/* ========== Base ========== */
body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  color: var(--text-primary);
  background: radial-gradient(ellipse 80% 60% at 50% 0%, var(--bg-soft) 0%, var(--bg-base) 40%, var(--bg-deep) 100%);
  background-attachment: fixed;
  position: relative;
  font-feature-settings: "ss01", "cv11";
}

.bg-noise {
  position: fixed; inset: 0; width: 100%; height: 100%;
  pointer-events: none; z-index: var(--z-bg);
  opacity: 0.6;
}

.bg-orbs {
  position: fixed; inset: 0;
  pointer-events: none; z-index: 0;
  overflow: hidden;
}
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.3;
  will-change: transform;
}
.orb-1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, var(--accent-liepin) 0%, transparent 70%);
  top: -200px; right: -150px;
  animation: orbDrift 24s ease-in-out infinite;
}
.orb-2 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, var(--accent-guanxin) 0%, transparent 70%);
  top: 50%; left: -200px;
  animation: orbDrift 30s ease-in-out infinite reverse;
}
.orb-3 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, var(--accent-tencent) 0%, transparent 70%);
  bottom: -150px; right: 20%;
  animation: orbDrift 28s ease-in-out infinite;
  animation-delay: -8s;
}

main { position: relative; z-index: var(--z-content); }

[data-reveal] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out);
}
[data-reveal].is-revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ========== Nav ========== */
.nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: var(--z-nav);
  padding: 20px 0;
  background: linear-gradient(to bottom, rgba(13, 18, 25, 0.85), rgba(13, 18, 25, 0));
  backdrop-filter: blur(0px);
  transition: background var(--dur) var(--ease-out), backdrop-filter var(--dur) var(--ease-out), padding var(--dur) var(--ease-out);
}
.nav.is-scrolled {
  background: rgba(13, 18, 25, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-soft);
  padding: 14px 0;
}
.nav-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}
.nav-brand {
  font-family: var(--font-display);
  font-size: 24px;
  letter-spacing: 0.04em;
  color: var(--text-primary);
  font-weight: 700;
  font-style: italic;
  position: relative;
  transition: color var(--dur) var(--ease-out);
}
.nav-brand::after {
  content: ''; position: absolute; left: 0; bottom: -4px;
  width: 100%; height: 2px; background: var(--accent-guanxin);
  transform: scaleX(0); transform-origin: right;
  transition: transform var(--dur) var(--ease-out);
}
.nav-brand:hover::after { transform: scaleX(1); transform-origin: left; }

.nav-links { display: flex; gap: 8px; align-items: center; }
.nav-links a {
  position: relative;
  padding: 8px 14px;
  font-size: var(--fs-small);
  color: var(--text-secondary);
  font-weight: 500;
  transition: color var(--dur) var(--ease-out);
  border-radius: var(--radius-sm);
}
.nav-links a::after {
  content: ''; position: absolute; left: 14px; right: 14px; bottom: 4px;
  height: 1px; background: currentColor;
  transform: scaleX(0); transform-origin: left;
  transition: transform var(--dur) var(--ease-out);
}
.nav-links a:hover { color: var(--text-primary); }
.nav-links a:hover::after,
.nav-links a.is-active::after { transform: scaleX(1); }
.nav-links a.is-active { color: var(--text-primary); }

.nav-toggle {
  display: none;
  width: 32px; height: 32px;
  flex-direction: column; justify-content: center; align-items: center;
  gap: 5px;
}
.nav-toggle span {
  display: block; width: 22px; height: 1.5px;
  background: var(--text-primary);
  transition: transform var(--dur) var(--ease-out), opacity var(--dur) var(--ease-out);
}

