:root {
  /* 优化后的绿色系配色 - 更精致、更有层次 */
  --bg: #f5f1e8;
  --bg-paper: #fbf8f1;
  --bg-elevated: #ffffff;
  --text-dark: #1a2e1a;
  --text-body: #3a4a3a;
  --text-muted: #6b7a6b;
  --green-deep: #3d5a35;
  --green-mid: #6b8e5a;
  --green-light: #a8c49a;
  --green-pale: #e0ead8;
  --green-glow: rgba(107, 142, 90, 0.15);
  --cream: #f0ebe0;
  --border: #e0d9c8;
  --border-strong: #c9c1ad;
  --card-bg: #fdfbf5;

  /* 统一间距系统 - 8px基础单位 */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;

  /* 升级后的阴影体系 - 更柔和、更精致 */
  --shadow-xs: 0 1px 2px rgba(61, 90, 53, 0.04);
  --shadow-sm: 0 2px 8px rgba(61, 90, 53, 0.06);
  --shadow: 0 4px 24px rgba(61, 90, 53, 0.08);
  --shadow-md: 0 8px 32px rgba(61, 90, 53, 0.10);
  --shadow-lg: 0 16px 48px rgba(61, 90, 53, 0.14);
  --shadow-glow: 0 0 24px rgba(107, 142, 90, 0.20);

  /* 圆角体系统一 */
  --radius-sm: 6px;
  --radius: 10px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 999px;

  /* 动效曲线 */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

::selection {
  background: var(--green-pale);
  color: var(--green-deep);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Source Han Sans SC", "Noto Sans CJK SC", "WenQuanYi Micro Hei", sans-serif;
  background: var(--bg);
  color: var(--text-body);
  line-height: 1.75;
  min-height: 100vh;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
  color-scheme: light;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: 'kern' 1, 'liga' 1;
  font-size: 16px;
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}

/* ========== Layout ========== */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 40px;
}

.page-content {
  padding: 48px 0;
}

/* ========== Header ========== */
.site-header {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  padding: 24px 0;
  margin-bottom: 32px;
  position: sticky;
  top: 0;
  background: rgba(245, 241, 232, 0.85);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  z-index: 100;
  transition: padding 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}
.site-header.scrolled {
  padding: 16px 0;
  box-shadow: var(--shadow-sm);
  border-bottom: 1px solid var(--border);
}
.site-logo {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-dark);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.site-nav {
  display: flex;
  gap: 40px;
  list-style: none;
}
.site-nav a {
  color: var(--text-body);
  text-decoration: none;
  font-size: 14px;
  font-weight: 400;
  transition: color 0.3s var(--ease-out);
  outline: none;
  position: relative;
  padding: 4px 0;
}
.site-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--green-deep);
  transition: width 0.3s var(--ease-out);
}
.site-nav a:hover { color: var(--green-deep); }
.site-nav a:hover::after { width: 100%; }
.site-nav a.active { color: var(--green-deep); font-weight: 500; }
.site-nav a.active::after { width: 100%; }
.site-nav a:focus-visible { outline: 2px solid var(--green-deep); outline-offset: 4px; border-radius: 2px; }

/* ========== Buttons ========== */
.btn {
  padding: 12px 24px;
  border: none;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  transition: all 0.3s var(--ease-out);
  border-radius: var(--radius-sm);
  font-family: 'Inter', sans-serif;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  outline: none;
  letter-spacing: 0.01em;
}
.btn:focus-visible { box-shadow: 0 0 0 3px var(--green-glow); }
.btn-primary {
  background: var(--green-deep);
  color: var(--bg-paper);
  box-shadow: 0 4px 12px rgba(61, 90, 53, 0.2);
}
.btn-primary:hover {
  background: #2d4528;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(61, 90, 53, 0.28);
}
.btn-primary:active { transform: translateY(0); }
.btn-outline {
  background: transparent;
  border: 1px solid var(--border-strong);
  color: var(--text-body);
}
.btn-outline:hover {
  border-color: var(--green-mid);
  color: var(--green-deep);
  background: var(--bg-paper);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}
.btn-outline:active { transform: translateY(0); }

