/* =========================================================
   韩宁个人网站设计系统
   核心：响应式、无障碍、性能优先、SEO 友好
   ========================================================= */

/* ---------------- 设计 Token ---------------- */
:root {
  /* 颜色：深色为默认主题，体现专业与个性 */
  --bg-body: #0a0f1a;
  --bg-surface: rgba(255, 255, 255, 0.04);
  --bg-surface-elevated: rgba(255, 255, 255, 0.07);
  --bg-card: rgba(15, 23, 42, 0.72);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --accent: #38bdf8;
  --accent-2: #fb923c;
  --accent-glow: rgba(56, 189, 248, 0.28);
  --accent-gradient: linear-gradient(135deg, #38bdf8 0%, #818cf8 100%);
  --accent-gradient-2: linear-gradient(135deg, #fb923c 0%, #f43f5e 100%);

  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 24px 60px -20px rgba(0, 0, 0, 0.6);

  --radius-sm: 0.5rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  --radius-xl: 2rem;

  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 600ms cubic-bezier(0.4, 0, 0.2, 1);

  /* 字体：中文 Noto Sans SC + 展示字体 ZCOOL XiaoWei */
  --font-base: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
  --font-display: 'ZCOOL XiaoWei', 'Noto Sans SC', serif;

  /* 间距：8px 基准 */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* 字号 */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 2rem;
  --text-4xl: 2.5rem;
  --text-5xl: 3.5rem;
  --text-6xl: 4.5rem;
}

/* 亮色主题：通过 data-theme 或系统偏好切换 */
[data-theme="light"],
:root[data-theme="light"] {
  --bg-body: #f8fafc;
  --bg-surface: rgba(255, 255, 255, 0.72);
  --bg-surface-elevated: rgba(255, 255, 255, 0.92);
  --bg-card: rgba(255, 255, 255, 0.86);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;

  --border: rgba(15, 23, 42, 0.08);
  --border-strong: rgba(15, 23, 42, 0.14);

  --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.06);
  --shadow-md: 0 10px 30px -10px rgba(15, 23, 42, 0.12);
  --shadow-lg: 0 24px 60px -20px rgba(15, 23, 42, 0.18);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg-body: #f8fafc;
    --bg-surface: rgba(255, 255, 255, 0.72);
    --bg-surface-elevated: rgba(255, 255, 255, 0.92);
    --bg-card: rgba(255, 255, 255, 0.86);
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --border: rgba(15, 23, 42, 0.08);
    --border-strong: rgba(15, 23, 42, 0.14);
    --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.06);
    --shadow-md: 0 10px 30px -10px rgba(15, 23, 42, 0.12);
    --shadow-lg: 0 24px 60px -20px rgba(15, 23, 42, 0.18);
  }
}

/* ---------------- 重置与基础 ---------------- */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-base);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--text-primary);
  background-color: var(--bg-body);
  transition: background-color var(--transition-normal), color var(--transition-normal);
  overflow-x: hidden;
}

img, picture, video, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

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

/* ---------------- 加载动画 ---------------- */
.page-loader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-body);
  transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.page-loader.is-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loader-ring {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ---------------- 布局容器 ---------------- */
.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

@media (min-width: 640px) {
  .container {
    padding-left: var(--space-8);
    padding-right: var(--space-8);
  }
}

/* ---------------- 导航 ---------------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background-color: rgba(10, 15, 26, 0.72);
  border-bottom: 1px solid var(--border);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

[data-theme="light"] .site-header,
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) .site-header {
    background-color: rgba(248, 250, 252, 0.82);
  }
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.nav-logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 700;
}

.nav-logo__mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--accent-gradient);
  color: white;
  font-size: var(--text-sm);
  letter-spacing: 0.05em;
}

.nav-logo__text {
  font-size: var(--text-lg);
  color: var(--text-primary);
  letter-spacing: 0.05em;
}

.nav-menu {
  display: none;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--space-8);
}

.nav-link {
  position: relative;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  padding: var(--space-2) 0;
  transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--text-primary);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-gradient);
  transition: width var(--transition-fast);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  color: var(--text-primary);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  transition: background var(--transition-fast), transform var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.theme-toggle:hover {
  background: var(--bg-surface-elevated);
  transform: rotate(15deg);
}

.theme-toggle__sun,
.theme-toggle__moon {
  position: absolute;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
  font-size: 1.1rem;
}

