/* ============================================================
   WEB NOOK · Caldera-themed (Refero Styles fe8cdcf9)
   ============================================================ */

:root {
  --caldera-ember:         #FF7D1A;
  --caldera-plasma:        #524ae9;
  --caldera-sulfur:        #f5f28e;
  --caldera-obsidian:      #070607;
  --caldera-pumice:        #e2e2df;
  --caldera-limestone:     #f7f6f2;
  --caldera-chalk:         #ffffff;

  --color-canvas:            #1a191b;
  --color-surface:           #262529;
  --color-surface-alt:       #201f22;
  --color-ink:               var(--caldera-chalk);
  --color-ink-secondary:     #c0bcb8;
  --color-ink-muted:         #8a8580;
  --color-accent:            var(--caldera-ember);
  --color-accent-ink:        var(--caldera-obsidian);
  --color-tag:               var(--caldera-sulfur);
  --color-tag-ink:           var(--caldera-obsidian);
  --color-highlight:         var(--caldera-plasma);
  --color-inverse:           var(--caldera-chalk);
  --color-line:              #3a383c;
  --color-line-strong:       #5a575e;
  --color-dark-surface:      var(--caldera-obsidian);
  --color-dark-ink:          var(--caldera-chalk);
  --color-dark-muted:        #9a9794;
  --color-dark-link:         #c9c8c5;
  --color-dark-line:         #2a282c;

  --font-display: "PP Neue Corp Compact", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body:    "DM Sans", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-caption: system-ui, -apple-system, "Segoe UI", "PingFang SC", sans-serif;

  --fw-display:   900;
  --fw-heading:   900;
  --fw-subhead:   500;
  --fw-body:      400;
  --fw-caption:   400;

  --fs-cap:       12px;
  --fs-body:      15px;
  --fs-body-lg:   18px;
  --fs-lead:      21.6px;
  --fs-30:        30px;
  --fs-h:         32px;
  --fs-40:        40px;
  --fs-h-lg:      48px;
  --fs-64:        64px;
  --fs-h-2xl:     80px;
  --fs-h-3xl:     96px;
  --fs-display:   189px;

  --lh-display:   0.94;
  --lh-3xl:       0.95;
  --lh-2xl:       1.1;
  --lh-heading:   1.0;
  --lh-sm:        1.5;
  --lh-body:      1.7;
  --lh-cap:       1.2;

  --track-display:  0.02em;
  --track-heading:  0.01em;
  --track-body:     0;
  --track-tag:      0.08em;

  --w-max:            1280px;
  --gutter:           32px;
  --space-section:    80px;
  --space-card-inner: 40px;
  --space-gap:        16px;
  --space-md:         24px;
  --space-lg:         32px;
  --space-xl:         64px;
  --nav-height:       72px;

  --r-sm:      16px;
  --r-md:      20px;
  --r-card:    40px;
  --r-pill:    800px;

  --cta-height:   40px;
  --cta-pad-x:    24px;
  --nav-pill-bg:  var(--color-surface);
  --nav-pill-r:   var(--r-pill);
  --card-bg:      var(--color-surface);
  --tag-bg:       var(--caldera-sulfur);
  --tag-ink:      var(--caldera-obsidian);
  --pill-border:  1px solid var(--color-line);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; background: var(--color-canvas); }
body {
  font-family: var(--font-body);
  font-weight: var(--fw-body);
  background: transparent;
  color: var(--color-ink);
  line-height: var(--lh-body);
  font-size: var(--fs-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; }
::selection { background: var(--caldera-sulfur); color: var(--caldera-obsidian); }

