:root {
  --ink: #0d1b2a;
  --ink-soft: #4a5568;
  --muted: #a0aec0;
  --paper: #ffffff;
  --line: #e2e8f0;
  --blue: #1e3a8a;
  --blue-bright: #3b82f6;
  --blue-light: #eff6ff;
  --white: #ffffff;
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
  --shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --radius: 12px;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  color: var(--ink);
  background-color: #ffffff;
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

img,
svg {
  max-width: 100%;
}

/* Animations */
@keyframes slideUpSea {
  0% {
    transform: translateY(100%);
    opacity: 0;
  }

  100% {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes riseSun {
  0% {
    transform: translate(-50%, calc(-100% + 50px));
    opacity: 0;
  }

  100% {
    transform: translate(-50%, calc(-100% + 5px));
    opacity: 1;
  }
}

@keyframes fadeInRipple {
  0% {
    opacity: 0;
    transform: translateX(-50%) translateY(20px);
  }

  100% {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

@keyframes fadeUpText {
  0% {
    opacity: 0;
    transform: translateY(20px);
  }

  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeUpHeader {
  0% {
    opacity: 0;
    transform: translate(-50%, -20px);
  }

  100% {
    opacity: 1;
    transform: translate(-50%, 0);
  }
}

@keyframes popIn {
  0% {
    opacity: 0;
    transform: translateY(15px) scale(0.95);
  }

  70% {
    transform: translateY(-3px) scale(1.02);
  }

  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.skip-link {
  position: absolute;
  left: -9999px;
}

/* Top Bar */
.site-header {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 100px;
  padding: 8px 24px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.5);
  opacity: 0;
  animation: fadeUpHeader 0.8s ease-out forwards;
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 40px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--ink);
}

.ccsu-logo {
  height: 32px;
  width: auto;
}

.site-nav {
  display: flex;
  gap: 24px;
}

.site-nav a {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink-soft);
  white-space: nowrap;
  transition: color 0.2s;
}

.site-nav a:hover {
  color: var(--blue-bright);
}

/* Hero Section */
.hero {
  --hero-horizon-y: 50vh;
  --hero-art-x: clamp(320px, 30vw, 540px);
  --hero-sun-w: clamp(280px, 30vw, 380px);
  --hero-horizon-arc-w: 200vw;
  --hero-horizon-arc-h: 200vh;
  --hero-content-right: clamp(28px, 4.5vw, 96px);
  --hero-content-w: clamp(380px, 38vw, 620px);
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: var(--hero-content-right);
  overflow: hidden;
  background: linear-gradient(135deg, #f8faff 0%, #ffffff 100%);
}

/* Precise CSS Art - Giant Full-Screen Layout */
.hero-art {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
}

/* Horizon Arc - Pure Stroke Line without rendering bugs */
.art-sea-group {
  position: absolute;
  top: var(--hero-horizon-y);
  left: var(--hero-art-x);
  width: var(--hero-horizon-arc-w);
  height: var(--hero-horizon-arc-h);
  transform: translateX(-50%);
  z-index: 3;
  /* 弧线向右渐隐，进入右侧内容区前淡出 */
  -webkit-mask-image: linear-gradient(to right, black 0%, black 55%, transparent 63%);
  mask-image: linear-gradient(to right, black 0%, black 55%, transparent 63%);
}

.art-sea-back {
  width: 100%;
  height: 100%;
  background: transparent;
  border: 10px solid #001a4d;
  /* Use full border instead of border-top to prevent solid-block rendering bugs */
  border-radius: 50%;
  opacity: 0;
  animation: slideUpSea 1.2s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}

/* Sun - Sitting ABOVE the horizon, slightly covered by the line */
.art-sun {
  position: absolute;
  top: var(--hero-horizon-y);
  left: var(--hero-art-x);
  /* translate Y by -100% moves the sun ABOVE the line. Add 5px so it dips behind the 10px line */
  transform: translate(-50%, calc(-100% + 5px));
  width: var(--hero-sun-w);
  height: calc(var(--hero-sun-w) / 2);
  /* Semi-circle */
  border-radius: 250px 250px 0 0;
  background: linear-gradient(180deg, #ff9d00 0%, #ffb347 100%);
  z-index: 2;
  /* Behind the horizon line */
  box-shadow: 0 -20px 80px rgba(255, 157, 0, 0.2);
  opacity: 0;
  /* Animate rising from below the line */
  animation: riseSun 1.5s cubic-bezier(0.2, 0.8, 0.2, 1) 0.6s forwards;
}

/* Light Blue Ripples floating below the line */
.art-reflection {
  position: absolute;
  top: calc(var(--hero-horizon-y) + 30px);
  /* 水波纹在地平线下方 */
  left: var(--hero-art-x);
  /* 与太阳保持同一水平中心 */
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  z-index: 4;
  opacity: 0;
  animation: fadeInRipple 1.2s ease-out 1.2s forwards;
}

.art-reflection::before {
  content: "";
  display: block;
  width: calc(var(--hero-sun-w) * 0.63);
  height: 20px;
  background: #66b2ff;
  border-radius: 50%;
}

.art-reflection::after {
  content: "";
  display: block;
  width: calc(var(--hero-sun-w) * 0.42);
  height: 14px;
  background: #66b2ff;
  border-radius: 50%;
}

.art-reflection-inner {
  width: calc(var(--hero-sun-w) * 0.21);
  height: 10px;
  background: #66b2ff;
  border-radius: 50%;
}

/* Hero Content - Placed on the Right */
.hero__content {
  position: absolute;
  right: var(--hero-content-right);
  top: var(--hero-horizon-y);
  transform: translateY(-50%);
  z-index: 10;
  width: var(--hero-content-w);
  text-align: left;
}

.hero__title {
  font-size: clamp(4rem, 6.5vw, 6.5rem);
  font-weight: 900;
  color: #001a4d;
  margin: 0 0 20px;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  opacity: 0;
  animation: fadeUpText 0.8s ease-out 1.6s forwards;
}

/* Star above 'i' */
.horizon-i {
  position: relative;
  display: inline-block;
  color: inherit;
}