@media (max-width: 720px) {
  .nav-toggle { display: flex; }
  /* 下拉浮层：绝对定位于 .nav（避免 backdrop-filter 形成包含块导致 fixed 错位） */
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(13, 18, 25, 0.96);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    padding: 10px 24px calc(24px + env(safe-area-inset-bottom));
    border-bottom: 1px solid var(--border-soft);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.45);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-10px);
    transition:
      opacity var(--dur) var(--ease-out),
      transform var(--dur) var(--ease-out),
      visibility 0s linear var(--dur);
  }
  .nav-links.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
    transition:
      opacity var(--dur) var(--ease-out),
      transform var(--dur) var(--ease-out),
      visibility 0s;
  }
  .nav-links a {
    width: 100%;
    padding: 20px 0;
    font-size: 15px;
    border-bottom: 1px solid var(--border-soft);
  }
  .nav-links li:last-child a { border-bottom: none; }
  /* 汉堡按钮 → X：兼容部分 WebView（如微信）中线 opacity 过渡异常，中间横杠直接隐藏 */
  .nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
    visibility: hidden;
    transform: scaleX(0);
    transition: none;
  }
  .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }
}

/* ========== Hero ========== */
.hero {
  min-height: 100vh;
  min-height: 100svh;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px var(--container-padding) 80px;
  overflow: hidden;
}
.hero-bg-text {
  position: absolute; left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-display);
  font-size: clamp(200px, 32vw, 480px);
  font-weight: 700;
  font-style: italic;
  letter-spacing: -0.02em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(156, 168, 184, 0.08);
  text-stroke: 1px rgba(156, 168, 184, 0.08);
  white-space: nowrap;
  z-index: 0;
  user-select: none;
  pointer-events: none;
}
.hero-content {
  position: relative; z-index: 1;
  text-align: center;
  max-width: 900px;
}
.hero-eyebrow {
  font-family: var(--font-body);
  font-size: var(--fs-small);
  letter-spacing: 0.4em;
  color: var(--accent-liepin);
  font-weight: 600;
  margin-bottom: var(--space-md);
  animation: fadeIn 0.8s var(--ease-out) 0.1s both;
}
.hero-title {
  font-family: var(--font-display);
  font-size: var(--fs-hero);
  font-weight: 700;
  font-style: italic;
  letter-spacing: 0.02em;
  line-height: 0.95;
  margin: 0;
  position: relative;
  color: var(--text-primary);
  display: inline-block;
}
.hero-title-main {
  position: relative; z-index: 2;
  display: inline-block;
  animation: titleRise 1s var(--ease-out) 0.2s both;
}
.hero-title-shadow {
  position: absolute; left: 8px; top: 8px;
  z-index: 1;
  color: var(--accent-liepin);
  opacity: 0.4;
  animation: titleShadow 1s var(--ease-out) 0.5s both;
}
.hero-subtitle {
  margin-top: var(--space-md);
  font-size: clamp(18px, 2vw, 24px);
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
  animation: fadeInUp 0.8s var(--ease-out) 0.6s both;
}
.hero-subtitle .dot { margin: 0 12px; color: var(--text-muted); }
.hero-subtitle .zh { font-family: var(--font-cn); }
.hero-subtitle .en { font-style: italic; }

.hero-meta {
  margin-top: var(--space-lg);
  display: flex; flex-wrap: wrap; gap: 12px;
  justify-content: center;
  animation: fadeInUp 0.8s var(--ease-out) 0.8s both;
}
.hero-meta li {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 10px 18px;
  background: var(--bg-glass);
  border: 1px solid var(--border-soft);
  border-radius: 999px;
  font-size: var(--fs-small);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: border-color var(--dur) var(--ease-out), transform var(--dur) var(--ease-out);
}
.hero-meta li:hover { border-color: var(--border-hover); transform: translateY(-2px); }
.hero-meta a { color: var(--text-primary); }
.hero-meta a:hover { color: var(--accent-liepin); }
.meta-label {
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--text-muted);
  text-transform: uppercase;
}
.hero-scroll-hint {
  position: absolute; bottom: 30px; left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  font-size: 10px; letter-spacing: 0.4em;
  color: var(--text-muted);
  text-transform: uppercase;
  animation: fadeIn 1s var(--ease-out) 1.5s both;
}
.hero-scroll-hint .line {
  display: block; width: 1px; height: 40px;
  background: var(--text-muted);
  animation: scrollHint 1.8s ease-in-out infinite;
  transform-origin: top;
}