/* ========== Section Heading ========== */
.section-heading {
  text-align: center;
  margin-bottom: 56px;
  position: relative;
}
.section-heading h2 {
  font-size: 46px;
  color: var(--text-dark);
  margin-bottom: 14px;
  letter-spacing: -0.02em;
  font-weight: 700;
}
.section-heading h2 em {
  font-style: italic;
  color: var(--green-deep);
  font-weight: 600;
}
.section-heading p {
  color: var(--text-muted);
  font-size: 16px;
  letter-spacing: 0.02em;
}
.section-heading::after {
  content: '';
  display: block;
  width: 40px;
  height: 2px;
  background: var(--green-mid);
  margin: 20px auto 0;
  border-radius: 1px;
}

/* ========== Home / About ========== */
.hero {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 64px;
  align-items: center;
  padding: 24px 0 0;
  min-height: calc(100vh - 180px);
}
.hero-eyebrow {
  font-size: 13px;
  color: var(--green-deep);
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 16px;
  display: inline-block;
  padding: 6px 14px;
  background: var(--green-pale);
  border-radius: var(--radius-full);
}
.hero-text h1 {
  font-size: 64px;
  line-height: 1.08;
  color: var(--text-dark);
  margin-bottom: 20px;
  letter-spacing: -0.03em;
  font-weight: 700;
}
.hero-text h1 .script {
  font-style: normal;
  font-weight: 700;
  color: var(--green-deep);
  font-size: 72px;
  display: inline-block;
  position: relative;
}
.hero-text h1 .script::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 0;
  width: 100%;
  height: 8px;
  background: var(--green-pale);
  z-index: -1;
  border-radius: 4px;
}
.hero-desc {
  font-size: 17px;
  line-height: 1.85;
  color: var(--text-body);
  margin-bottom: 32px;
  max-width: 580px;
}
.hero-buttons { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 24px; }

.hero-skills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  max-width: 560px;
}
.skill-chip {
  font-size: 12px;
  color: var(--green-deep);
  padding: 5px 12px;
  background: var(--bg-paper);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: all 0.25s var(--ease-out);
}
.skill-chip:hover {
  background: var(--green-pale);
  border-color: var(--green-light);
  transform: translateY(-1px);
}

.hero-basic-info {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.basic-item {
  font-size: 13px;
  color: var(--text-muted);
  padding: 6px 14px;
  background: var(--bg-paper);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  letter-spacing: 0.02em;
}

/* Hero Visual */
.hero-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
}
.portrait-frame {
  width: 300px;
  height: 450px;
  background: var(--cream);
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
  box-shadow:
    0 0 0 3px #fff,
    0 0 0 6px var(--green-mid),
    var(--shadow-lg);
  transition: transform 0.4s var(--ease-out), box-shadow 0.4s var(--ease-out);
}
.portrait-frame:hover {
  transform: translateY(-4px) scale(1.01);
  box-shadow:
    0 0 0 3px #fff,
    0 0 0 6px var(--green-deep),
    var(--shadow-glow);
}
.portrait-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
  display: block;
}

.hero-stats {
  display: flex;
  gap: 32px;
  padding: 18px 28px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.stat-item {
  text-align: center;
}
.stat-item h4 {
  font-size: 30px;
  color: var(--green-deep);
  margin-bottom: 2px;
  font-weight: 700;
  line-height: 1;
}
.stat-item p {
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

/* JD Mini Card */
.jd-mini-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px 28px;
  box-shadow: var(--shadow);
  margin-top: 28px;
  width: 520px;
  max-width: 100%;
}

/* ========== JD Matcher (Full) ========== */
.jd-matcher {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 36px;
  box-shadow: var(--shadow);
}
#jd-matcher-section {
  padding: 32px 0 48px;
}
.jd-mini-title {
  font-size: 17px;
  color: var(--green-deep);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
}
.jd-mini-row {
  display: flex;
  gap: 12px;
  align-items: center;
}
.jd-mini-input {
  flex: 1;
  padding: 10px 16px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
  background: var(--bg-paper);
  color: var(--text-muted);
  font-style: italic;
}
.jd-mini-btn {
  padding: 10px 20px;
  background: var(--green-deep);
  color: var(--bg-paper);
  border: none;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 6px;
  outline: none;
  transition: background-color 0.3s;
}
.jd-mini-btn:hover { background: #3a5232; }
.jd-mini-btn:focus-visible { box-shadow: 0 0 0 2px var(--green-deep); }

/* ========== JD Matcher (Full) ========== */
.jd-input-area h3, .jd-result-area h3 {
  font-size: 19px;
  color: var(--green-deep);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
}
.jd-textarea {
  width: 100%;
  height: 220px;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 14px 16px;
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  line-height: 1.7;
  resize: none;
  background: var(--bg-paper);
  color: var(--text-body);
  transition: border-color 0.3s;
}
.jd-textarea:focus { outline: none; border-color: var(--green-mid); }
.jd-textarea:focus-visible { outline: 2px solid var(--green-deep); outline-offset: 2px; }
.jd-textarea::placeholder { color: var(--text-muted); font-style: italic; }