.horizon-star {
  position: absolute;
  top: 0.23em;
  left: 50%;
  transform: translateX(-50%);
  width: 0.31em;
  height: 0.31em;
  color: #ff9d00;
}

.hero__tagline {
  font-size: clamp(1.1rem, 1.8vw, 1.4rem);
  color: #4a5568;
  margin: 0 0 48px;
  letter-spacing: 0.25em;
  font-weight: 600;
  opacity: 0;
  animation: fadeUpText 0.8s ease-out 1.9s forwards;
}

.hero__actions {
  display: flex;
  justify-content: flex-start;
  gap: 20px;
  opacity: 0;
  animation: popIn 0.8s ease-out 2.2s forwards;
}

/* Buttons */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 0 36px;
  height: 56px;
  border: 0;
  border-radius: 100px;
  font: inherit;
  font-weight: 800;
  font-size: 1.1rem;
  transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
  cursor: pointer;
}

.button--primary {
  background: #081636;
  color: var(--white);
  box-shadow: 0 8px 20px rgba(8, 22, 54, 0.3);
}

.button--primary:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(8, 22, 54, 0.4);
  background: #0f2a66;
}

.button--ghost {
  background: var(--white);
  color: #081636;
  border: 1px solid rgba(8, 22, 54, 0.2);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.button--ghost:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(8, 22, 54, 0.4);
}

/* Layout Utilities */
.section {
  padding: 120px 20px;
  max-width: 1200px;
  margin: 0 auto;
}

.section__heading.center {
  text-align: center;
  margin-bottom: 60px;
}

.eyebrow {
  color: var(--blue-bright);
  font-weight: 800;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 16px;
}

.section__heading h2 {
  font-size: clamp(2.2rem, 5vw, 3rem);
  font-weight: 900;
  margin: 0 0 20px;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.section__desc {
  color: var(--ink-soft);
  font-size: 1.15rem;
  max-width: 700px;
  margin: 0 auto;
}

.section__subtitle {
  display: inline-flex;
  margin: -6px 0 22px;
  padding-left: 14px;
  border-left: 5px solid rgba(13, 27, 42, 0.18);
  color: var(--ink);
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

/* Grid Layouts */
.intro-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 32px;
}

.intro-card {
  background: var(--white);
  padding: 48px 36px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  text-align: center;
  transition: all 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.intro-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(59, 130, 246, 0.25);
}

.icon-box {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  background: var(--blue-light);
  color: var(--blue-bright);
  border-radius: 20px;
  margin-bottom: 32px;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.intro-card:hover .icon-box {
  transform: scale(1.15);
}

.intro-card h3 {
  font-size: 1.4rem;
  font-weight: 800;
  margin: 0 0 16px;
  color: var(--ink);
}

.intro-card p {
  color: var(--ink-soft);
  font-size: 1.05rem;
  margin: 0;
  line-height: 1.7;
}



.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 32px;
  margin-bottom: 50px;
}

.project-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  transition: all 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 6px;
  background: var(--project-accent, var(--line));
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
}

.project-card__header {
  margin-bottom: 20px;
}

.project-card__title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  font-size: 1.5rem;
  font-weight: 800;
  margin: 0 0 16px;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.external-link {
  color: var(--muted);
  transition: color 0.2s;
}

.external-link:hover {
  color: var(--blue-bright);
}

.project-card__lang {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--ink-soft);
}

.language-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--project-accent, var(--muted));
}

.project-card__desc {
  color: var(--ink-soft);
  font-size: 1rem;
  margin: 0 0 24px;
  flex-grow: 1;
  line-height: 1.7;
}

.repo-topics {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 24px;
}

.repo-topics span {
  padding: 5px 10px;
  background: var(--blue-light);
  color: var(--blue-bright);
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: 700;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 32px;
}

.tags span {
  padding: 6px 14px;
  background: var(--blue-light);
  color: var(--blue-bright);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 700;
}

.project-card__footer {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.9rem;
  color: var(--muted);
  border-top: 1px solid var(--line);
  padding-top: 24px;
}

.star-count {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
}

.github-mark {
  margin-left: auto;
  color: var(--muted);
}

/* Empty Project Card */
.project-card--empty {
  border: 2px dashed var(--line);
  background: #fafcff;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.project-card--empty::before {
  display: none;
}

.project-card--empty:hover {
  border-color: var(--blue-bright);
  background: var(--blue-light);
}

.empty-icon {
  color: var(--muted);
  margin-bottom: 24px;
  transition: transform 0.4s ease;
}

.project-card--empty:hover .empty-icon {
  transform: scale(1.15);
  color: var(--blue-bright);
}

.project-card--empty h3 {
  font-size: 1.3rem;
  color: var(--ink-soft);
  margin: 0 0 12px;
  font-weight: 700;
}

.project-card--empty p {
  font-size: 1rem;
  color: var(--muted);
  margin: 0;
}

.load-state {
  justify-content: center;
  text-align: center;
}

.load-state h3 {
  margin: 0 0 12px;
}

.load-state p {
  color: var(--ink-soft);
  margin: 0 0 20px;
}

.load-state a {
  color: var(--blue-bright);
  font-weight: 800;
}

.projects-action {
  text-align: center;
  margin: 40px 0 48px;
}

.all-projects-panel {
  max-width: 1160px;
  margin: 0 auto;
  padding-bottom: 20px;
}

.all-projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 48px;
}

@media (max-width: 960px) {
  .all-projects-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }
}

.all-projects-footer {
  text-align: center;
}

/* Focus Section */
.section--focus {
  background: var(--white);
  border-radius: 48px;
  margin-bottom: 80px;
  box-shadow: 0 10px 40px -10px rgba(0, 0, 0, 0.05);
  padding-bottom: 100px;
}

.focus-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 32px;
  align-items: stretch;
}

.focus-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 22px;
  min-height: 280px;
  padding: 36px 32px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, #ffffff 0%, #fbfdff 100%);
  transition: all 0.3s ease;
}

.focus-card:hover {
  border-color: rgba(59, 130, 246, 0.25);
  box-shadow: var(--shadow-hover);
  transform: translateY(-6px);
}