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: var(--cta-height);
  padding: 0 var(--cta-pad-x);
  background: var(--color-accent);
  color: var(--color-accent-ink);
  font-family: var(--font-body);
  font-weight: var(--fw-body);
  font-size: var(--fs-body);
  letter-spacing: var(--track-body);
  border: 0;
  border-radius: var(--r-pill);
  transition: transform .2s ease, filter .2s ease, background-color .2s ease;
  cursor: pointer;
  white-space: nowrap;
}
.btn-primary:hover {
  filter: saturate(1.1) brightness(.96);
  transform: translateY(-1px);
}
.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: var(--cta-height);
  padding: 0 10px;
  color: var(--color-ink);
  font-size: var(--fs-body);
  border-bottom: 1px solid var(--color-line);
  transition: border-color .2s ease, letter-spacing .2s ease;
  width: fit-content;
}
.btn-ghost:hover {
  border-color: var(--color-ink);
  letter-spacing: 0.02em;
}

/* Navbar */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  z-index: 100;
  background: color-mix(in srgb, var(--color-canvas) 76%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  transition: border-color .25s ease, background-color .25s ease;
  border-bottom: 1px solid transparent;
}
.navbar.scrolled {
  border-bottom-color: var(--color-line);
  background: color-mix(in srgb, var(--color-canvas) 92%, transparent);
}
.nav-inner {
  max-width: var(--w-max);
  height: 100%;
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.logo-placeholder {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 30px;
  aspect-ratio: 200 / 98;
  width: auto;
  background: transparent;
  color: var(--color-inverse);
  border-radius: var(--r-sm);
  flex: none;
}
.logo-placeholder img {
  width: 100% !important;
  height: 100% !important;
  object-fit: contain;
  display: block;
  -webkit-user-drag: none;
  user-select: none;
  pointer-events: none;
}
.site-name {
  font-family: var(--font-display);
  font-weight: var(--fw-display);
  letter-spacing: var(--track-heading);
  font-size: 18px;
  color: var(--color-ink);
}

.nav-right { display: flex; align-items: center; gap: 20px; }
.nav-menu {
  display: inline-flex;
  align-items: center;
  gap: var(--space-lg);
  padding: 0;
  height: auto;
  background: transparent;
  border: 0;
  border-radius: 0;
}
.nav-link {
  font-size: var(--fs-body);
  color: var(--color-ink-secondary);
  position: relative;
  padding: 6px 2px;
  transition: color .2s ease;
  font-weight: var(--fw-body);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 50%; bottom: 2px;
  width: 0; height: 2px;
  background: var(--caldera-ember);
  transition: width .25s ease;
  transform: translateX(-50%);
  border-radius: 2px;
}
.nav-link:hover { color: var(--color-ink); }
.nav-link.active { color: var(--color-ink); }
.nav-link.active::after { width: 20px; }

/* 汉堡菜单按钮（默认隐藏，手机端显示） */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px; height: 32px;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
}
.nav-toggle-bar {
  display: block;
  width: 22px; height: 2px;
  background: var(--color-ink);
  border-radius: 2px;
  transition: transform .25s ease, opacity .2s ease;
}
.nav-toggle.is-active .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle.is-active .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}
.nav-toggle.is-active .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav-actions { display: flex; align-items: center; gap: 16px; }
.social-icons { display: flex; align-items: center; gap: 16px; }
.social-icon {
  width: 28px; height: 28px;
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--color-ink);
  transition: color .2s ease;
  border: 0; background: transparent; cursor: pointer; padding: 0;
}
.social-icon:hover { color: var(--color-accent); }
.social-icon svg { width: 22px; height: 22px; }
.social-feishu svg { width: 20px; height: 20px; }