.jd-helper-buttons {
  display: flex;
  gap: 10px;
  margin-top: 12px;
  margin-bottom: 16px;
}
.helper-btn {
  padding: 6px 14px;
  font-size: 12px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  cursor: pointer;
  border-radius: 4px;
  transition: border-color 0.2s, color 0.2s;
  outline: none;
}
.helper-btn:hover { border-color: var(--green-mid); color: var(--green-deep); }
.helper-btn:focus-visible { box-shadow: 0 0 0 2px var(--green-deep); }

.match-score {
  text-align: center;
  padding: 24px;
  background: var(--green-pale);
  border-radius: 8px;
  margin-bottom: 20px;
}
.score-label { font-size: 12px; color: var(--green-deep); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 8px; }
.score-number {
  font-size: 56px;
  color: var(--green-deep);
  font-weight: 700;
  line-height: 1;
}
.score-bar {
  width: 100%;
  height: 8px;
  background: var(--cream);
  border-radius: 4px;
  margin-top: 16px;
  overflow: hidden;
}
.score-bar-fill {
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, var(--green-mid), var(--green-deep));
  border-radius: 4px;
  transition: width 1s ease;
}

.match-dimensions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}
.dim-row {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
}
.dim-label { width: 90px; color: var(--text-body); flex-shrink: 0; }
.dim-bar {
  flex: 1;
  height: 6px;
  background: var(--cream);
  border-radius: 3px;
  overflow: hidden;
}
.dim-bar-fill {
  height: 100%;
  background: var(--green-mid);
  border-radius: 3px;
  width: 0%;
  transition: width 1s ease;
}
.dim-score { width: 32px; text-align: right; color: var(--green-deep); font-weight: 500; font-size: 12px; }

.highlights {
  background: var(--bg-paper);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 16px;
}
.highlights h4 {
  font-size: 13px;
  color: var(--green-deep);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.highlights ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.highlights li {
  font-size: 12px;
  color: var(--text-body);
  padding-left: 16px;
  position: relative;
  line-height: 1.6;
}
.highlights li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--green-mid);
  font-weight: 600;
}

/* ========== Experience ========== */
.timeline {
  position: relative;
  padding-left: 48px;
  max-width: 920px;
  margin: 48px auto;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 14px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--green-light) 0%, var(--border) 100%);
}
.timeline-item {
  position: relative;
  margin-bottom: 56px;
}
.timeline-item:last-child { margin-bottom: 0; }
.timeline-dot {
  position: absolute;
  left: -40px;
  top: 10px;
  width: 16px;
  height: 16px;
  background: var(--green-deep);
  border: 3px solid var(--bg);
  border-radius: 50%;
  z-index: 1;
  box-shadow: 0 0 0 4px var(--green-pale);
  transition: transform 0.3s var(--ease-spring);
}
.timeline-item:hover .timeline-dot {
  transform: scale(1.2);
}
.timeline-date {
  font-style: italic;
  font-size: 16px;
  color: var(--green-deep);
  margin-bottom: 10px;
  letter-spacing: 0.02em;
  font-weight: 500;
}
.work-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: all 0.4s var(--ease-out);
  position: relative;
  overflow: hidden;
}
.work-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--green-deep), var(--green-mid));
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.4s var(--ease-out);
}
.work-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: var(--green-light);
}
.work-card:hover::before { transform: scaleY(1); }
.work-header { margin-bottom: 20px; }
.work-header h3 {
  font-size: 26px;
  color: var(--text-dark);
  margin-bottom: 6px;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.work-company {
  font-size: 16px;
  color: var(--green-deep);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
}
.work-company::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--green-mid);
  border-radius: 50%;
}
.work-responsibilities { margin-bottom: 12px; }
.work-responsibilities h4, .work-achievements h4 {
  font-size: 13px;
  color: var(--green-deep);
  letter-spacing: 1px;
  margin-bottom: 14px;
  font-weight: 600;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--green-pale);
}
.work-responsibilities ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.work-responsibilities li {
  font-size: 15px;
  color: var(--text-body);
  padding-left: 22px;
  position: relative;
  line-height: 1.75;
}
.work-responsibilities li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--green-mid);
  font-weight: 700;
  font-size: 13px;
}
.work-achievements ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.work-achievements li {
  font-size: 15px;
  color: var(--text-body);
  padding-left: 22px;
  position: relative;
  line-height: 1.75;
}
.work-achievements li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--green-mid);
  font-weight: 700;
  font-size: 13px;
}