.focus-card .icon-box {
  margin-bottom: 0;
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  border-radius: 18px;
}

.focus-card h3 {
  font-size: 1.42rem;
  margin: 0 0 14px;
  font-weight: 900;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.focus-card p {
  font-size: 1.02rem;
  color: var(--ink-soft);
  margin: 0;
  line-height: 1.78;
}

/* Join Section */
.section--join {
  padding-top: 80px;
}

.join-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 40px;
  align-items: center;
  padding: 40px 36px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, #ffffff 0%, #fbfdff 100%);
  transition: all 0.3s ease;
}

.join-panel:hover {
  border-color: rgba(59, 130, 246, 0.25);
  box-shadow: var(--shadow-hover);
  transform: translateY(-6px);
}

.join-panel h2 {
  margin: 0 0 18px;
  color: var(--ink);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.02em;
}

.join-panel p {
  max-width: 720px;
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.08rem;
  line-height: 1.8;
}

.join-actions {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* Join Modal */
body.modal-open {
  overflow: hidden;
}

.join-modal[hidden] {
  display: none;
}

.join-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: grid;
  place-items: center;
  padding: 24px;
}

.join-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(8, 22, 54, 0.28);
  backdrop-filter: blur(12px);
}

.join-modal__panel {
  position: relative;
  width: min(840px, 100%);
  padding: 52px;
  border: 1px solid rgba(213, 225, 240, 0.95);
  border-radius: 24px;
  background: linear-gradient(180deg, #ffffff 0%, #fbfdff 100%);
  box-shadow: 0 32px 90px rgba(8, 22, 54, 0.25);
  transform: translateY(12px) scale(0.98);
  opacity: 0;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.join-modal.is-open .join-modal__panel {
  transform: translateY(0) scale(1);
  opacity: 1;
}

.join-modal__body {
  display: grid;
  grid-template-columns: 1fr 240px;
  gap: 40px;
  align-items: center;
}

.join-modal__close {
  position: absolute;
  top: 22px;
  right: 22px;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--white);
  color: var(--ink-soft);
  font-size: 1.8rem;
  line-height: 1;
  cursor: pointer;
  transition: all 0.2s ease;
}

.join-modal__close:hover {
  color: var(--ink);
  border-color: rgba(8, 22, 54, 0.28);
  transform: rotate(90deg);
}

.join-modal h2 {
  margin: 0 0 16px;
  color: var(--ink);
  font-size: clamp(2rem, 4.5vw, 2.8rem);
  font-weight: 900;
  letter-spacing: -0.02em;
}

.join-modal p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.08rem;
  line-height: 1.75;
}

.join-modal__notice {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-top: 20px;
  padding: 16px 18px;
  border-radius: 14px;
  background: var(--blue-light);
  color: var(--blue);
  font-size: 0.98rem;
  line-height: 1.6;
}

.join-modal__notice svg {
  flex-shrink: 0;
  margin-top: 3px;
  color: var(--blue-bright);
}

.join-modal__qrcode {
  display: flex;
  justify-content: center;
}

.qrcode-box {
  background: var(--white);
  padding: 16px;
  border-radius: 20px;
  border: 1px solid var(--line);
  box-shadow: 0 12px 30px -5px rgba(0, 0, 0, 0.09);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.qrcode-box:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px -6px rgba(59, 130, 246, 0.2);
  border-color: rgba(59, 130, 246, 0.35);
}

.qrcode-box img {
  width: 200px;
  height: 200px;
  object-fit: contain;
  border-radius: 10px;
}

.qrcode-label {
  font-size: 0.9rem;
  font-weight: 800;
  color: var(--ink);
}

.join-modal__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

/* Footer */
.site-footer {
  background: #f8fafc;
  padding: 80px 20px 60px;
  border-top: 1px solid var(--line);
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 40px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.footer-brand svg {
  color: var(--ink);
}

.footer-brand h3 {
  margin: 0 0 8px;
  font-size: 1.4rem;
  font-weight: 900;
}

.footer-brand p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.05rem;
  font-weight: 600;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 24px;
  font-weight: 700;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.footer-links a:hover {
  color: var(--blue-bright);
}

.footer-links .dot {
  color: var(--muted);
}

.footer-copyright {
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 500;
}

/* Responsive */
@media (max-width: 768px) {
  .hero {
    flex-direction: column;
    justify-content: flex-end;
  }

  .hero__content {
    width: 100%;
    padding: 0 20px 60px;
    text-align: center;
  }

  .art-sun {
    top: 30%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 250px;
    height: 250px;
  }

  .art-reflection {
    left: 50%;
  }

  .hero__title {
    font-size: 3rem;
  }

  .hero__tagline {
    font-size: 1.1rem;
    letter-spacing: 0.1em;
  }

  .hero__actions {
    flex-direction: column;
    justify-content: center;
  }

  .section {
    padding: 80px 20px;
  }

  .join-panel {
    grid-template-columns: 1fr;
    padding: 36px 28px;
  }

  .join-actions {
    align-items: stretch;
  }

  .join-modal__panel {
    padding: 36px 28px;
  }

  .join-modal__actions {
    flex-direction: column;
  }
}

/* Horizontal Scrollers */
.horizontal-scroller {
  width: 100%;
  overflow: hidden;
  padding: 20px 0 24px 0;
  mask-image: linear-gradient(90deg, transparent 0, black 7%, black 93%, transparent 100%);
}





.members-action {
  text-align: center;
  margin: 40px 0 48px;
}

.all-members-panel {
  max-width: 1120px;
  margin: 0 auto;
}

.all-members-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
}

/* Members Card */
.member-card {
  width: 280px;
  min-height: 320px;
  background: var(--white);
  border-radius: var(--radius);
  padding: 32px 24px;
  border: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: all 0.3s ease;
  scroll-snap-align: start;
  flex-shrink: 0;
}

.member-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(59, 130, 246, 0.3);
}

.member-avatar {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  margin-bottom: 20px;
  object-fit: cover;
  border: 3px solid var(--blue-light);
}

.member-name {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--ink);
  margin: 0 0 8px;
}