/* ========== Section common ========== */
.section {
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--space-2xl) var(--container-padding);
  position: relative;
}
.section-head {
  margin-bottom: var(--space-xl);
}
.kicker {
  display: inline-block;
  font-size: var(--fs-tiny);
  font-weight: 600;
  letter-spacing: 0.3em;
  color: var(--accent-liepin);
  margin-bottom: var(--space-sm);
  text-transform: uppercase;
}
.section-title {
  font-family: var(--font-display);
  font-size: var(--fs-section);
  font-weight: 700;
  font-style: italic;
  letter-spacing: 0.01em;
  line-height: 1;
  margin: 0;
  color: var(--text-primary);
  display: flex; flex-direction: column; gap: 8px;
}
.section-title .zh { font-family: var(--font-cn); font-style: normal; font-size: 0.55em; color: var(--text-secondary); }
.section-title .en { font-size: 0.55em; color: var(--text-secondary); }
.section-lead {
  margin-top: var(--space-md);
  max-width: 720px;
  color: var(--text-secondary);
  font-size: 17px;
  line-height: 1.7;
}

/* ========== Profile ========== */
.profile-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-xl);
  align-items: start;
}
@media (max-width: 860px) { .profile-grid { grid-template-columns: 1fr; gap: var(--space-lg); } }

.profile-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.stat {
  padding: var(--space-md);
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: border-color var(--dur) var(--ease-out), transform var(--dur) var(--ease-out);
}
.stat:hover { border-color: var(--border-hover); transform: translateY(-4px); }
.stat-num {
  font-family: var(--font-display);
  font-size: 64px;
  font-weight: 700;
  font-style: italic;
  line-height: 1;
  color: var(--accent-liepin);
  margin-bottom: 8px;
}
.stat-num sup { font-size: 0.4em; color: var(--text-secondary); vertical-align: top; margin-left: 10px; }
.stat-label {
  font-size: var(--fs-small);
  color: var(--text-secondary);
  line-height: 1.4;
}
.stat-label span { color: var(--text-muted); font-style: italic; }

.profile-bio p {
  font-size: 17px;
  line-height: 1.85;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
}
.profile-bio p + p { color: var(--text-secondary); }
.profile-tags {
  margin-top: var(--space-md);
  display: flex; flex-wrap: wrap; gap: 8px;
}
.profile-tags li {
  padding: 6px 14px;
  font-size: var(--fs-tiny);
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: 999px;
  color: var(--text-secondary);
  transition: all var(--dur) var(--ease-out);
}
.profile-tags li:hover { color: var(--text-primary); border-color: var(--accent-liepin); transform: translateY(-2px); }

/* ========== Timeline ========== */
.timeline { position: relative; padding-left: 0; }
.timeline-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  position: relative;
}
@media (max-width: 980px) { .timeline-list { grid-template-columns: 1fr; } }

.timeline-item {
  position: relative;
  padding-top: 32px;
}
.timeline-dot {
  position: absolute; top: 0; left: 0;
  width: 16px; height: 16px;
  background: var(--bg-base);
  border: 2px solid var(--accent-liepin);
  border-radius: 50%;
  transform: scale(0);
  transition: transform 0.5s var(--ease-spring);
}
.timeline-dot::before {
  content: ''; position: absolute; inset: -8px;
  border-radius: 50%;
  background: var(--accent-liepin-soft);
  opacity: 0; transform: scale(0.5);
  transition: opacity var(--dur) var(--ease-out), transform var(--dur-slow) var(--ease-out);
}
.timeline-item.is-revealed .timeline-dot { transform: scale(1); }
.timeline-item.is-revealed .timeline-dot::before { opacity: 1; transform: scale(1); }
.timeline-dot-current { background: var(--accent-guanxin); border-color: var(--accent-guanxin); }
.timeline-dot-current::before { background: var(--accent-guanxin-soft); }