/* ========== Projects ========== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 28px;
  margin-top: 48px;
}
.project-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.4s var(--ease-out);
  position: relative;
}
.project-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top right, var(--green-glow), transparent 60%);
  opacity: 0;
  transition: opacity 0.4s var(--ease-out);
  pointer-events: none;
  z-index: 1;
}
.project-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--green-light);
}
.project-card:hover::before { opacity: 1; }
.project-thumb {
  height: 180px;
  background: linear-gradient(135deg, var(--green-pale), var(--cream));
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  transition: background 0.4s var(--ease-out);
}
.project-card:hover .project-thumb {
  background: linear-gradient(135deg, var(--green-light), var(--green-pale));
}
.project-thumb svg {
  width: 64px;
  height: 64px;
  opacity: 0.5;
  transition: transform 0.4s var(--ease-spring), opacity 0.4s var(--ease-out);
}
.project-card:hover .project-thumb svg {
  transform: scale(1.15) rotate(5deg);
  opacity: 0.7;
}
.project-body { padding: 24px; position: relative; z-index: 2; }
.project-body h3 {
  font-size: 22px;
  color: var(--text-dark);
  margin-bottom: 8px;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.project-meta {
  font-size: 13px;
  color: var(--green-deep);
  font-style: italic;
  margin-bottom: 12px;
  letter-spacing: 0.02em;
  font-weight: 500;
}
.project-body p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 16px;
}
.project-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.project-tag {
  padding: 4px 12px;
  background: var(--bg-paper);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  font-size: 11px;
  color: var(--text-muted);
  transition: all 0.2s var(--ease-out);
}
.project-card:hover .project-tag {
  background: var(--green-pale);
  border-color: var(--green-light);
  color: var(--green-deep);
}

.project-tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 36px;
  justify-content: center;
  flex-wrap: wrap;
}
.project-tab {
  padding: 10px 28px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  font-size: 13px;
  color: var(--text-body);
  cursor: pointer;
  transition: all 0.3s var(--ease-out);
  font-family: 'Inter', sans-serif;
  outline: none;
  font-weight: 500;
}
.project-tab:hover {
  border-color: var(--green-mid);
  color: var(--green-deep);
  transform: translateY(-1px);
}
.project-tab:focus-visible { box-shadow: 0 0 0 3px var(--green-glow); }
.project-tab.active {
  background: var(--green-deep);
  color: var(--bg-paper);
  border-color: var(--green-deep);
  box-shadow: 0 4px 12px rgba(61, 90, 53, 0.2);
}
.project-tab-content { margin-top: 0; }

/* ========== Education ========== */
.edu-timeline {
  max-width: 760px;
  margin: 48px auto;
}
.edu-item {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 36px;
  padding: 32px 0;
  border-bottom: 1px solid var(--border);
  transition: padding 0.3s var(--ease-out);
}
.edu-item:last-child { border-bottom: none; }
.edu-item:hover { padding-left: 12px; }
.edu-year {
  font-style: italic;
  font-size: 18px;
  color: var(--green-deep);
  padding-top: 4px;
  letter-spacing: 0.02em;
  font-weight: 500;
  min-width: 150px;
}
.edu-detail h3 {
  font-size: 24px;
  color: var(--text-dark);
  margin-bottom: 6px;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.edu-degree {
  font-size: 14px;
  color: var(--green-deep);
  font-weight: 500;
  margin-bottom: 10px;
  display: inline-block;
  padding: 3px 12px;
  background: var(--green-pale);
  border-radius: var(--radius-full);
}
.edu-detail p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.8;
}

.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 18px;
  max-width: 760px;
  margin: 40px auto;
}
.cert-card {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 22px;
  box-shadow: var(--shadow-xs);
  transition: all 0.3s var(--ease-out);
  position: relative;
  overflow: hidden;
}
.cert-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--green-deep), var(--green-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease-out);
}
.cert-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
  border-color: var(--green-light);
}
.cert-card:hover::before { transform: scaleX(1); }
.cert-icon {
  font-size: 30px;
  flex-shrink: 0;
  transition: transform 0.3s var(--ease-spring);
}
.cert-card:hover .cert-icon { transform: scale(1.15); }
.cert-content h4 {
  font-size: 14px;
  color: var(--text-dark);
  margin-bottom: 3px;
  font-weight: 600;
}
.cert-content p {
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