.horizontal-scroller {
  width: 100%;
  overflow: hidden;
  padding: 24px 0 32px 0;
  mask-image: linear-gradient(90deg, transparent 0%, rgba(0,0,0,1) 6%, rgba(0,0,0,1) 94%, transparent 100%);
  -webkit-mask-image: linear-gradient(90deg, transparent 0%, rgba(0,0,0,1) 6%, rgba(0,0,0,1) 94%, transparent 100%);
}

.horizontal-track {
  display: flex !important;
  flex-wrap: nowrap !important;
  flex-direction: row !important;
  gap: 24px;
  padding: 0 40px;
  width: max-content;
  min-width: 100%;
  align-items: stretch;
}

.marquee-track {
  display: flex !important;
  width: max-content !important;
  animation-name: marqueeLeft !important;
  animation-duration: var(--marquee-duration, 35s) !important;
  animation-timing-function: linear !important;
  animation-iteration-count: infinite !important;
  will-change: transform;
}

.auto-marquee:hover .marquee-track,
.auto-marquee.is-paused .marquee-track {
  animation-play-state: paused !important;
}

@keyframes marqueeLeft {
  0% {
    transform: translate3d(0, 0, 0);
  }
  100% {
    transform: translate3d(-50%, 0, 0);
  }
}



.member-card {
  width: 280px;
  min-height: 330px;
  background: var(--white);
  border-radius: 16px;
  padding: 32px 24px 24px;
  border: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: all 0.35s cubic-bezier(0.2, 0.8, 0.2, 1);
  scroll-snap-align: start;
  flex-shrink: 0;
  position: relative;
}

.member-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 16px 32px -8px rgba(30, 58, 138, 0.12), 0 4px 12px rgba(0,0,0,0.03);
  border-color: rgba(59, 130, 246, 0.35);
}

.member-card--graduated {
  background: linear-gradient(180deg, #ffffff 0%, #fffdf8 100%);
}

.member-avatar-wrapper {
  position: relative;
  margin-bottom: 18px;
}

.member-avatar {
  width: 88px;
  height: 88px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--blue-light);
  box-shadow: 0 4px 12px rgba(0,0,0,0.06);
  transition: transform 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}

.member-card:hover .member-avatar {
  transform: scale(1.06);
  border-color: var(--blue-bright);
  box-shadow: 0 0 20px rgba(59, 130, 246, 0.3);
}

.graduated-badge {
  position: absolute;
  bottom: 0;
  right: -2px;
  background: #fff;
  border: 1px solid #fcd34d;
  border-radius: 50%;
  width: 24px;
  height: 24px;
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 6px rgba(217, 119, 6, 0.2);
}

.member-name {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--ink);
  margin: 0 0 8px;
}

.member-class {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 26px;
  padding: 0 12px;
  margin-bottom: 12px;
  border-radius: 999px;
  background: var(--blue-light);
  color: var(--blue-bright);
  font-size: 0.85rem;
  font-weight: 800;
}

.member-bio {
  font-size: 0.92rem;
  color: var(--ink-soft);
  margin: 0 0 18px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.member-github {
  margin-top: auto;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 600;
  transition: color 0.2s;
}

.member-meta {
  display: inline-block;
  margin-top: 6px;
  padding: 2px 10px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 600;
  background: #f1f5f9;
}

.member-meta.is-graduated {
  background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
  color: #b45309;
  border: 1px solid #fde68a;
  font-weight: 700;
}

.member-card:hover .member-github {
  color: var(--blue-bright);
}

/* Dynamic Project Card in Horizontal Track */
.horizontal-track .project-card {
  width: clamp(320px, calc((min(1200px, 100vw - 96px) - 40px) / 3), 380px);
  min-height: 340px;
  height: auto;
  scroll-snap-align: start;
  flex-shrink: 0;
  margin-bottom: 0;
  transition: all 0.35s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.horizontal-track .project-card:hover {
  transform: translateY(-8px) scale(1.015);
  box-shadow: 0 20px 35px -10px rgba(0, 0, 0, 0.09), 0 0 15px var(--project-accent, rgba(59, 130, 246, 0.2));
}

.horizontal-track .project-card__footer {
  margin-top: auto;
  flex-wrap: wrap;
}

@media (prefers-reduced-motion: reduce) {
  .marquee-track {
    animation: none;
  }

  .horizontal-scroller {
    overflow-x: auto;
    mask-image: none;
  }
}

/* Skeleton Loading */
.skeleton {
  position: relative;
  overflow: hidden;
  background: #f7fbff;
  border-color: #e2e8f0;
}

.skeleton::before {
  content: "";
  position: absolute;
  top: 0;
  left: -150%;
  width: 50%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.8), transparent);
  animation: loading 1.5s infinite;
}

@keyframes loading {
  100% {
    left: 150%;
  }
}

@media (min-width: 769px) and (max-width: 1180px) {
  .site-header {
    padding-inline: clamp(16px, 2.2vw, 22px);
  }

  .header-inner {
    gap: clamp(18px, 2.6vw, 30px);
  }

  .site-nav {
    gap: clamp(14px, 2vw, 20px);
  }

  .site-nav a {
    font-size: clamp(0.86rem, 1.45vw, 0.94rem);
  }

  .hero {
    --hero-art-x: clamp(260px, 30vw, 340px);
    --hero-sun-w: clamp(240px, 28vw, 320px);
    --hero-content-right: clamp(24px, 3.5vw, 44px);
    --hero-content-w: clamp(330px, 39vw, 430px);
  }

  .hero__title {
    font-size: clamp(3.2rem, 6vw, 4.4rem);
  }

  .hero__tagline {
    margin-bottom: 34px;
    letter-spacing: 0.16em;
  }

  .hero__actions {
    gap: 14px;
  }

  .button {
    height: 52px;
    padding: 0 26px;
    font-size: 1rem;
  }
}

@media (max-width: 900px) {
  .site-header {
    top: 12px;
    left: 12px;
    right: 12px;
    transform: none;
    padding: 8px 10px;
    border-radius: 20px;
    animation-name: popIn;
  }

