@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@600;700&family=Inter:wght@300;400;500;600&display=swap');

:root {
  --color-bg: #fafaf9;
  --color-surface: #ffffff;
  --color-text-main: #1c1917;
  --color-text-sub: #57534e;
  --color-border: #e7e5e4;
  --color-accent: #292524;
  --font-serif: 'Cormorant Garamond', serif;
  --font-sans: 'Montserrat', sans-serif;
  --container-width: 1200px;
  --space-section: 120px;
  --transition-slow: 0.6s ease;
  --transition-fast: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text-main);
  font-family: 'Inter', var(--font-sans);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, .brand, .section-title {
  font-family: 'Noto Serif SC', var(--font-serif);
  letter-spacing: -0.02em;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition-fast);
}

ul {
  list-style: none;
}

img {
  max-width: 100%;
  display: block;
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section-padding {
  padding: var(--space-section) 0;
}

.divider {
  width: 60px;
  height: 1px;
  background-color: var(--color-border);
  margin: 24px auto;
}

/* 导航 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 24px 0;
  z-index: 1000;
  transition: all 0.4s ease;
  background-color: transparent;
}

.navbar.scrolled {
  background-color: rgba(250, 250, 249, 0.85);
  backdrop-filter: blur(12px);
  padding: 16px 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
}

.brand {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  line-height: 1.1;
  color: var(--color-text-main);
}

.nav-menu {
  display: flex;
  gap: 40px;
}

.nav-link {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-text-sub);
  position: relative;
  padding-bottom: 4px;
}

.nav-link:hover {
  color: var(--color-text-main);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-text-main);
  transition: width 0.3s ease;
}

.nav-link:hover::after {
  width: 100%;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.menu-toggle span {
  width: 24px;
  height: 2px;
  background-color: var(--color-text-main);
  transition: 0.3s;
}

/* Hero Section */
.hero-section {
  padding: 140px 20px 100px;
  background-color: #fafafa;
  display: flex;
  justify-content: center;
  text-align: center;
  overflow: hidden;
}

.hero-section .container {
  max-width: 1200px;
  margin: 0 auto;
}

.hero-tag {
  display: block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: #999;
  margin-bottom: 20px;
  text-transform: uppercase;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 900;
  color: #111;
  line-height: 1.2;
  margin: 0 0 40px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 15px;
}

.rotate-wrapper {
  display: inline-flex;
  position: relative;
  align-items: center;
  justify-content: center;
  height: 1.3em;
  padding: 0 0.6em;
  background-color: #ff5941;
  color: #fff;
  border: 3px solid #000;
  box-shadow: 6px 6px 0px 0px #000;
  border-radius: 12px;
  overflow: hidden;
  vertical-align: bottom;
  transition: width 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
  will-change: width;
}

.word-container {
  display: flex;
  white-space: nowrap;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
  height: 100%;
  align-items: center;
  justify-content: center;
}

.char {
  display: inline-block;
  opacity: 0;
  transform: translateY(100%);
  transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.4s ease;
}

.char.enter {
  opacity: 1;
  transform: translateY(0);
}

.char.exit {
  opacity: 0;
  transform: translateY(-120%);
}

.hero-subtitle {
  font-size: 1.1rem;
  color: #666;
  margin-top: 20px;
}

.keyboard-key {
  display: inline-block;
  padding: 4px 8px;
  font-family: "Consolas", "Monaco", monospace;
  font-size: 0.85em;
  line-height: 1;
  color: #333;
  background-color: #f4f4f4;
  border: 1px solid #ccc;
  border-bottom-width: 3px;
  border-radius: 5px;
  margin: 0 4px;
  box-shadow: 0 2px 3px rgba(0,0,0,0.05);
  position: relative;
  top: -2px;
}

@media (max-width: 768px) {
  .hero-title { font-size: 2rem; gap: 10px; }
  .rotate-wrapper { box-shadow: 3px 3px 0px 0px #000; border-width: 2px; height: 1.4em; }
  .hero-section { padding: 100px 20px; }
}