.social-feishu, .social-wechat { position: relative; }
.social-feishu .feishu-qr,
.social-wechat .wechat-qr {
  pointer-events: none;
  position: absolute;
  top: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%) translateY(-4px);
  width: 200px;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--r-card);
  padding: var(--space-md) var(--space-md) 18px;
  opacity: 0;
  visibility: hidden;
  transition: opacity .22s ease, transform .22s ease, visibility .22s;
  z-index: 200;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  box-shadow: none;
}
.social-feishu:hover .feishu-qr,
.social-feishu:focus-within .feishu-qr,
.social-wechat:hover .wechat-qr,
.social-wechat:focus-within .wechat-qr {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}
.feishu-qr::before,
.wechat-qr::before {
  content: "";
  position: absolute;
  left: 50%;
  top: -6px;
  transform: translateX(-50%) rotate(45deg);
  width: 12px; height: 12px;
  background: var(--color-surface);
  border-left: 1px solid var(--color-line);
  border-top: 1px solid var(--color-line);
}
.qr-title {
  font-family: var(--font-caption);
  font-weight: var(--fw-caption);
  font-size: var(--fs-cap);
  color: var(--color-ink-secondary);
  letter-spacing: 0.1em;
}
.qr-box {
  width: 168px;
  height: 168px;
  padding: 6px;
  background: var(--caldera-chalk);
  border: 1px solid var(--color-line);
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.qr-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  padding-top: var(--nav-height);
  overflow: hidden;
}
.hero-decoration {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}
.hero-inner {
  position: relative;
  z-index: 1;
  max-width: var(--w-max);
  margin: 0 auto;
  padding: 120px var(--gutter) var(--space-section);
  min-height: calc(100vh - var(--nav-height));
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  gap: 60px;
}
.hero-content {
  flex: 1 1 0;
  min-width: 0;
  max-width: 620px;
}
.hero-visual {
  flex: 0 0 520px;
  width: 520px;
  height: 520px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
/* 像素点阵背景，呼应粒子球质感 */
.hero-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(color-mix(in srgb, var(--caldera-chalk) 16%, transparent) 1px, transparent 1.5px);
  background-size: 26px 26px;
  -webkit-mask-image: radial-gradient(circle at center, #000 0%, transparent 72%);
  mask-image: radial-gradient(circle at center, #000 0%, transparent 72%);
  pointer-events: none;
}
.hero-visual canvas {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  display: block;
}
/* React 液态玻璃球挂载点 */
#liquid-glass-orb-root {
  width: 100%;
  height: 100%;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  padding: 0 14px;
  height: 28px;
  background: transparent;
  color: var(--caldera-ember);
  border: 1px solid color-mix(in srgb, var(--caldera-ember) 50%, transparent);
  border-radius: var(--r-pill);
  font-family: var(--font-caption);
  font-weight: var(--fw-caption);
  font-size: var(--fs-cap);
  letter-spacing: 0.2em;
  margin-bottom: 28px;
}
.hero-title {
  font-family: var(--font-display);
  font-weight: var(--fw-display);
  font-size: clamp(38px, 4.5vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
  color: var(--color-ink);
  max-width: 640px;
}
.accent {
  background: none;
  padding: 0;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
  font-style: normal;
  color: var(--caldera-ember);
  border: 0;
}
.hero-desc {
  font-size: var(--fs-body);
  line-height: 1.8;
  color: var(--color-ink-secondary);
  max-width: 520px;
  margin-bottom: 40px;
  font-weight: var(--fw-body);
}
.hero-cta {
  display: flex;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
}

/* Section */
.section {
  max-width: var(--w-max);
  margin: 0 auto;
  padding: var(--space-section) var(--gutter);
}
.section-head {
  display: flex;
  align-items: baseline;
  gap: 18px;
  margin-bottom: 56px;
}
.section-index {
  font-family: var(--font-caption);
  font-size: var(--fs-cap);
  color: var(--color-ink-muted);
  letter-spacing: 0.2em;
}
.section-title {
  font-family: var(--font-display);
  font-weight: var(--fw-heading);
  font-size: clamp(34px, 3.1vw, 42px);
  line-height: var(--lh-heading);
  letter-spacing: var(--track-heading);
  color: var(--color-ink);
}