  .header-inner {
    gap: clamp(8px, 1.8vw, 12px);
    min-width: 0;
  }

  .brand {
    flex-shrink: 0;
    gap: 8px;
    font-size: 1rem;
  }

  .ccsu-logo {
    height: 28px;
  }

  .site-nav {
    flex: 1;
    justify-content: space-between;
    gap: clamp(2px, 0.8vw, 8px);
    overflow: hidden;
    padding-bottom: 1px;
  }

  .site-nav::-webkit-scrollbar {
    display: none;
  }

  .site-nav a {
    flex: 0 1 auto;
    min-width: 0;
    padding: 7px clamp(6px, 1.4vw, 10px);
    border-radius: 999px;
    white-space: nowrap;
    font-size: clamp(0.74rem, 1.9vw, 0.84rem);
    letter-spacing: -0.01em;
  }

  .site-nav a.is-active {
    background: var(--blue-light);
    color: var(--blue);
  }
}

@media (max-width: 620px) {
  .brand span {
    display: none;
  }
}

@media (max-width: 520px) {
  .site-nav {
    justify-content: flex-start;
    gap: clamp(8px, 3vw, 14px);
  }

  .site-nav a {
    font-size: 0;
    padding-inline: clamp(7px, 2vw, 10px);
  }

  .site-nav a::after {
    content: attr(data-short);
    font-size: clamp(0.78rem, 3vw, 0.9rem);
  }
}

@media (max-width: 768px) {
  .hero {
    --mobile-horizon-y: clamp(250px, 37svh, 320px);
    --mobile-sun-w: clamp(210px, 62vw, 300px);
    --mobile-horizon-arc-w: calc(var(--mobile-sun-w) * 4.4);
    --mobile-horizon-arc-h: calc(var(--mobile-sun-w) * 2.1);
    --mobile-horizon-mask: calc(var(--mobile-sun-w) * 1.28);
    --mobile-horizon-mask-half: calc(var(--mobile-horizon-mask) * 0.5);
    min-height: 100svh;
    align-items: center;
    justify-content: flex-end;
    padding: 112px 18px 44px;
  }

  .hero-art {
    height: 100%;
  }

  .art-sea-group {
    top: var(--mobile-horizon-y);
    left: 50%;
    width: var(--mobile-horizon-arc-w);
    height: var(--mobile-horizon-arc-h);
    transform: translateX(-50%);
    overflow: hidden;
    -webkit-mask-image: linear-gradient(90deg,
        transparent calc(50% - var(--mobile-horizon-mask-half)),
        black calc(50% - var(--mobile-horizon-mask-half) + 24px),
        black calc(50% + var(--mobile-horizon-mask-half) - 24px),
        transparent calc(50% + var(--mobile-horizon-mask-half)));
    mask-image: linear-gradient(90deg,
        transparent calc(50% - var(--mobile-horizon-mask-half)),
        black calc(50% - var(--mobile-horizon-mask-half) + 24px),
        black calc(50% + var(--mobile-horizon-mask-half) - 24px),
        transparent calc(50% + var(--mobile-horizon-mask-half)));
  }

  .art-sea-back {
    border-width: 6px;
  }

  .art-sun {
    top: var(--mobile-horizon-y);
    left: 50%;
    width: var(--mobile-sun-w);
    max-width: none;
    height: calc(var(--mobile-sun-w) / 2);
    max-height: none;
    transform: translate(-50%, calc(-100% + 20px));
  }

  .art-reflection {
    top: calc(var(--mobile-horizon-y) + clamp(22px, 3.5svh, 32px));
    left: 50%;
    gap: clamp(10px, 2svh, 15px);
  }

  .art-reflection::before {
    width: calc(var(--mobile-sun-w) * 0.68);
    height: clamp(10px, 2.6vw, 14px);
  }

  .art-reflection::after {
    width: calc(var(--mobile-sun-w) * 0.48);
    height: clamp(8px, 2.1vw, 11px);
  }

  .art-reflection-inner {
    width: calc(var(--mobile-sun-w) * 0.28);
    height: clamp(7px, 1.8vw, 9px);
  }

  .hero__content {
    position: relative;
    right: auto;
    top: auto;
    transform: none;
    width: 100%;
    max-width: 460px;
    padding: 0;
    margin: 0 auto;
    text-align: center;
  }

  .hero__title {
    justify-content: center;
    font-size: clamp(3rem, 15.8vw, 4.45rem);
    line-height: 0.95;
    margin-bottom: 18px;
  }

  .horizon-star {
    top: -0.16em;
    width: 0.32em;
    height: 0.32em;
  }

  .hero__tagline {
    margin-bottom: 28px;
    font-size: clamp(1rem, 4vw, 1.12rem);
    letter-spacing: 0.08em;
  }

  .hero__actions {
    align-items: center;
    gap: 12px;
    width: 100%;
  }

  .button {
    width: min(100%, 320px);
    min-width: 0;
    height: 50px;
    padding: 0 22px;
    font-size: 0.98rem;
  }

  .section {
    width: 100%;
    max-width: none;
    padding: 72px 18px;
  }

  .section__heading.center {
    margin-bottom: 34px;
  }

  .section__heading h2 {
    font-size: clamp(1.85rem, 8vw, 2.35rem);
    line-height: 1.18;
  }

  .section__desc,
  .intro-card p,
  .focus-card p,
  .join-panel p,
  .footer-brand p {
    font-size: 1rem;
  }

  .section__subtitle {
    display: inline-block;
    padding-left: 10px;
    font-size: 1.02rem;
    letter-spacing: 0.04em;
  }

  .intro-grid,
  .focus-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .intro-card,
  .focus-card {
    padding: 28px 22px;
  }

  .focus-card {
    min-height: 0;
    gap: 18px;
  }

  .section--focus {
    border-radius: 24px;
    margin-bottom: 24px;
    padding-bottom: 72px;
    box-shadow: none;
  }

  .horizontal-scroller {
    width: calc(100% + 36px);
    margin-inline: -18px;
    overflow-x: auto;
    overflow-y: hidden;
    padding: 10px 0 20px;
    mask-image: none;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
  }

  .horizontal-track,
  #projects-track {
    gap: 16px;
    width: max-content;
    min-width: 0;
    padding: 0 18px;
  }