/* 首页三卡快速入口 */
.quick-links {
  padding-top: 40px;
  padding-bottom: 20px;
}

.quick-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.quick-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 28px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.03);
  transition: transform 0.35s ease, box-shadow 0.35s ease;
  display: flex;
  flex-direction: column;
  gap: 10px;
  position: relative;
  overflow: hidden;
}

.quick-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 28px 48px rgba(0, 0, 0, 0.06);
}

.quick-label {
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  color: #a8a29e;
}

.quick-card h3 {
  font-family: var(--font-serif);
  font-size: 1.6rem;
}

.btn-inline {
  display: inline-block;
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 4px;
  width: fit-content;
  position: relative;
}

.btn-inline:hover {
  border-bottom-color: var(--color-text-main);
}

.btn-inline::after {
  content: '→';
  margin-left: 6px;
  transition: transform 0.3s ease;
}

.btn-inline:hover::after {
  transform: translateX(4px);
}

/* 项目网格 */
.section-header {
  text-align: center;
  margin-bottom: 80px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 400;
  margin-bottom: 16px;
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
}

.project-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  transition: transform 0.4s ease, box-shadow 0.4s ease;
  cursor: pointer;
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.04);
}

.card-img-wrapper {
  height: 260px;
  overflow: hidden;
  position: relative;
}

.card-img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s ease, filter 0.4s ease;
  filter: grayscale(100%);
}

.project-card:hover .card-img-wrapper img {
  transform: scale(1.05);
  filter: grayscale(0%);
}

.card-content {
  padding: 32px;
  text-align: left;
}

.project-meta {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: #a8a29e;
  margin-bottom: 12px;
}

.project-name {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 500;
  margin-bottom: 12px;
  color: var(--color-text-main);
}

.project-desc {
  font-size: 0.95rem;
  color: var(--color-text-sub);
  font-weight: 300;
  margin-bottom: 24px;
  line-height: 1.6;
}

.btn-view {
  display: inline-block;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--color-border);
  transition: all 0.3s;
}

.project-card:hover .btn-view {
  border-bottom-color: var(--color-text-main);
  padding-left: 8px;
}

.projects-empty {
  text-align: center;
  margin-top: 30px;
  color: var(--color-text-sub);
  letter-spacing: 0.1em;
}

/* Footer */
footer.site-footer {
  background-color: #171717;
  color: #a8a29e;
  padding: 80px 0;
  margin-top: 100px;
}

.footer-grid {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 30px;
}

.footer-cta {
  text-align: center;
}

.footer-cta h2 {
  font-family: var(--font-serif);
  font-size: 3.2rem;
  color: #f5f5f4;
  margin-bottom: 20px;
  background: linear-gradient(90deg, #ffffff, #b5b5b5);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.email-link {
  font-size: 1.25rem;
  color: #d6d3d1;
  border-bottom: 1px solid #44403c;
  padding-bottom: 5px;
  transition: 0.3s;
  position: relative;
  text-decoration: none;
}

.email-link::after {
  content: '';
  position: absolute;
  width: 0;
  height: 1px;
  bottom: -5px;
  left: 0;
  background-color: #fff;
  transition: width 0.3s;
}

.email-link:hover {
  color: #fff;
  border-color: #fff;
}
.email-link:hover::after {
  width: 100%;
}

.footer-meta {
  text-align: center;
  color: #a8a29e;
  line-height: 1.6;
  font-size: 0.95rem;
}

/* 博客列表 */
.blog-hero {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: 100px;
}

.blog-layout {
  display: grid;
  grid-template-columns: 3fr 1fr;
  gap: 60px;
}

.post-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 32px;
  margin-bottom: 32px;
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.post-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.04);
}

.post-date {
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  color: #a8a29e;
  margin-bottom: 12px;
}

.post-title {
  font-family: var(--font-serif);
  font-size: 2rem;
  margin-bottom: 16px;
}

.post-excerpt {
  color: var(--color-text-sub);
  font-weight: 300;
  margin-bottom: 18px;
}

.btn-read {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.85rem;
}

.sidebar {
  position: sticky;
  top: 120px;
  align-self: flex-start;
}

.sidebar-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 24px;
  margin-bottom: 24px;
}

.sidebar-card h3 {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  margin-bottom: 12px;
}