/* Timeline */
.timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}
.timeline::before {
  content: "";
  position: absolute;
  left: 149px;
  top: 24px;
  bottom: 24px;
  width: 2px;
  margin-left: -1px;
  background: var(--color-line);
  border-radius: 2px;
}
.timeline-item {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: var(--space-lg);
  padding: 0;
  position: relative;
}
.timeline-item::before {
  content: "";
  position: absolute;
  left: 149px;
  top: 58px;
  width: 14px; height: 14px;
  transform: translateX(-50%);
  background: var(--caldera-ember);
  border: 2px solid var(--color-ink);
  border-radius: 50%;
  z-index: 1;
}
.timeline-time { padding-top: 56px; }
.time-period {
  font-family: var(--font-caption);
  font-weight: var(--fw-caption);
  font-size: var(--fs-cap);
  color: var(--color-ink-muted);
  letter-spacing: 0.1em;
}
.timeline-body {
  background: var(--card-bg);
  border-radius: var(--r-card);
  padding: var(--space-card-inner);
}
.timeline-role {
  font-family: var(--font-display);
  font-weight: var(--fw-heading);
  font-size: var(--fs-30);
  line-height: var(--lh-sm);
  margin-bottom: 4px;
  color: var(--color-ink);
  letter-spacing: -0.005em;
}
.timeline-company {
  font-size: var(--fs-body);
  color: var(--color-ink-secondary);
  margin-bottom: 22px;
}
.timeline-desc li {
  position: relative;
  padding-left: 22px;
  font-size: var(--fs-body);
  color: var(--color-ink-secondary);
  line-height: 1.8;
  margin-bottom: 8px;
}
.timeline-desc li::before {
  content: "";
  position: absolute;
  left: 4px; top: 14px;
  width: 6px; height: 6px;
  background: var(--caldera-ember);
  border-radius: 999px;
}

/* Projects */
.project-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  max-width: 960px;
  margin: 0 auto;
}
.project-card {
  border: 1px solid var(--color-line);
  border-radius: var(--r-card);
  background: var(--card-bg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color .25s ease, transform .25s ease;
}
.project-card:hover {
  transform: translateY(-2px);
  border-color: var(--color-line-strong);
}
.project-media {
  position: relative;
  aspect-ratio: 16 / 9;
  background: var(--color-surface-alt);
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
  padding: 0;
  overflow: hidden;
  margin: 20px 20px 0;
  border-radius: var(--r-md);
}
.project-media.carousel { padding: 0; }
.project-tag {
  display: inline-flex;
  align-items: center;
  padding: 0 12px;
  height: 26px;
  background: var(--tag-bg);
  color: var(--tag-ink);
  border: 0;
  font-family: var(--font-caption);
  font-weight: var(--fw-caption);
  font-size: var(--fs-cap);
  letter-spacing: 0.16em;
  border-radius: var(--r-pill);
}

/* Carousel */
.carousel-track { position: absolute; inset: 0; }
.carousel-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity .4s ease;
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface);
  border-radius: var(--r-md);
  overflow: hidden;
}
.carousel-slide.is-active { opacity: 1; pointer-events: auto; }
.carousel-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  -webkit-user-drag: none;
  user-select: none;
  pointer-events: none;
}
.project-media > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.project-media img {
  -webkit-user-drag: none;
  user-select: none;
  -webkit-touch-callout: none;
}
.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: var(--cta-height);
  height: var(--cta-height);
  padding: 0;
  border-radius: var(--r-card);
  border: 1.5px solid color-mix(in srgb, var(--caldera-chalk) 20%, transparent);
  background: color-mix(in srgb, var(--caldera-obsidian) 30%, transparent);
  color: var(--caldera-chalk);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 5;
  box-shadow: none;
  transition: all .2s ease;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.carousel-btn svg {
  width: 18px;
  height: 18px;
  display: block;
  flex: 0 0 auto;
}
.carousel-btn:hover {
  background: color-mix(in srgb, var(--color-accent) 72%, transparent);
  color: var(--caldera-chalk);
  border-color: color-mix(in srgb, var(--color-accent) 80%, transparent);
  transform: translateY(-50%) scale(1.04);
}
.carousel-btn--prev { left: 16px; }
.carousel-btn--next { right: 16px; }
.carousel-dots {
  position: absolute;
  left: 0; right: 0;
  bottom: 16px;
  display: flex;
  justify-content: center;
  gap: 10px;
  z-index: 5;
}
.carousel-dot {
  width: 10px;
  height: 10px;
  padding: 0;
  border: 1.5px solid color-mix(in srgb, var(--caldera-obsidian) 45%, transparent);
  border-radius: 999px;
  background: color-mix(in srgb, var(--caldera-chalk) 55%, transparent);
  cursor: pointer;
  transition: all .2s ease;
  box-shadow: none;
}
.carousel-dot:hover { background: var(--caldera-chalk); transform: scale(1.15); }
.carousel-dot.is-active {
  background: var(--caldera-ember);
  width: 28px;
  border-radius: 999px;
}