  .member-card {
    width: min(78vw, 280px);
    min-height: 300px;
    padding: 28px 20px;
  }

  .all-members-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .all-members-grid .member-card {
    width: 100%;
  }

  .horizontal-track .project-card,
  .projects-carousel-track .project-card {
    width: min(85vw, 320px);
    min-height: 0;
    padding: 28px 22px;
  }

  .carousel-btn {
    width: 40px;
    height: 40px;
  }

  .carousel-btn--prev {
    left: 2px;
  }

  .carousel-btn--next {
    right: 2px;
  }

  .project-card__title {
    align-items: flex-start;
    font-size: 1.22rem;
    line-height: 1.25;
  }

  .project-card__footer {
    gap: 10px 14px;
    padding-top: 20px;
  }

  .members-action {
    margin: 32px 0 34px;
  }

  .join-panel {
    gap: 26px;
    padding: 30px 22px;
  }

  .join-panel h2 {
    font-size: clamp(1.8rem, 8vw, 2.35rem);
  }

  .join-actions,
  .join-modal__actions {
    align-items: stretch;
  }

  .join-actions .button,
  .join-modal__actions .button,
  .projects-action .button,
  .members-action .button {
    width: 100%;
    max-width: none;
  }

  .join-modal__body {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .qrcode-box img {
    width: 140px;
    height: 140px;
  }

  .join-modal__panel {
    max-height: calc(100svh - 32px);
    overflow-y: auto;
    padding: 34px 24px 28px;
  }

  .site-footer {
    padding: 58px 18px 44px;
  }

  .footer-content {
    gap: 30px;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px 14px;
    font-size: 0.98rem;
  }
}

@media (max-width: 420px) {
  .site-header {
    left: 8px;
    right: 8px;
    top: 8px;
    padding: 7px 8px;
  }

  .header-inner {
    gap: 6px;
  }

  .ccsu-logo {
    height: 26px;
  }

  .site-nav a {
    padding: 6px 5px;
  }

  .site-nav a::after {
    font-size: clamp(0.74rem, 3.35vw, 0.82rem);
  }

  .hero {
    --mobile-horizon-y: clamp(235px, 36svh, 285px);
    --mobile-sun-w: clamp(200px, 66vw, 250px);
    --mobile-horizon-arc-w: calc(var(--mobile-sun-w) * 4.4);
    --mobile-horizon-arc-h: calc(var(--mobile-sun-w) * 2.1);
    --mobile-horizon-mask: calc(var(--mobile-sun-w) * 1.3);
    --mobile-horizon-mask-half: calc(var(--mobile-horizon-mask) * 0.5);
    padding-inline: 14px;
    padding-bottom: 36px;
  }

  .hero__title {
    font-size: clamp(2.65rem, 13vw, 3.15rem);
  }

  .hero__tagline {
    font-size: 0.95rem;
    letter-spacing: 0.04em;
  }

  .section {
    padding-inline: 16px;
  }

  .horizontal-scroller {
    width: calc(100% + 32px);
    margin-inline: -16px;
  }

  .horizontal-track,
  #projects-track {
    padding-inline: 16px;
  }
}

/* ==========================================================================
   Project Detail Showcase System — Aligned with Lab Theme
   ========================================================================== */
.project-detail-page {
  padding-top: 80px;
}

.project-hero-section {
  background: linear-gradient(135deg, #f8faff 0%, #ffffff 100%);
  padding: 60px 20px 80px;
  border-bottom: 1px solid var(--line);
}

.project-hero-container {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.breadcrumb-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 0.95rem;
  color: var(--ink-soft);
  margin-bottom: 32px;
  font-weight: 600;
}

.breadcrumb-nav a {
  color: var(--ink-soft);
  transition: color 0.2s;
}

.breadcrumb-nav a:hover {
  color: var(--blue-bright);
}

.breadcrumb-nav .sep {
  color: var(--muted);
}

.breadcrumb-nav .current {
  color: var(--blue-bright);
  font-weight: 800;
}

.project-header-main {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.project-header-main h1 {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 900;
  color: var(--ink);
  margin: 0 0 16px;
  letter-spacing: -0.02em;
  line-height: 1.2;
  text-align: center;
  word-break: break-word;
}

.project-badges-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 24px;
}

.project-lang-badge {
  display: inline-flex;
  align-items: center;
  padding: 5px 14px;
  border-radius: 999px;
  background: var(--blue-light);
  color: var(--blue-bright);
  font-size: 0.88rem;
  font-weight: 800;
}

.project-status-badge {
  padding: 5px 14px;
  border-radius: 999px;
  background: #f0fdf4;
  color: #16a34a;
  border: 1px solid #bbf7d0;
  font-size: 0.85rem;
  font-weight: 800;
}

.project-slogan {
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  color: var(--ink-soft);
  max-width: 820px;
  line-height: 1.75;
  margin: 0 auto 36px;
  text-align: center;
  font-weight: 500;
}

.project-meta-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 28px;
  padding: 16px 28px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  margin: 0 auto 40px;
  width: fit-content;
}

.meta-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--ink-soft);
}

.meta-item svg {
  color: var(--blue-bright);
}

.project-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 18px;
}

/* Features Grid — Matching Intro Cards & Focus Cards */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 32px;
}

.feature-card {
  padding: 40px 32px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: all 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(59, 130, 246, 0.3);
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  background: var(--blue-light);
  color: var(--blue-bright);
  border-radius: 18px;
  margin-bottom: 24px;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.feature-card:hover .feature-icon {
  transform: scale(1.15);
}

.feature-card h3 {
  font-size: 1.35rem;
  font-weight: 800;
  margin: 0 0 14px;
  color: var(--ink);
}

.feature-card p {
  font-size: 1.02rem;
  color: var(--ink-soft);
  margin: 0;
  line-height: 1.75;
}

/* Window Mockup Showcase Frame */
.window-mockup {
  max-width: 1100px;
  margin: 0 auto;
  border-radius: calc(var(--radius) + 4px);
  border: 1px solid var(--line);
  background: var(--white);
  box-shadow: 0 20px 50px -10px rgba(13, 27, 42, 0.12), 0 0 0 1px rgba(0,0,0,0.03);
  overflow: hidden;
  transition: box-shadow 0.3s ease;
}

