.25em;
  margin-bottom: var(--spacing-12);
}
.hero-line {
  font-size: var(--text-body-sm);
  color: var(--color-porcelain);
  opacity: 0.8;
  max-width: 480px;
  margin: 0 auto var(--spacing-24);
}
.hero-stickers {
  display: flex;
  justify-content: center;
  gap: var(--spacing-12);
  margin-bottom: var(--spacing-30);
  flex-wrap: wrap;
}
.sticker {
  font-size: var(--text-caption);
  color: var(--color-porcelain);
  border: 1px solid rgba(244, 244, 244, 0.6);
  border-radius: var(--radius);
  padding: var(--spacing-6) var(--spacing-12);
  letter-spacing: 0.05em;
}
.hero-cta { display: flex; gap: var(--spacing-12); justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-block;
  padding: var(--spacing-12) var(--spacing-24);
  font-family: var(--font-sans);
  font-size: var(--text-body-sm);
  font-weight: 600;
  border-radius: var(--radius);
  letter-spacing: -0.02em;
  transition: opacity 0.2s, transform 0.2s;
}
.btn:hover { opacity: 0.85; transform: translateY(-1px); }
.btn-dark {
  background: var(--color-onyx);
  color: var(--color-porcelain);
}
.btn-ghost {
  background: transparent;
  color: var(--color-porcelain);
  border: 1.5px solid var(--color-porcelain);
}

/* ============ 章节通用 ============ */
.section {
  max-width: var(--page-max-width);
  margin: 0 auto;
  padding: var(--spacing-69) var(--spacing-24);
}
.section-head {
  text-align: center;
  margin-bottom: var(--spacing-48);
}
.section-title {
  font-size: var(--text-heading-lg);
  line-height: 1.1;
  letter-spacing: -0.9px;
}
.section-sub {
  font-size: var(--text-body-sm);
  color: var(--color-graphite);
  opacity: 0.65;
  margin-top: var(--spacing-12);
  letter-spacing: 0.02em;
}

/* ============ 故事章节 ============ */
.chapter {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: var(--spacing-48);
  padding: var(--spacing-48) 0;
  border-top: 1px solid var(--color-graphite);
}
.chapter:first-of-type { border-top: none; }
.chapter-meta {
  padding-top: var(--spacing-6);
}
.chapter-no {
  display: block;
  font-family: var(--font-serif);
  font-size: var(--text-heading-sm);
  color: var(--color-onyx);
  margin-bottom: var(--spacing-6);
}
.chapter-place {
  font-size: var(--text-caption);
  color: var(--color-graphite);
  opacity: 0.6;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.chapter-title {
  font-size: var(--text-subheading);
  margin-bottom: var(--spacing-18);
}
.chapter-text p {
  margin-bottom: var(--spacing-18);
  text-indent: 2em;
  max-width: 680px;  /* readable measure */
  color: var(--color-graphite);
}
.chapter-text p:last-child { margin-bottom: 0; }
.chapter-text p:first-child {
  text-indent: 0;
  font-weight: 600;
  font-size: 1.05em;
}

/* 照片带 — 全出血杂志节奏 */
.photo-band {
  width: 100vw;
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);
}
.photo-band img {
  width: 100%;
  height: 420px;
  object-fit: cover;
}
.photo-band-full img { height: 480px; }

/* ============ 简历 ============ */
.resume { max-width: 900px; }
.resume-block { margin-bottom: var(--spacing-48); }
.block-title {
  font-size: var(--text-subheading);
  margin-bottom: var(--spacing-24);
  padding-bottom: var(--spacing-12);
  border-bottom: 1px solid var(--color-graphite);
}

.card {
  background: var(--color-porcelain);
  border: 1px solid var(--color-graphite);
  border-radius: var(--radius);
  padding: var(--card-padding);
}

.edu-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-18); }
.edu-school { font-size: 1.2em; font-family: var(--font-serif); margin-bottom: 4px; }
.badge {
  font-size: 11px;
  font-family: var(--font-sans);
  border: 1px solid var(--color-graphite);
  border-radius: var(--radius);
  padding: 1px 7px;
  vertical-align: 2px;
  font-weight: 400;
  letter-spacing: 0.05em;
}
.edu-major { color: var(--color-graphite); opacity: 0.8; margin-bottom: 4px; }
.edu-time { font-size: var(--text-caption); color: var(--color-graphite); opacity: 0.6; margin-bottom: var(--spacing-12); }
.edu-detail { font-size: var(--text-body-sm); color: var(--color-graphite); margin-bottom: var(--spacing-12); }
.edu-gpa {
  font-size: var(--text-body-sm);
  font-weight: 600;
  color: var(--color-onyx);
}