.project-info {
  padding: var(--space-card-inner);
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.project-name {
  font-family: var(--font-display);
  font-weight: var(--fw-heading);
  font-size: var(--fs-h);
  line-height: var(--lh-heading);
  letter-spacing: -0.005em;
  margin: 0;
  color: var(--color-ink);
}
.project-meta {
  font-family: var(--font-caption);
  font-weight: var(--fw-caption);
  font-size: var(--fs-cap);
  color: var(--color-ink-muted);
  letter-spacing: 0.1em;
  margin: 0;
}
.project-desc {
  font-size: var(--fs-body);
  color: var(--color-ink-secondary);
  line-height: 1.8;
  margin-top: 4px;
}

/* Footer */
.footer {
  background: var(--color-canvas);
  color: var(--color-ink);
  margin-top: 0;
  padding-top: 40px;
}
.footer-inner {
  max-width: var(--w-max);
  margin: 0 auto;
  background: var(--color-dark-surface);
  color: var(--color-dark-ink);
  border-radius: var(--r-card) var(--r-card) 0 0;
  padding: 80px var(--gutter) 48px;
  display: grid;
  grid-template-columns: 1.1fr 2fr;
  gap: 60px;
  position: relative;
}
.logo-light { background: transparent; color: var(--color-inverse); padding: 0; border-radius: 0; box-shadow: none; }
.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
}
.footer-name {
  font-family: var(--font-display);
  font-weight: var(--fw-display);
  letter-spacing: 0.06em;
  font-size: 18px;
  color: var(--color-inverse);
  margin-top: 2px;
}
.footer-tagline {
  font-size: var(--fs-body);
  color: var(--color-dark-muted);
  max-width: 340px;
  line-height: 1.8;
  margin-top: 2px;
}
.footer-cols {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
}
.footer-col {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.footer-col h4 {
  font-family: var(--font-caption);
  font-weight: var(--fw-caption);
  font-size: var(--fs-cap);
  letter-spacing: 0.2em;
  color: var(--color-dark-muted);
  text-transform: uppercase;
  margin-bottom: 4px;
}
.footer-col a {
  font-size: var(--fs-body);
  color: var(--color-dark-link);
  transition: color .2s ease;
  width: fit-content;
}
.footer-col a:hover { color: var(--color-inverse); }
.footer-bottom {
  max-width: var(--w-max);
  margin: 0 auto;
  background: var(--color-dark-surface);
  padding: 24px var(--gutter) 40px;
  border-top: 1px solid var(--color-dark-line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  font-family: var(--font-caption);
  font-size: var(--fs-cap);
  color: var(--color-dark-muted);
  letter-spacing: 0.04em;
}