.window-mockup:hover {
  box-shadow: 0 25px 60px -10px rgba(59, 130, 246, 0.18), 0 0 0 1px rgba(59, 130, 246, 0.1);
}

.window-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 22px;
  background: #f8fafc;
  border-bottom: 1px solid var(--line);
}

.window-controls {
  display: flex;
  gap: 8px;
}

.window-controls .dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.window-controls .dot.red { background: #ef4444; }
.window-controls .dot.yellow { background: #f59e0b; }
.window-controls .dot.green { background: #10b981; }

.window-title {
  font-size: 0.86rem;
  font-weight: 800;
  color: var(--ink-soft);
  letter-spacing: 0.02em;
}

.window-body {
  padding: 0;
  background: #0f172a;
  position: relative;
  overflow: hidden;
}

/* Image Slot & Intelligent Fallback Placeholder */
.image-slot-container {
  width: 100%;
  min-height: 380px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  background: linear-gradient(145deg, #0b1120 0%, #1e293b 100%);
}

.image-slot-container img.real-screenshot {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  transition: opacity 0.3s ease;
}

.image-placeholder-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 60px 24px;
  width: 100%;
  color: #e2e8f0;
}

.image-placeholder-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #94a3b8;
  margin-bottom: 14px;
}

.image-placeholder-badge {
  font-family: 'Fira Code', Consolas, Monaco, monospace;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: #93c5fd;
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.25);
  padding: 4px 14px;
  border-radius: 999px;
  margin-bottom: 18px;
}

.image-placeholder-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: #ffffff;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}

.image-placeholder-slot-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid rgba(96, 165, 250, 0.3);
  padding: 6px 16px;
  border-radius: 8px;
  font-family: 'Fira Code', Consolas, Monaco, monospace;
  font-size: 0.86rem;
  color: #93c5fd;
  margin-bottom: 12px;
}

.image-placeholder-tip {
  font-size: 0.9rem;
  color: #94a3b8;
  max-width: 520px;
  line-height: 1.6;
  margin: 0;
}

/* Interactive Showcase Gallery */
.gallery-wrapper {
  max-width: 1100px;
  margin: 0 auto;
}

.gallery-tabs-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}

.gallery-tab-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: 999px;
  background: var(--white);
  border: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 0.95rem;
  font-weight: 800;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.2, 0.8, 0.2, 1);
  box-shadow: var(--shadow-sm);
}

.gallery-tab-button:hover {
  border-color: var(--blue-bright);
  color: var(--blue-bright);
  transform: translateY(-2px);
}

.gallery-tab-button.active {
  background: var(--blue-bright);
  color: #ffffff;
  border-color: var(--blue-bright);
  box-shadow: 0 8px 20px -4px rgba(59, 130, 246, 0.4);
}

.gallery-tab-panel {
  display: none;
  animation: fadeInPanel 0.35s ease forwards;
}

.gallery-tab-panel.active {
  display: block;
}

@keyframes fadeInPanel {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.gallery-meta-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding: 20px 28px;
  background: var(--white);
  border-top: 1px solid var(--line);
}

.gallery-meta-desc {
  font-size: 0.98rem;
  color: var(--ink-soft);
  margin: 0;
  font-weight: 500;
  line-height: 1.6;
}

.gallery-meta-tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: 6px;
  background: var(--blue-light);
  color: var(--blue-bright);
  font-size: 0.82rem;
  font-weight: 800;
}

/* ==========================================================================
   Clean Project Detail Showcase — Minimalist, High Breathability
   ========================================================================== */
.container-narrow {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 20px;
}

.project-hero-clean {
  padding: 30px 0 50px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, #f8faff 0%, #ffffff 100%);
}

.hero-text-center {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 32px;
}

.hero-badge-pill {
  display: inline-flex;
  align-items: center;
  padding: 4px 14px;
  border-radius: 999px;
  background: var(--blue-light);
  color: var(--blue-bright);
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.hero-main-title {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  font-weight: 900;
  color: var(--ink);
  letter-spacing: -0.02em;
  margin: 0 0 16px;
  line-height: 1.15;
}

.hero-sub-slogan {
  font-size: clamp(1.05rem, 2vw, 1.22rem);
  color: var(--ink-soft);
  line-height: 1.7;
  margin: 0 auto 28px;
  font-weight: 500;
}

.hero-actions-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* Project Intro & Concrete Scenarios (直观业务场景说明) */
.project-intro-overview {
  max-width: 960px;
  margin: 44px auto 36px;
  text-align: center;
}

.intro-headline-wrap {
  margin-bottom: 24px;
}

.intro-eyebrow {
  display: block;
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--blue-bright);
  margin-bottom: 6px;
}

.intro-title {
  font-size: clamp(1.4rem, 2.5vw, 1.85rem);
  font-weight: 800;
  color: var(--ink);
  margin: 0 0 10px;
}

.intro-lead {
  font-size: 1.05rem;
  color: var(--ink-soft);
  line-height: 1.7;
  max-width: 760px;
  margin: 0 auto;
}

.intro-scenarios-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 22px;
  text-align: left;
  margin-top: 24px;
}

.scenario-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 28px;
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
}

.scenario-card:hover {
  border-color: rgba(59, 130, 246, 0.4);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.scenario-tag {
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--blue-bright);
  background: var(--blue-light);
  padding: 3px 10px;
  border-radius: 6px;
  width: fit-content;
  margin-bottom: 12px;
}

.scenario-card h3 {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--ink);
  margin: 0 0 8px;
}

.scenario-card p {
  font-size: 0.94rem;
  color: var(--ink-soft);
  line-height: 1.65;
  margin: 0;
}

/* Showcase Window with Integrated Tabs */
.showcase-window-wrapper {
  margin-top: 36px;
}

.showcase-tab-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.showcase-tab-btn {
  padding: 8px 18px;
  border-radius: 999px;
  background: var(--white);
  border: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
}

.showcase-tab-btn:hover {
  border-color: var(--blue-bright);
  color: var(--blue-bright);
}