.theme-toggle__sun {
  opacity: 0;
  transform: translateY(20px);
}

.theme-toggle__moon {
  opacity: 1;
  transform: translateY(0);
}

[data-theme="light"] .theme-toggle__sun,
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) .theme-toggle__sun {
    opacity: 1;
    transform: translateY(0);
  }
  :root:not([data-theme="dark"]) .theme-toggle__moon {
    opacity: 0;
    transform: translateY(-20px);
  }
}

.nav-mobile-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 0 8px;
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  border: 1px solid var(--border);
}

.nav-mobile-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-mobile-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-mobile-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-mobile-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (min-width: 768px) {
  .nav-menu {
    display: flex;
  }
  .nav-mobile-toggle {
    display: none;
  }
}

/* 移动端菜单 */
.nav-menu.is-open {
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-body);
  padding: var(--space-8);
  gap: var(--space-6);
  z-index: 999;
}

.nav-menu.is-open .nav-link {
  font-size: var(--text-xl);
}

/* ---------------- Hero 首屏 ---------------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 96px;
  padding-bottom: var(--space-16);
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
}

.hero__gradient {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 30%, rgba(56, 189, 248, 0.18) 0%, transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(129, 140, 248, 0.14) 0%, transparent 45%),
    radial-gradient(circle at 50% 50%, rgba(251, 146, 60, 0.08) 0%, transparent 50%);
}

.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: linear-gradient(to bottom, black 30%, transparent 100%);
  -webkit-mask-image: linear-gradient(to bottom, black 30%, transparent 100%);
  opacity: 0.5;
}

.hero__content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-12);
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero__pretitle {
  display: inline-block;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}

.hero__title {
  margin: 0 0 var(--space-6);
  line-height: 1.1;
}

.hero__name {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-5xl);
  font-weight: 900;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: 0.04em;
}

.hero__tagline {
  display: block;
  font-size: var(--text-xl);
  font-weight: 500;
  color: var(--text-secondary);
  margin-top: var(--space-3);
  letter-spacing: 0.02em;
}

.hero__lead {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  max-width: 560px;
  margin-bottom: var(--space-8);
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.hero__visual {
  display: flex;
  justify-content: center;
  position: relative;
}

.hero__avatar-wrap {
  position: relative;
  width: 280px;
  height: 280px;
}

.hero__avatar {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
  border: 4px solid var(--bg-surface);
  box-shadow: var(--shadow-lg), 0 0 80px var(--accent-glow);
  position: relative;
  z-index: 2;
  background: var(--bg-surface);
}

.hero__avatar-ring {
  position: absolute;
  inset: -16px;
  border-radius: 50%;
  border: 1px dashed var(--border-strong);
  animation: rotate-slow 30s linear infinite;
}

.hero__avatar-ring::before {
  content: '';
  position: absolute;
  inset: -8px;
  border-radius: 50%;
  border: 1px solid var(--accent);
  opacity: 0.3;
}

@keyframes rotate-slow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.hero__scroll {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  color: var(--text-muted);
  animation: bounce 2s infinite;
}

.hero__scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--accent), transparent);
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

@media (min-width: 768px) {
  .hero__content {
    grid-template-columns: 1.1fr 0.9fr;
  }
  .hero__name {
    font-size: var(--text-6xl);
  }
  .hero__avatar-wrap {
    width: 360px;
    height: 360px;
  }
}

@media (min-width: 1024px) {
  .hero__avatar-wrap {
    width: 420px;
    height: 420px;
  }
  .hero__lead {
    font-size: var(--text-xl);
  }
}

/* ---------------- 按钮 ---------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
  min-height: 44px;
  min-width: 44px;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

.btn--primary {
  background: var(--accent-gradient);
  color: white;
  box-shadow: 0 8px 24px -8px var(--accent-glow);
}

.btn--primary:hover {
  box-shadow: 0 12px 32px -8px var(--accent-glow);
}

.btn--secondary {
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
  backdrop-filter: blur(8px);
}

.btn--secondary:hover {
  background: var(--bg-surface-elevated);
  border-color: var(--accent);
}

/* ---------------- 通用 Section ---------------- */
.section {
  padding: var(--space-20) 0;
  position: relative;
}

.section__header {
  margin-bottom: var(--space-12);
  max-width: 720px;
}

.section__header--center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section__label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-3);
}

.section__title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 700;
  margin: 0 0 var(--space-4);
  color: var(--text-primary);
  line-height: 1.2;
}

.section__subtitle {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  margin: 0;
}

/* ---------------- About ---------------- */
.about__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

.about__card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}

.about__card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-strong);
}

.about__card--highlight {
  grid-column: 1 / -1;
  background: var(--accent-gradient);
  color: white;
  border: none;
}