/* Responsive */
@media (max-width: 960px) {
  .nav-toggle { display: flex; order: 2; }
  .social-icons { order: 1; }
  .nav-menu {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px var(--gutter) 16px;
    background: color-mix(in srgb, var(--color-canvas) 96%, transparent);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--color-line);
    z-index: 99;
  }
  .nav-menu.is-open { display: flex; }
  .nav-menu .nav-link {
    padding: 14px 4px;
    border-bottom: 1px solid var(--color-dark-line);
    font-size: 16px;
  }
  .nav-menu .nav-link:last-child { border-bottom: 0; }
  .nav-menu .nav-link::after { display: none; }
  .hero-inner { padding-top: 100px; flex-direction: column; gap: 40px; }
  .hero-visual { display: flex; flex: 0 0 auto; width: 380px; height: 380px; }
  /* 手机端二维码改为居中弹窗，避免溢出屏幕 */
  .social-feishu .feishu-qr,
  .social-wechat .wechat-qr {
    position: fixed;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%) scale(0.92);
    width: 220px;
    z-index: 300;
  }
  .feishu-qr::before, .wechat-qr::before { display: none; }
  .footer-inner { grid-template-columns: 1fr; gap: 40px; padding: 60px var(--gutter) 40px; }
  .timeline::before { left: 7px; margin-left: -1px; }
  .timeline-item { grid-template-columns: 1fr; gap: 12px; }
  .timeline-item::before { left: 7px; top: 36px; width: 14px; height: 14px; transform: translateX(-50%); }
  .timeline-time { padding-top: 12px; }
  .timeline-body { padding: 24px; }
  .project-grid { grid-template-columns: 1fr; }
  .project-info { padding: 24px; }
  .project-media { margin: 16px 16px 0; }
}
@media (max-width: 768px) {
  .hero-cta .btn-ghost { display: none; }
  .hero-desc { margin-bottom: 28px; }
  .section-head { margin-bottom: 36px; }
}
@media (max-width: 560px) {
  :root { --nav-height: 60px; --gutter: 16px; }
  .site-name { font-size: 14px; letter-spacing: 0.04em; }
  .nav-actions { gap: 10px; }
  .nav-actions .btn-primary { display: none; }
  .social-icons { gap: 10px; }
  .social-icon { width: 40px; height: 40px; }
  .social-icon svg { width: 24px; height: 24px; }
  .social-feishu svg { width: 24px; height: 24px; }
  .nav-toggle { width: 40px; height: 40px; }
  .nav-toggle-bar { width: 24px; }
  .hero-inner { padding-top: 80px; padding-bottom: 48px; }
  .hero-visual { width: 280px; height: 280px; }
  .hero-title { font-size: 22px; line-height: 1.15; }
  .hero-desc { font-size: 12px; line-height: 1.7; }
  .section { padding: 48px var(--gutter); }
  .section-title { font-size: 19px; }
  .section-head { gap: 12px; margin-bottom: 28px; }
  .timeline-role { font-size: 17px; }
  .timeline-company { font-size: 12px; margin-bottom: 16px; }
  .timeline-desc li { font-size: 12px; line-height: 1.7; }
  .project-name { font-size: 17px; }
  .project-desc { font-size: 12px; line-height: 1.7; }
  .timeline-body { padding: 20px; }
  .project-info { padding: 20px; }
  .project-media { margin: 12px 12px 0; }
  .footer-inner { padding: 32px var(--gutter) 20px; gap: 20px; }
  .footer-tagline { display: none; }
  .footer-cols { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .footer-col { gap: 8px; }
  .footer-col h4 { font-size: 11px; letter-spacing: 0.1em; }
  .footer-col a { font-size: 11px; }
  .footer-bottom { justify-content: flex-start; padding: 16px var(--gutter) 24px; font-size: 11px; }
  .carousel-btn {
    width: 36px; height: 36px;
    background: color-mix(in srgb, var(--caldera-obsidian) 30%, transparent);
    border-color: color-mix(in srgb, var(--caldera-chalk) 20%, transparent);
  }
  .feishu-qr, .wechat-qr { width: 160px; }
  .feishu-qr .qr-box img, .wechat-qr .qr-box img { width: 120px !important; height: 120px !important; }
}
@media (max-width: 380px) {
  .hero-title { font-size: 19px; }
  .hero-visual { width: 240px; height: 240px; }
  .site-name { display: none; }
}