.timeline-card {
  padding: var(--space-md);
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  height: 100%;
  transition: transform var(--dur) var(--ease-out), border-color var(--dur) var(--ease-out);
}
.timeline-card:hover { transform: translateY(-4px); border-color: var(--border-hover); }
.timeline-card-current { border-color: var(--accent-guanxin); }
.timeline-card-current:hover { border-color: var(--accent-guanxin); box-shadow: 0 0 0 3px var(--accent-guanxin-soft); }

.timeline-period {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--accent-liepin);
  margin-bottom: 12px;
}
.timeline-org {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}
.timeline-role {
  font-size: var(--fs-small);
  color: var(--text-primary);
  font-weight: 500;
  margin-bottom: var(--space-sm);
}
.timeline-meta {
  font-size: var(--fs-tiny);
  color: var(--text-secondary);
  line-height: 1.6;
  font-style: italic;
}

.timeline-track {
  position: absolute; top: 7px; left: 0; right: 0;
  height: 2px;
  background: var(--border-soft);
  z-index: -1;
}
@media (max-width: 980px) { .timeline-track { display: none; } }
.timeline-track-fill {
  position: absolute; top: 0; left: 0; height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--accent-liepin), var(--accent-guanxin));
  transition: width 0.4s var(--ease-out);
}

/* ========== Abilities ========== */
.abilities-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}
@media (max-width: 860px) { .abilities-grid { grid-template-columns: 1fr; } }

.ability {
  padding: var(--space-lg) var(--space-md);
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  position: relative;
  overflow: hidden;
  transition: transform var(--dur) var(--ease-out), border-color var(--dur) var(--ease-out);
}
.ability::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--accent-liepin);
  transform: scaleX(0); transform-origin: left;
  transition: transform var(--dur-slow) var(--ease-out);
}
.ability:hover { transform: translateY(-6px); border-color: var(--border-hover); }
.ability:hover::before { transform: scaleX(1); }
.ability:nth-child(1)::before { background: var(--accent-liepin); }
.ability:nth-child(2)::before { background: var(--accent-tencent); }
.ability:nth-child(3)::before { background: var(--accent-guanxin); }

.ability-num {
  font-family: var(--font-display);
  font-size: 34px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--accent-liepin);
  margin-bottom: 20px;
  line-height: 1;
}
.ability:nth-child(2) .ability-num { color: var(--accent-tencent); }
.ability:nth-child(3) .ability-num { color: var(--accent-guanxin); }

.ability-title {
  font-family: var(--font-cn);
  font-size: 26px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: var(--space-md);
  color: var(--text-primary);
}
.ability-title span {
  display: block;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 400;
  color: var(--text-muted);
  font-style: italic;
  letter-spacing: 0.05em;
  margin-top: 6px;
}
.ability-list li {
  position: relative;
  padding: 8px 0 8px 24px;
  font-size: var(--fs-small);
  color: var(--text-secondary);
  border-top: 1px solid var(--border-soft);
  transition: color var(--dur) var(--ease-out);
}
.ability-list li::before {
  content: ''; position: absolute; left: 0; top: 16px;
  width: 12px; height: 1px;
  background: var(--text-muted);
  transition: width var(--dur) var(--ease-out), background var(--dur) var(--ease-out);
}
.ability-list li:hover { color: var(--text-primary); }
.ability-list li:hover::before { width: 18px; background: var(--accent-liepin); }