.about__card--highlight .about__card-title,
.about__card--highlight .about__card-text {
  color: white;
}

.about__card-title {
  font-size: var(--text-xl);
  font-weight: 700;
  margin: 0 0 var(--space-4);
  color: var(--text-primary);
}

.about__card-text {
  margin: 0;
  color: var(--text-secondary);
  line-height: 1.8;
}

@media (min-width: 640px) {
  .about__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .about__grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .about__card--highlight {
    grid-column: span 2;
  }
}

/* About 简介图文区 */
.about__intro {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-12);
  align-items: center;
}

.about__intro-img img {
  width: 100%;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
}

.about__intro-text h3 {
  font-size: var(--text-xl);
  font-weight: 700;
  margin: 0 0 var(--space-4);
  color: var(--text-primary);
}

.about__intro-text p {
  margin: 0 0 var(--space-4);
  color: var(--text-secondary);
  line-height: 1.8;
}

@media (min-width: 768px) {
  .about__intro {
    grid-template-columns: 1fr 1.2fr;
  }
}

/* ---------------- 时间线（教育/经历） ---------------- */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding-left: var(--space-8);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), transparent);
}

.timeline__item {
  position: relative;
  padding-bottom: var(--space-10);
}

.timeline__item:last-child {
  padding-bottom: 0;
}

.timeline__dot {
  position: absolute;
  left: -29px;
  top: 4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent-gradient);
  border: 3px solid var(--bg-body);
  box-shadow: 0 0 0 2px var(--accent-glow);
}

.timeline__card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-6) var(--space-8);
  backdrop-filter: blur(8px);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.timeline__card:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
}

.timeline__card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-2);
  flex-wrap: wrap;
}

.timeline__title {
  font-size: var(--text-lg);
  font-weight: 700;
  margin: 0;
  color: var(--text-primary);
}

.timeline__badge {
  display: inline-flex;
  padding: var(--space-1) var(--space-3);
  border-radius: 999px;
  font-size: var(--text-xs);
  font-weight: 600;
  background: rgba(56, 189, 248, 0.12);
  color: var(--accent);
  border: 1px solid var(--border);
}

.timeline__meta {
  margin: 0 0 var(--space-2);
  color: var(--text-secondary);
  font-size: var(--text-sm);
}

.timeline__date {
  margin: 0;
  color: var(--text-muted);
  font-size: var(--text-sm);
}

.timeline__date-badge {
  display: inline-flex;
  padding: var(--space-1) var(--space-4);
  border-radius: 999px;
  font-size: var(--text-xs);
  font-weight: 700;
  background: var(--accent-gradient-2);
  color: white;
  margin-bottom: var(--space-3);
}

.timeline__role {
  margin: 0 0 var(--space-3);
  color: var(--accent);
  font-weight: 600;
  font-size: var(--text-sm);
}

.timeline__desc {
  margin: 0;
  color: var(--text-secondary);
  line-height: 1.8;
  font-size: var(--text-sm);
}

/* ---------------- 项目案例 ---------------- */
.projects {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.projects__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  backdrop-filter: blur(8px);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
}

.project-card__img-wrap {
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: var(--bg-surface);
}

.project-card__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.project-card:hover .project-card__img {
  transform: scale(1.06);
}

.project-card__body {
  padding: var(--space-6);
}

.project-card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
  flex-wrap: wrap;
}

.project-card__year {
  display: inline-flex;
  padding: var(--space-1) var(--space-3);
  border-radius: 999px;
  font-size: var(--text-xs);
  font-weight: 700;
  background: rgba(56, 189, 248, 0.12);
  color: var(--accent);
  border: 1px solid var(--border);
}

.project-card__role {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.project-card__title {
  font-size: var(--text-lg);
  font-weight: 700;
  margin: 0 0 var(--space-3);
  color: var(--text-primary);
  line-height: 1.4;
}

.project-card__desc {
  margin: 0;
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: 1.7;
}

@media (min-width: 640px) {
  .projects__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .projects__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ---------------- Roles ---------------- */
.roles {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.roles__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-4);
  max-width: 900px;
  margin: 0 auto;
}

.role {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(8px);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.role:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
}

.role--large {
  width: 100%;
  max-width: 480px;
  justify-content: center;
  padding: var(--space-6) var(--space-8);
}

.role__icon {
  font-size: 1.5rem;
  line-height: 1;
}

.role__info {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.role__name {
  font-weight: 700;
  color: var(--text-primary);
  font-size: var(--text-base);
}