/* ========== Journey (Letter) ========== */
.letter-page {
  max-width: 760px;
  margin: 48px auto;
}
.letter {
  background: linear-gradient(to bottom, #fdfbf7 0%, #f9f6f0 100%);
  border: 1px solid #e8e0d0;
  border-radius: 4px;
  padding: 56px 52px;
  box-shadow:
    0 2px 12px rgba(0,0,0,0.04),
    0 1px 2px rgba(0,0,0,0.02),
    inset 0 0 60px rgba(255,253,245,0.8);
  position: relative;
  overflow: hidden;
  background-image: 
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 27px,
      rgba(61,90,53,0.04) 27px,
      rgba(61,90,53,0.04) 28px
    );
}
.letter::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, 
    transparent 0%, 
    rgba(61,90,53,0.15) 20%, 
    rgba(61,90,53,0.15) 80%, 
    transparent 100%
  );
}
.letter::after {
  content: '';
  position: absolute;
  top: 24px;
  right: 24px;
  width: 60px;
  height: 48px;
  border: 2px dashed rgba(107,142,90,0.2);
  border-radius: 4px;
  background: linear-gradient(135deg, rgba(107,142,90,0.06), transparent);
}
.letter-stamp {
  position: absolute;
  top: 28px;
  right: 28px;
  width: 52px;
  height: 40px;
  border: 1.5px solid rgba(185,68,68,0.3);
  border-radius: 3px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  color: rgba(185,68,68,0.4);
  font-family: 'Ma Shan Zheng', cursive;
  transform: rotate(-5deg);
}
.letter-stamp span {
  line-height: 1.2;
}
.letter-h2 {
  font-family: 'Ma Shan Zheng', cursive;
  font-size: 38px;
  color: #2d4528;
  margin-bottom: 40px;
  text-align: center;
  font-weight: normal;
  letter-spacing: 0.08em;
  position: relative;
  z-index: 1;
}
.letter-h2::after {
  content: '';
  display: block;
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(107,142,90,0.4), transparent);
  margin: 16px auto 0;
}
.letter-body {
  font-family: 'Noto Serif SC', serif;
}
.letter-body p {
  font-size: 17px;
  line-height: 2.1;
  color: #3a4a3a;
  margin-bottom: 24px;
  text-indent: 2em;
  position: relative;
  z-index: 1;
}
.letter-signoff {
  text-align: right;
  margin-top: 56px;
  font-family: 'Ma Shan Zheng', cursive;
  font-size: 26px;
  color: #2d4528;
  position: relative;
  z-index: 1;
  line-height: 1.8;
}
.letter-signoff span {
  font-size: 16px;
  color: rgba(61,90,53,0.5);
  font-family: 'Noto Serif SC', serif;
  display: block;
  margin-top: 4px;
}
.letter-seal {
  position: absolute;
  bottom: 32px;
  right: 32px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, #c95a5a, #8b3a3a);
  opacity: 0.15;
  box-shadow: inset 0 0 10px rgba(0,0,0,0.2);
}

/* ========== Contact Modal ========== */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(26, 46, 26, 0.5);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.modal-overlay.active {
  display: flex;
  animation: modalOverlayIn 0.3s var(--ease-out);
}
@keyframes modalOverlayIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
.modal-content {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  max-width: 380px;
  width: 100%;
  box-shadow: var(--shadow-lg);
  position: relative;
  text-align: center;
  animation: modalContentIn 0.4s var(--ease-spring);
}
@keyframes modalContentIn {
  from { opacity: 0; transform: translateY(20px) scale(0.96); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
.modal-close {
  position: absolute;
  top: 14px;
  right: 18px;
  background: none;
  border: none;
  font-size: 22px;
  color: var(--text-muted);
  cursor: pointer;
  outline: none;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  transition: all 0.2s var(--ease-out);
  display: flex;
  align-items: center;
  justify-content: center;
}
.modal-close:hover {
  background: var(--cream);
  color: var(--green-deep);
  transform: rotate(90deg);
}
.modal-close:focus-visible { box-shadow: 0 0 0 3px var(--green-glow); }
.qr-code-placeholder {
  display: inline-block;
  width: 168px;
  height: 168px;
  border-radius: var(--radius);
  object-fit: contain;
  background: #fff;
}
.contact-email {
  font-size: 15px;
  color: var(--text-body);
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
}
.contact-email strong { color: var(--green-deep); }
.contact-info {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  text-align: left;
}
.contact-row {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--cream);
  transition: padding 0.2s var(--ease-out);
}
.contact-row:last-child { border-bottom: none; }
.contact-row:hover { padding-left: 6px; }
.contact-label {
  font-size: 13px;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}
.contact-value {
  font-size: 13px;
  color: var(--text-dark);
  font-weight: 500;
}
.contact-value a {
  color: var(--green-deep);
  text-decoration: none;
  transition: color 0.2s var(--ease-out);
}
.contact-value a:hover { color: var(--green-mid); text-decoration: underline; }