.recent-item {
  display: flex;
  justify-content: space-between;
  font-size: 0.95rem;
  color: var(--color-text-sub);
  padding: 8px 0;
  border-bottom: 1px solid var(--color-border);
}

.recent-item:last-child {
  border-bottom: none;
}

/* 单篇文章 */
.single-hero {
  padding: 140px 0 60px;
  text-align: center;
}

.single-title {
  font-family: var(--font-serif);
  font-size: 3rem;
  margin-bottom: 12px;
}

.single-meta {
  color: #a8a29e;
  letter-spacing: 0.1em;
  font-size: 0.85rem;
}

.post-content {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 40px;
  border-radius: 8px;
}

.post-content h2,
.post-content h3,
.post-content h4 {
  font-family: var(--font-serif);
  margin: 32px 0 16px;
}

.post-content p {
  margin: 16px 0;
  color: var(--color-text-sub);
  font-weight: 300;
}

.post-content img {
  border-radius: 12px;
  margin: 20px 0;
}

/* 小应用 */
.apps-hero {
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: 110px;
}

.app-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.app-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.35s ease, box-shadow 0.35s ease;
}

.app-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 25px 45px rgba(0, 0, 0, 0.08);
}

.app-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.app-card-body {
  padding: 26px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
}

.app-card-body h3 {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 400;
}

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

.tag-list span {
  background-color: #f5f5f4;
  color: #57534e;
  padding: 6px 10px;
  border-radius: 10px;
  font-size: 0.9rem;
}

.notes {
  color: #78716c;
  font-size: 0.95rem;
}

.cta {
  margin-top: 80px;
  text-align: center;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: 40px;
}

.cta h2 {
  font-family: var(--font-serif);
  font-size: 2.4rem;
  margin-bottom: 16px;
}

.btn-primary {
  display: inline-block;
  padding: 12px 22px;
  border: 1px solid var(--color-text-main);
  border-radius: 999px;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  transition: 0.3s;
}

.btn-primary:hover {
  background-color: var(--color-text-main);
  color: #fff;
}

/* 案例页 */
.case-hero {
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: 110px;
}

.case-library .section-heading {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}

.case-library .section-heading span {
  width: 60px;
  height: 2px;
  background-color: var(--color-text-main);
}

.case-card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.case-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.35s ease, box-shadow 0.35s ease;
}

.case-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 25px 45px rgba(0, 0, 0, 0.08);
}

.case-card img {
  width: 100%;
  height: 260px;
  object-fit: cover;
}

.case-card-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.case-label {
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  color: #a8a29e;
}

.case-card h3 {
  font-family: var(--font-serif);
  font-size: 1.8rem;
}

.case-meta {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.case-meta span {
  background-color: #f5f5f4;
  color: #57534e;
  padding: 6px 10px;
  border-radius: 10px;
  font-size: 0.9rem;
}

.case-actions {
  margin-top: 12px;
}

.case-note {
  padding: 40px 0;
}

.case-note p {
  font-size: 1rem;
  color: var(--color-text-sub);
  text-align: center;
}

/* 动画 */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes bounce {
  0%,
  20%,
  50%,
  80%,
  100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-10px);
  }
  60% {
    transform: translateY(-5px);
  }
}

/* 响应式 */
@media (max-width: 1024px) {
  .portfolio-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero-title {
    font-size: 4rem;
  }
  .quick-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .case-card-grid {
    grid-template-columns: 1fr;
  }
  .app-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 3rem;
  }

  .menu-toggle {
    display: flex;
    z-index: 1001;
  }

  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    height: 100vh;
    background-color: #ffffff;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 32px;
    transition: 0.4s ease;
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.05);
  }

  .nav-menu.active {
    right: 0;
  }

  .nav-link {
    font-size: 1.2rem;
  }

  .portfolio-grid {
    grid-template-columns: 1fr;
  }

  .quick-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .social-list {
    justify-content: center;
    margin-top: 30px;
  }

  .blog-layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: relative;
    top: auto;
  }
  .case-card img {
    height: 200px;
  }
  .app-grid {
    grid-template-columns: 1fr;
  }
}