.role__meta {
  font-size: var(--text-xs);
  color: var(--text-muted);
  margin-top: 2px;
}

.role__badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: var(--text-xs);
  font-weight: 700;
  background: var(--accent-gradient-2);
  color: white;
}

/* ---------------- Works ---------------- */
.works__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

.work-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-8);
  backdrop-filter: blur(8px);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.work-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.work-card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
  gap: var(--space-4);
  flex-wrap: wrap;
}

.work-card__tag {
  display: inline-flex;
  padding: var(--space-1) var(--space-3);
  border-radius: 999px;
  font-size: var(--text-xs);
  font-weight: 600;
  background: var(--bg-surface-elevated);
  color: var(--accent);
  border: 1px solid var(--border);
}

.work-card__title {
  font-size: var(--text-2xl);
  font-weight: 700;
  margin: 0;
  color: var(--text-primary);
}

.work-card__desc {
  margin: 0;
  color: var(--text-secondary);
  line-height: 1.8;
}

@media (min-width: 640px) {
  .works__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ---------------- Photos ---------------- */
.photos__filter {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-10);
  justify-content: center;
}

.photos__filter-btn {
  padding: var(--space-2) var(--space-5);
  border-radius: 999px;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  transition: all var(--transition-fast);
  min-height: 40px;
}

.photos__filter-btn:hover,
.photos__filter-btn:focus-visible,
.photos__filter-btn.is-active {
  color: white;
  background: var(--accent-gradient);
  border-color: transparent;
  box-shadow: 0 4px 16px -4px var(--accent-glow);
}

.photos__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

.photo-item {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--border);
  aspect-ratio: 4 / 3;
  cursor: pointer;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.photo-item:hover {
  transform: scale(1.01);
  box-shadow: var(--shadow-lg);
}

.photo-item.is-hidden {
  display: none;
}

.photo-item__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.photo-item:hover .photo-item__img {
  transform: scale(1.05);
}

.photo-item__overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--space-5);
  background: linear-gradient(to top, rgba(0,0,0,0.75) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--transition-normal);
  pointer-events: none;
}

.photo-item:hover .photo-item__overlay {
  opacity: 1;
}

.photo-item__title {
  color: white;
  font-weight: 600;
  font-size: var(--text-base);
  margin: 0 0 var(--space-1);
}

.photo-item__date {
  color: rgba(255,255,255,0.8);
  font-size: var(--text-xs);
  margin: 0;
}

.photos__loadmore {
  display: flex;
  justify-content: center;
  margin-top: var(--space-12);
}

.photos__loadmore.is-hidden {
  display: none;
}

@media (min-width: 640px) {
  .photos__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .photos__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* 图片 Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.92);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.lightbox.is-active {
  opacity: 1;
  visibility: visible;
}

.lightbox__img {
  max-width: 92vw;
  max-height: 86vh;
  object-fit: contain;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
}

.lightbox__close {
  position: absolute;
  top: var(--space-6);
  right: var(--space-6);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  color: white;
  font-size: 1.5rem;
  transition: background var(--transition-fast);
}

.lightbox__close:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* ---------------- Contact ---------------- */
.contact__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  max-width: 900px;
  margin: 0 auto;
}

.contact-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--space-8);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  backdrop-filter: blur(8px);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}

.contact-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
}

.contact-card__icon {
  font-size: 2rem;
  margin-bottom: var(--space-4);
}

.contact-card__title {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.contact-card__value {
  font-size: var(--text-base);
  color: var(--accent);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.contact-card__hint {
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.contact-card--placeholder {
  cursor: default;
}

@media (min-width: 640px) {
  .contact__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .contact__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ---------------- Footer ---------------- */
.site-footer {
  padding: var(--space-8) 0;
  border-top: 1px solid var(--border);
  background: var(--bg-surface);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  text-align: center;
}

.footer__name {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--text-primary);
}

.footer__copy {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.footer__links {
  display: flex;
  gap: var(--space-6);
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer__links a {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.footer__links a:hover {
  color: var(--accent);
}

@media (min-width: 640px) {
  .footer__inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

/* ---------------- 滚动进入动画 ---------------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------------- 打印优化 ---------------- */
@media print {
  .site-header,
  .hero__scroll,
  .theme-toggle,
  .nav-mobile-toggle,
  .photos__loadmore,
  .hero__cta,
  .page-loader {
    display: none !important;
  }
  .hero {
    min-height: auto;
    padding-top: 0;
  }
  body {
    background: white !important;
    color: black !important;
  }
}