.showcase-tab-btn.active {
  background: var(--blue-bright);
  border-color: var(--blue-bright);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.clean-window-mockup {
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--white);
  box-shadow: 0 16px 40px -10px rgba(13, 27, 42, 0.08);
  overflow: hidden;
}

.clean-window-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  background: #f8fafc;
  border-bottom: 1px solid var(--line);
}

.clean-window-title {
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--ink-soft);
}

.clean-window-body {
  background: #0b1120;
  min-height: 380px;
  position: relative;
}

.showcase-panel-item {
  display: none;
}

.showcase-panel-item.active {
  display: block;
}

/* 3 Clean Highlights Grid */
.highlights-three-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.highlight-clean-card {
  padding: 32px 28px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}

.highlight-clean-card:hover {
  transform: translateY(-4px);
  border-color: rgba(59, 130, 246, 0.4);
  box-shadow: var(--shadow-md);
}

.highlight-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.highlight-icon-box {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--blue-light);
  color: var(--blue-bright);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.25s ease;
}

.highlight-clean-card:hover .highlight-icon-box {
  transform: scale(1.08);
  background: rgba(59, 130, 246, 0.16);
}

.highlight-num {
  font-family: 'Fira Code', Consolas, Monaco, monospace;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: 0.05em;
}

.highlight-clean-card h3 {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--ink);
  margin: 0 0 10px;
}

.highlight-clean-card p {
  font-size: 0.95rem;
  color: var(--ink-soft);
  line-height: 1.65;
  margin: 0;
}

/* Compact Architecture 2-Column Card */
.compact-arch-card {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 36px;
  padding: 36px 32px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.arch-col-title {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--ink);
  margin: 0 0 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.flow-step-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.flow-step-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.step-badge {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--blue-light);
  color: var(--blue-bright);
  font-size: 0.8rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.flow-step-item strong {
  display: block;
  font-size: 0.95rem;
  color: var(--ink);
  margin-bottom: 4px;
}

.flow-step-item p {
  font-size: 0.88rem;
  color: var(--ink-soft);
  line-height: 1.5;
  margin: 0;
}

.stack-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 10px;
}

.clean-tag-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.clean-tag-pills span {
  padding: 5px 12px;
  border-radius: 6px;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  font-size: 0.84rem;
  font-weight: 700;
  color: #334155;
}

.clean-tag-pills span.local-pill {
  background: #f0fdf4;
  border-color: #bbf7d0;
  color: #166534;
}

@media (max-width: 800px) {
  .compact-arch-card {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 24px 20px;
  }
}

/* Terminal & Footer Team Clean */
.clean-terminal-box {
  max-width: 760px;
  margin: 0 auto 36px;
  border-radius: var(--radius);
  background: var(--ink);
  border: 1px solid rgba(255, 255, 255, 0.1);
  overflow: hidden;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15);
}

.terminal-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  background: rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--muted);
}

.clean-footer-team {
  text-align: center;
  padding-top: 10px;
}

.quiet-license-note {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 16px 0 0;
}

/* Tech Pills */
.tech-pills {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  max-width: 860px;
  margin: 0 auto;
}

.tech-pill {
  padding: 10px 24px;
  border-radius: 999px;
  background: var(--white);
  border: 1px solid var(--line);
  color: var(--ink);
  font-size: 0.98rem;
  font-weight: 800;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
}

.tech-pill:hover {
  transform: translateY(-4px);
  border-color: var(--blue-bright);
  color: var(--blue-bright);
  box-shadow: var(--shadow-md);
}

/* Terminal Card — Matching Lab Dark Aesthetic */
.terminal-card {
  max-width: 860px;
  margin: 0 auto;
  border-radius: var(--radius);
  background: var(--ink);
  box-shadow: 0 20px 50px rgba(13, 27, 42, 0.25);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.terminal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background: rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.terminal-title {
  font-size: 0.9rem;
  font-weight: 800;
  color: var(--muted);
  letter-spacing: 0.05em;
}

.copy-btn {
  padding: 6px 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--white);
  font-size: 0.82rem;
  font-weight: 800;
  cursor: pointer;
  transition: all 0.25s ease;
}

.copy-btn:hover {
  background: var(--blue-bright);
  border-color: var(--blue-bright);
  transform: translateY(-1px);
}

.terminal-code {
  margin: 0;
  padding: 28px 24px;
  font-family: 'Fira Code', Consolas, Monaco, monospace;
  font-size: 0.96rem;
  line-height: 1.75;
  color: var(--muted);
  white-space: pre-wrap;
  word-break: break-all;
}

.terminal-code code {
  color: #e2e8f0;
}

.project-nav-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 40px;
}

/* Project Contributors Section */
.contributors-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
  max-width: 980px;
  margin: 0 auto;
}

.contributor-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 24px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: all 0.35s cubic-bezier(0.2, 0.8, 0.2, 1);
  min-width: 260px;
  flex: 0 1 calc(33.333% - 24px);
}

.contributor-card:hover {
  transform: translateY(-5px);
  border-color: rgba(59, 130, 246, 0.35);
  box-shadow: 0 12px 28px -6px rgba(59, 130, 246, 0.15);
}

.contributor-avatar {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--blue-light);
  flex-shrink: 0;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
  transition: transform 0.3s ease;
}

.contributor-card:hover .contributor-avatar {
  transform: scale(1.08);
  border-color: var(--blue-bright);
}

.contributor-info {
  display: flex;
  flex-direction: column;
}

.contributor-name {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--ink);
  text-decoration: none;
  transition: color 0.2s ease;
}

.contributor-name:hover {
  color: var(--blue-bright);
}

.contributor-role {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--blue-bright);
  margin-top: 3px;
}

.contributor-class {
  display: inline-block;
  margin-top: 5px;
  padding: 2px 10px;
  border-radius: 999px;
  background: var(--blue-light);
  color: var(--blue-bright);
  font-size: 0.78rem;
  font-weight: 800;
  width: fit-content;
}

@media (max-width: 768px) {
  .contributor-card {
    flex: 1 1 100%;
    min-width: 0;
  }
}