/* ========== Works ========== */
.works { max-width: var(--container); }
.works-tabs-sentinel { height: 1px; }
.works-tabs {
  display: flex; gap: 12px;
  margin-bottom: var(--space-xl);
  flex-wrap: wrap;
  border-bottom: 1px solid var(--border-soft);
  padding-bottom: 0;
  /* 吸顶：向下滑动 tab 固定在导航栏下方，成为二级 tab */
  position: sticky;
  top: 70px;
  z-index: 40;
  transition: background var(--dur) var(--ease-out), box-shadow var(--dur) var(--ease-out), border-radius var(--dur) var(--ease-out), padding var(--dur) var(--ease-out);
}
/* 吸顶状态：变成二级 tab 栏 */
.works-tabs.is-stuck {
  background: rgba(13, 18, 25, 0.92);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-radius: var(--radius-md);
  border-bottom-color: transparent;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.45), 0 0 0 1px var(--border-soft);
  padding: 8px;
  gap: 8px;
}
.works-tabs.is-stuck .tab {
  border-radius: var(--radius-md);
  padding: 12px 20px;
}
.works-tabs.is-stuck .tab::after { display: none; }
.works-tabs.is-stuck .tab.is-active {
  background: var(--bg-card-hover);
  box-shadow: inset 0 0 0 1px var(--border-hover);
}
.tab {
  display: flex; align-items: center; gap: 12px;
  padding: 16px 24px;
  background: transparent;
  border: 1px solid transparent;
  border-bottom: none;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  position: relative;
  color: var(--text-secondary);
  font-size: var(--fs-body);
  font-weight: 500;
  transition: all var(--dur) var(--ease-out);
  flex: 1; min-width: 200px;
}
.tab::after {
  content: ''; position: absolute; bottom: -1px; left: 50%; right: 50%;
  height: 2px; background: currentColor;
  transition: left var(--dur) var(--ease-out), right var(--dur) var(--ease-out);
}
.tab:hover { color: var(--text-primary); background: var(--bg-card); }
.tab:hover::after { left: 0; right: 0; }
.tab.is-active { color: var(--text-primary); background: var(--bg-card); }
.tab.is-active::after { left: 0; right: 0; }
.tab[data-tab="guanxin"].is-active { color: var(--accent-guanxin); }
.tab[data-tab="liepin"].is-active { color: var(--accent-liepin); }
.tab[data-tab="tencent"].is-active { color: var(--accent-tencent); }

.tab-logo {
  width: 32px; height: 32px;
  object-fit: contain;
  border-radius: 8px;
  opacity: 0.85;
  transition: opacity var(--dur) var(--ease-out), transform var(--dur) var(--ease-out);
}
.tab:hover .tab-logo { opacity: 1; }
.tab.is-active .tab-logo { opacity: 1; transform: scale(1.05); }

.tab-label { font-weight: 600; }
.tab-period {
  font-size: var(--fs-tiny);
  color: var(--text-muted);
  letter-spacing: 0.1em;
  margin-left: auto;
  font-style: italic;
}

.works-panels { position: relative; }
.works-panel {
  display: none;
  animation: panelFade 0.4s var(--ease-out);
}
.works-panel.is-active { display: block; }

.works-intro {
  margin-bottom: var(--space-xl);
  max-width: 800px;
}
.works-intro h3 {
  font-family: var(--font-cn);
  font-size: clamp(20px, 2vw, 28px);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
  letter-spacing: 0.02em;
}
.works-intro p {
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-secondary);
}

.works-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  max-width: 1100px;
  margin: 0 auto;
}
.work-card {
  grid-column: span 1;
  position: relative;
  cursor: pointer;
}
.work-card-wide { grid-column: span 1; }

.work-frame {
  position: relative;
  aspect-ratio: 16 / 9;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-frame);
  transition: transform var(--dur) var(--ease-out), box-shadow var(--dur) var(--ease-out), border-color var(--dur) var(--ease-out);
}
.work-card:hover .work-frame {
  transform: translateY(-6px) scale(1.005);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--border-hover);
}
.work-frame img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease-out);
}
.work-card:hover .work-frame img { transform: scale(1.03); }
.work-frame::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 70%, rgba(0,0,0,0.3) 100%);
  opacity: 0; transition: opacity var(--dur) var(--ease-out);
  pointer-events: none;
}
.work-card:hover .work-frame::after { opacity: 1; }