/* ========== Footer ========== */
.site-footer {
  text-align: center;
  padding: 40px;
  color: var(--text-muted);
  font-size: 13px;
  font-style: italic;
  border-top: 1px solid var(--border);
  margin-top: 80px;
  letter-spacing: 0.02em;
}

/* ========== 滚动渐入动效 ========== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* 项目卡片交错延迟 */
.projects-grid .project-card.reveal:nth-child(1) { transition-delay: 0s; }
.projects-grid .project-card.reveal:nth-child(2) { transition-delay: 0.1s; }
.projects-grid .project-card.reveal:nth-child(3) { transition-delay: 0.2s; }
.projects-grid .project-card.reveal:nth-child(4) { transition-delay: 0.3s; }
.projects-grid .project-card.reveal:nth-child(5) { transition-delay: 0.4s; }
.projects-grid .project-card.reveal:nth-child(6) { transition-delay: 0.5s; }

/* 证书卡片交错延迟 */
.cert-grid .cert-card:nth-child(1) { transition-delay: 0s; }
.cert-grid .cert-card:nth-child(2) { transition-delay: 0.08s; }
.cert-grid .cert-card:nth-child(3) { transition-delay: 0.16s; }
.cert-grid .cert-card:nth-child(4) { transition-delay: 0.24s; }
.cert-grid .cert-card:nth-child(5) { transition-delay: 0.32s; }

/* ========== Mobile Bottom Navigation ========== */
.site-bottom-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--border);
  padding: 8px 0 24px;
  z-index: 100;
  box-shadow: 0 -4px 24px rgba(61, 90, 53, 0.06);
}
.site-bottom-nav ul {
  display: flex;
  justify-content: space-around;
  list-style: none;
  padding: 0;
  margin: 0;
}
.site-bottom-nav li { flex: 1; }
.site-bottom-nav a {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 8px 0;
  text-decoration: none;
  color: var(--text-muted);
  font-size: 10px;
  font-weight: 500;
  transition: color 0.25s var(--ease-out);
  gap: 4px;
}
.site-bottom-nav a svg {
  width: 22px;
  height: 22px;
  stroke-width: 2;
  fill: none;
  transition: stroke 0.25s var(--ease-out), transform 0.25s var(--ease-spring);
}
.site-bottom-nav a.active { color: var(--green-deep); }
.site-bottom-nav a.active svg { stroke: var(--green-deep); transform: scale(1.1); }
.site-bottom-nav a:hover { color: var(--green-mid); }
.site-bottom-nav a:hover svg { stroke: var(--green-mid); }

/* ========== Mobile Hamburger (for desktop only) ========== */
.site-menu-toggle {
  display: none;
}

/* ========== Responsive ========== */
@media (max-width: 900px) {
  .site-bottom-nav { display: block; }
  .site-header { justify-content: center; }
  .site-nav { display: none; }

  .hero {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
    min-height: auto;
    padding: 16px 0 0;
  }
  .hero-eyebrow { margin-left: auto; margin-right: auto; }
  .hero-text h1 { font-size: 44px; }
  .hero-text h1 .script { font-size: 52px; }
  .hero-desc { margin-left: auto; margin-right: auto; }
  .hero-buttons { justify-content: center; }
  .hero-skills { justify-content: center; margin-left: auto; margin-right: auto; }
  .hero-stats { justify-content: center; flex-wrap: wrap; gap: 20px; }
  .portrait-frame { width: 240px; height: 360px; }
  .jd-matcher { grid-template-columns: 1fr; padding: 24px; }
  .edu-item { grid-template-columns: 1fr; gap: 8px; }
  .letter { padding: 40px 28px; }
  .container { padding: 0 20px; }
  .section-heading h2 { font-size: 32px; }
  .page-content, .hero { padding-bottom: 90px; }
}