.exp-list { display: flex; flex-direction: column; gap: var(--spacing-12); }
.exp-item { transition: background 0.2s; }
.exp-item:hover { background: #ececec; }
.exp-head { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: var(--spacing-6); }
.exp-role { font-family: var(--font-serif); font-size: 1.05em; font-weight: 600; }
.exp-time { font-size: var(--text-caption); color: var(--color-graphite); opacity: 0.6; white-space: nowrap; }
.exp-org { font-size: var(--text-caption); letter-spacing: 0.08em; text-transform: uppercase; opacity: 0.6; margin: 2px 0 var(--spacing-6); }
.exp-desc { font-size: var(--text-body-sm); color: var(--color-graphite); max-width: 680px; }

.skills-flex { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--spacing-12); }
.skill-name { font-family: var(--font-serif); font-size: 1.1em; margin-bottom: var(--spacing-6); }
.skill-desc { font-size: var(--text-body-sm); color: var(--color-graphite); }

/* ============ 照片墙 ============ */
.photo-tabs {
  display: flex;
  justify-content: center;
  gap: var(--spacing-12);
  margin-bottom: var(--spacing-30);
}
.tab-btn {
  font-family: var(--font-sans);
  font-size: var(--text-body-sm);
  padding: var(--spacing-9) var(--spacing-24);
  border-radius: var(--radius);
  border: 1px solid var(--color-graphite);
  background: transparent;
  color: var(--color-graphite);
  cursor: pointer;
  letter-spacing: -0.02em;
  transition: all 0.2s;
}
.tab-btn:hover { background: #ececec; }
.tab-btn.active {
  background: var(--color-onyx);
  color: var(--color-porcelain);
  border-color: var(--color-onyx);
}
.tab-count { font-size: var(--text-caption); opacity: 0.6; margin-left: 4px; }

.photo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--spacing-12);
}
.photo-item {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-graphite);
  background: #ececec;
  cursor: zoom-in;
  transition: transform 0.25s;
}
.photo-item:hover { transform: scale(1.02); }
.photo-item img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  display: block;
  transition: transform 0.4s;
}
.photo-item:hover img { transform: scale(1.04); }
.photo-note {
  text-align: center;
  font-size: var(--text-caption);
  color: var(--color-graphite);
  opacity: 0.5;
  margin-top: var(--spacing-24);
  letter-spacing: 0.1em;
}

/* ============ 联系 ============ */
.contact { max-width: 900px; }
.contact-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--spacing-12); }
.contact-card { text-align: center; transition: background 0.2s; }
.contact-card:hover { background: #ececec; }
.contact-icon {
  font-family: var(--font-serif);
  font-size: var(--text-subheading);
  margin-bottom: var(--spacing-6);
}
.contact-value {
  font-size: 1.05em;
  font-weight: 600;
  word-break: break-all;
  letter-spacing: 0;
}

/* ============ 页脚 ============ */
.footer {
  border-top: 1px solid var(--color-graphite);
  padding: var(--spacing-48) var(--spacing-24);
}
.footer-inner {
  max-width: var(--page-max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: var(--spacing-12);
}
.footer .brand-word {
  font-family: var(--font-serif);
  font-size: var(--text-subheading);
  color: var(--color-onyx);
}
.footer-quote {
  margin-left: auto;
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--color-graphite);
  opacity: 0.6;
}

/* ============ 灯箱 ============ */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s;
}
.lightbox.open { opacity: 1; pointer-events: auto; }
.lightbox img {
  max-width: min(92vw, 1000px);
  max-height: 88vh;
  border-radius: var(--radius);
  transform: scale(0.96);
  transition: transform 0.25s;
}
.lightbox.open img { transform: scale(1); }
.lightbox-close {
  position: absolute;
  top: 22px; right: 26px;
  width: 44px; height: 44px;
  border-radius: var(--radius);
  border: 1px solid var(--color-porcelain);
  background: transparent;
  color: var(--color-porcelain);
  font-size: 1.1rem;
  cursor: pointer;
  transition: background 0.2s;
}
.lightbox-close:hover { background: rgba(255, 255, 255, 0.15); }

/* ============ 滚动淡入 ============ */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ============ 响应式 ============ */
@media (max-width: 760px) {
  .hero { min-height: 80vh; }
  .hero-name { font-size: 40px; }
  .chapter { grid-template-columns: 1fr; gap: var(--spacing-12); }
  .chapter-meta { display: flex; gap: var(--spacing-12); align-items: baseline; }
  .chapter-no { font-size: var(--text-subheading); margin-bottom: 0; }
  .edu-grid, .skills-flex, .contact-cards { grid-template-columns: 1fr; }
  .photo-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
  .photo-band img, .photo-band-full img { height: 260px; }
  .nav-links { gap: var(--spacing-18); }
  .footer-quote { margin-left: 0; }
}