.work-card figcaption {
  margin-top: var(--space-sm);
  display: flex; flex-direction: column; gap: 4px;
}
.work-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}
.work-desc {
  font-size: var(--fs-tiny);
  color: var(--text-secondary);
  font-style: italic;
}

/* ========== Contact ========== */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: var(--space-xl);
}
@media (max-width: 860px) { .contact-grid { grid-template-columns: 1fr; } }
.contact-card {
  display: block;
  padding: var(--space-lg) var(--space-md);
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  text-align: left;
  transition: all var(--dur) var(--ease-out);
  position: relative;
  overflow: hidden;
}
.contact-card::before {
  content: ''; position: absolute; top: 0; left: 0; bottom: 0;
  width: 0; background: var(--accent-liepin);
  transition: width var(--dur) var(--ease-out);
  opacity: 0.6;
}
.contact-card:hover { border-color: var(--accent-liepin); transform: translateY(-4px); }
.contact-card:hover::before { width: 3px; }
.contact-card-static { cursor: default; }
.contact-card-static:hover { transform: none; }
.contact-card-static::before { display: none; }
.contact-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.3em;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
}
.contact-value {
  font-size: 22px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
  word-break: break-all;
}
.contact-cta {
  font-size: var(--fs-tiny);
  color: var(--accent-liepin);
  letter-spacing: 0.05em;
}

.contact-quote {
  text-align: center;
  padding: var(--space-xl) 0;
  max-width: 700px;
  margin: 0 auto;
}
.contact-quote p {
  font-size: clamp(18px, 2vw, 24px);
  line-height: 1.6;
  color: var(--text-primary);
  font-family: var(--font-cn);
}
.contact-quote .quote-en {
  margin-top: 12px;
  font-family: var(--font-body);
  font-style: italic;
  color: var(--text-muted);
  font-size: var(--fs-body);
}

/* ========== Thanks ========== */
.thanks {
  min-height: 80vh;
  display: flex; align-items: center; justify-content: center;
  text-align: center;
}
.thanks-content { display: flex; flex-direction: column; align-items: center; gap: var(--space-md); }
.thanks-title {
  font-family: var(--font-display);
  font-size: clamp(80px, 16vw, 240px);
  font-weight: 700;
  font-style: italic;
  letter-spacing: 0.02em;
  line-height: 1;
  color: var(--text-primary);
  position: relative;
  text-shadow: 0 0 60px rgba(255, 122, 61, 0.2);
}
.thanks-title::after {
  content: 'THANKS';
  position: absolute; left: 0; top: 8px;
  color: var(--accent-liepin);
  opacity: 0.25;
  z-index: -1;
  filter: blur(0px);
  transform: translate(8px, 8px);
}
.thanks-sub {
  font-size: 16px;
  color: var(--text-secondary);
  letter-spacing: 0.2em;
  font-family: var(--font-cn);
}
.thanks-back {
  display: inline-flex; align-items: center; gap: 8px;
  margin-top: var(--space-md);
  padding: 10px 22px;
  font-size: var(--fs-tiny);
  letter-spacing: 0.2em;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: 999px;
  text-transform: uppercase;
  transition: all var(--dur) var(--ease-out);
}
.thanks-back:hover { color: var(--text-primary); border-color: var(--accent-liepin); transform: translateY(-2px); }

/* ========== Footer ========== */
.footer {
  border-top: 1px solid var(--border-soft);
  padding: var(--space-md) 0;
  text-align: center;
  font-size: var(--fs-tiny);
  color: var(--text-muted);
  letter-spacing: 0.1em;
}
.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex; justify-content: center; align-items: center; gap: 12px;
  flex-wrap: wrap;
}
.footer-dot { opacity: 0.5; }

/* ========== Reading progress ========== */
.progress {
  position: fixed; top: 0; left: 0; right: 0;
  height: 2px;
  background: transparent;
  z-index: var(--z-progress);
  pointer-events: none;
}
.progress-fill {
  height: 100%; width: 0;
  background: linear-gradient(90deg, var(--accent-guanxin), var(--accent-liepin), var(--accent-tencent));
  transition: width 0.1s linear;
  box-shadow: 0 0 12px rgba(255, 122, 61, 0.5);
}

/* ========== Lightbox ========== */
.lightbox {
  position: fixed; inset: 0;
  z-index: 200;
  background: rgba(8, 12, 20, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex; align-items: center; justify-content: center;
  padding: 5vh 5vw;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s var(--ease-out);
}
.lightbox.is-open {
  opacity: 1;
  pointer-events: auto;
}
.lightbox img {
  max-width: 100%; max-height: 80vh;
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.6);
  transform: scale(0.95);
  transition: transform 0.3s var(--ease-out);
}
.lightbox.is-open img { transform: scale(1); }
.lightbox-close {
  position: absolute; top: 24px; right: 24px;
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  font-size: 28px;
  color: var(--text-primary);
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: 50%;
  transition: all 0.2s var(--ease-out);
}
.lightbox-close:hover {
  background: var(--accent-liepin);
  border-color: var(--accent-liepin);
  transform: rotate(90deg);
}
.lightbox-caption {
  position: absolute; left: 0; right: 0; bottom: 4vh;
  text-align: center;
  font-size: 16px;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
}

/* ========== Resume — mountain background (fullscreen & responsive) ========== */
.section-resume {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  /* transform 让 fixed 子元素以本节为包含块 → 实现全屏背景且只在节内可见 */
  transform: translateY(0);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.resume-bg {
  position: fixed;   /* 因父级 transform，表现为节内全屏 */
  inset: 0;
  z-index: -2;
  background: url('../assets/portfolio/resume-bg.webp') center / cover no-repeat;
  background-position: center center;
  transform: scale(1.05);
  filter: brightness(0.55) saturate(1.1);
  animation: resumeBgZoom 18s var(--ease-out) forwards;
}
.resume-overlay {
  position: fixed;   /* 同上 */
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 60% 80% at 50% 50%, transparent 0%, rgba(13, 18, 25, 0.4) 70%, rgba(13, 18, 25, 0.85) 100%),
    linear-gradient(180deg, rgba(13, 18, 25, 0.5) 0%, transparent 30%, transparent 70%, rgba(13, 18, 25, 0.5) 100%);
}
/* 竖屏 / 移动端：雪山主体放底部，避免过度裁切 */
@media (max-width: 768px), (orientation: portrait) {
  .resume-bg { background-position: center bottom; }
}
@keyframes resumeBgZoom {
  from { transform: scale(1.1); }
  to { transform: scale(1.0); }
}
.section-resume .section-title { color: #fff; text-shadow: 0 2px 12px rgba(0,0,0,.6); }
.section-resume .section-title .zh,
.section-resume .section-title .en { color: rgba(240, 244, 248, 0.85); }
.section-resume .kicker { color: var(--accent-liepin); text-shadow: 0 1px 6px rgba(0,0,0,.5); }
.section-resume .timeline-track { background: linear-gradient(90deg, transparent, rgba(255,255,255,.2), transparent); }
.section-resume .timeline-card {
  background: rgba(13, 18, 25, 0.55);
  border-color: rgba(255, 255, 255, 0.12);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}
.section-resume .timeline-period,
.section-resume .timeline-org,
.section-resume .timeline-role,
.section-resume .timeline-meta {
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.6);
}
.section-resume .timeline-dot {
  background: rgba(13, 18, 25, 0.8);
  box-shadow: 0 0 0 4px rgba(255, 122, 61, 0.15);
}

/* ========== Mobile (<= 768px) ========== */
@media (max-width: 768px) {
  .nav { padding: 14px 0; }
  .nav-inner { gap: 8px; }
  .nav-links a { font-size: 13px; padding: 6px 10px; }
  .nav-brand { font-size: 20px; }

  .hero { padding: 100px 6vw 60px; }
  .hero-eyebrow { font-size: 11px; letter-spacing: 0.3em; }
  .hero-subtitle { font-size: 16px; }
  .hero-subtitle .dot { margin: 0 6px; }
  .hero-meta { gap: 8px; margin-top: 32px; justify-content: flex-start; }
  .hero-meta li { font-size: 12px; padding: 7px 12px; }
  .hero-meta .meta-label { font-size: 9px; letter-spacing: 0.15em; }
  .hero-scroll-hint { display: none; }

  .section { padding: 64px 6vw; }
  .kicker { font-size: 11px; letter-spacing: 0.25em; }
  .section-lead { font-size: 15px; }

  .profile-stats { grid-template-columns: 1fr 1fr; gap: 10px; }
  .stat { padding: 16px; }
  .stat-num { font-size: 40px; }
  .stat-label { font-size: 13px; line-height: 1.4; }

  .timeline-list { grid-template-columns: 1fr; gap: 16px; }
  .timeline-item { padding: 16px 0 0 36px; }
  .timeline-dot { left: 0; top: 16px; }
  .timeline-track { display: none; }
  .timeline-org { font-size: 17px; }
  .timeline-role { font-size: 13px; }

  .abilities-grid { gap: 12px; }
  .ability { padding: 32px 20px; }
  .ability-num { font-size: 26px; }
  .ability-title { font-size: 22px; }

  .works-tabs {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    gap: 8px;
    padding-bottom: 4px;
    top: 60px;
    scroll-snap-type: x proximity;
  }
  /* 边缘渐隐提示：还有更多 tab 可滑动 */
  .works-tabs.can-scroll-right {
    -webkit-mask-image: linear-gradient(to right, #000 calc(100% - 36px), transparent 100%);
    mask-image: linear-gradient(to right, #000 calc(100% - 36px), transparent 100%);
  }
  .works-tabs.can-scroll-left {
    -webkit-mask-image: linear-gradient(to left, #000 calc(100% - 36px), transparent 100%);
    mask-image: linear-gradient(to left, #000 calc(100% - 36px), transparent 100%);
  }
  .works-tabs.can-scroll-left.can-scroll-right {
    -webkit-mask-image: linear-gradient(to right, transparent 0, #000 36px, #000 calc(100% - 36px), transparent 100%);
    mask-image: linear-gradient(to right, transparent 0, #000 36px, #000 calc(100% - 36px), transparent 100%);
  }
  .tab { min-width: 200px; padding: 12px 16px; flex: none; scroll-snap-align: center; }
  .works-tabs.is-stuck { padding: 6px; }
  .works-tabs::-webkit-scrollbar { display: none; }
  .tab-period { display: none; }
  .tab-label { font-size: 14px; }
  .tab-logo { width: 28px; height: 28px; }
  .works-grid { gap: 24px; }
  .work-title { font-size: 15px; }
  .work-desc { font-size: 12px; }

  .contact-grid { grid-template-columns: 1fr; gap: 12px; }
  .contact-card { padding: 28px 20px; }
  .contact-value { font-size: 18px; word-break: break-all; }

  .thanks-title { font-size: clamp(56px, 18vw, 120px); }
  .thanks-back { font-size: 11px; padding: 8px 18px; }

  .footer-inner { font-size: 11px; gap: 8px; padding: 0 6vw; }
}

/* 超小屏 (<= 380px) */
@media (max-width: 380px) {
  .hero-title { font-size: 64px; }
  .hero-meta { gap: 6px; }
  .hero-meta li { font-size: 11px; padding: 6px 10px; }
  .stat-num { font-size: 34px; }
  .stat-label { font-size: 12px; }
  .ability-num { font-size: 22px; }
}