/* 布局与组件 — 颜色见 themes.css */
:root {
  --radius: 14px;
  --max-width: 1000px;
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  transition: background var(--transition), color var(--transition);
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* 背景装饰 */
.bg-decoration {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  animation: float-orb 18s ease-in-out infinite;
}

.orb-1 {
  width: 420px;
  height: 420px;
  background: var(--orb-1);
  top: -8%;
  right: -5%;
  animation-delay: 0s;
}

.orb-2 {
  width: 320px;
  height: 320px;
  background: var(--orb-2);
  bottom: 10%;
  left: -8%;
  animation-delay: -6s;
}

.orb-3 {
  width: 260px;
  height: 260px;
  background: var(--orb-3);
  top: 45%;
  left: 40%;
  animation-delay: -12s;
}

[data-theme="plumrain"] .rain-layer {
  opacity: 1;
}

.rain-layer {
  position: absolute;
  inset: 0;
  opacity: 0;
  background-image: repeating-linear-gradient(
    180deg,
    transparent,
    transparent 4px,
    rgba(139, 92, 246, 0.03) 4px,
    rgba(139, 92, 246, 0.03) 5px
  );
  animation: rain-fall 0.8s linear infinite;
  transition: opacity var(--transition);
}

@keyframes float-orb {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(24px, -20px) scale(1.05); }
  66% { transform: translate(-16px, 16px) scale(0.95); }
}

@keyframes rain-fall {
  from { background-position: 0 0; }
  to { background-position: 0 80px; }
}

.site-header,
main,
.site-footer,
.theme-panel-wrap {
  position: relative;
  z-index: 1;
}

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

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

.container {
  width: min(100% - 2rem, var(--max-width));
  margin-inline: auto;
}

/* 主题切换 */
.theme-panel-wrap {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 200;
}

.theme-panel-toggle {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: none;
  cursor: pointer;
  background: var(--gradient-accent);
  color: #fff;
  font-size: 1.25rem;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
}

.theme-panel-toggle:hover {
  transform: scale(1.08);
}

.theme-panel {
  position: absolute;
  bottom: calc(100% + 0.75rem);
  right: 0;
  width: 220px;
  padding: 1rem;
  background: var(--surface-solid);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px) scale(0.96);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
}

.theme-panel.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.theme-panel-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin: 0 0 0.75rem;
}

.theme-options {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.theme-option {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.55rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: transparent;
  color: var(--text);
  font: inherit;
  font-size: 0.85rem;
  cursor: pointer;
  text-align: left;
  transition: border-color var(--transition), background var(--transition), transform 0.2s;
}

.theme-option:hover {
  border-color: var(--btn-accent-border, var(--accent));
  background: var(--btn-accent-bg, var(--accent-soft));
  color: var(--btn-accent-text, var(--text));
}

.theme-option.active {
  border-color: var(--btn-accent-border, var(--accent));
  background: var(--btn-accent-bg, var(--accent-soft));
  color: var(--btn-accent-text, var(--text));
  font-weight: 600;
}

.theme-swatch {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  flex-shrink: 0;
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.1);
}

.theme-swatch.spring { background: linear-gradient(135deg, #059669, #6ee7b7); }
.theme-swatch.plumrain { background: linear-gradient(135deg, #8b5cf6, #c4b5fd); }
.theme-swatch.twilight { background: linear-gradient(135deg, #5c2d4a, #ff6b4a 55%, #ffb347); }
.theme-swatch.autumnnight { background: linear-gradient(135deg, #060608, #1a2230 70%, #9aaccc); }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--header-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), border-color var(--transition);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.875rem 0;
  gap: 1rem;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.nav-auth {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9rem;
}

.nav-user {
  color: var(--muted);
  text-decoration: none;
  padding: 0.35rem 0.5rem;
  border-radius: 8px;
  transition: color var(--transition), background var(--transition);
}

.nav-user strong {
  font-weight: 600;
  color: var(--text);
}

.nav-user:hover {
  color: var(--btn-accent-text, var(--accent));
  background: var(--btn-accent-bg, var(--accent-soft));
}

.nav-user:hover strong {
  color: var(--btn-accent-text, var(--accent));
}

.logout-form { margin: 0; display: inline; }

.btn-link {
  background: none;
  border: none;
  padding: 0;
  color: var(--accent);
  font: inherit;
  cursor: pointer;
}

.btn-link:hover { color: var(--accent-hover); }

.nav-brand {
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--muted);
  font-size: 0.88rem;
  text-decoration: none;
  padding: 0.4rem 0.65rem;
  border-radius: 8px;
  position: relative;
  transition: color var(--transition), background var(--transition);
}

.nav-links a:hover,
.nav-links a.active,
.nav-links a[aria-current="page"] {
  color: var(--btn-accent-text, var(--accent));
  background: var(--btn-accent-bg, var(--accent-soft));
  border: 1px solid var(--btn-accent-border, transparent);
}

/* Hero */
.hero {
  padding: 5rem 0 4rem;
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 70% 20%, var(--accent-soft) 0%, transparent 55%);
  pointer-events: none;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2.5rem;
  align-items: center;
}

.hero-content {
  animation: fade-up 0.9s ease-out both;
}

.hero-visual {
  animation: fade-up 0.9s ease-out 0.15s both;
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero h1 {
  font-size: clamp(2.25rem, 5vw, 3rem);
  margin: 0 0 0.35rem;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.hero .name-en {
  color: var(--muted);
  font-size: 1.15rem;
  font-weight: 400;
  margin: 0 0 0.75rem;
}

.hero .tagline {
  font-size: 1.2rem;
  font-weight: 500;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin: 0 0 1.25rem;
}

.hero .bio {
  color: var(--muted);
  max-width: 36rem;
  margin: 0 0 1.75rem;
  font-size: 1.02rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.35rem;
  border-radius: 10px;
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: transform 0.2s, box-shadow var(--transition), background var(--transition);
}

.btn:hover {
  transform: translateY(-2px);
  text-decoration: none;
}

.btn-primary {
  background: var(--gradient-accent);
  color: #fff;
  border: 1px solid color-mix(in srgb, var(--accent) 50%, transparent);
  box-shadow: var(--btn-primary-shadow, 0 4px 16px var(--accent-soft));
  font-weight: 600;
}

.btn-primary:hover {
  filter: brightness(1.06);
  box-shadow: var(--btn-primary-shadow, 0 4px 16px var(--accent-soft)), 0 2px 4px rgba(0, 0, 0, 0.12);
}

.btn-outline {
  border: 1px solid var(--btn-raised-border, var(--border));
  color: var(--text);
  background: var(--btn-raised-bg, var(--surface-solid));
  box-shadow: var(--btn-shadow);
  backdrop-filter: blur(8px);
}

.btn-outline:hover {
  border-color: var(--btn-accent-border, var(--accent));
  color: var(--btn-accent-text, var(--accent));
  background: var(--btn-accent-bg, var(--accent-soft));
}

.avatar-wrap {
  position: relative;
}

.avatar-wrap::before {
  content: "";
  position: absolute;
  inset: -8px;
  border-radius: 50%;
  background: var(--gradient-accent);
  opacity: 0.5;
  animation: pulse-ring 3s ease-in-out infinite;
}

@keyframes pulse-ring {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.06); opacity: 0.25; }
}

.avatar {
  width: 168px;
  height: 168px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--surface-solid);
  box-shadow: var(--shadow);
  position: relative;
  z-index: 1;
  animation: avatar-float 5s ease-in-out infinite;
}

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

/* Reveal 滚动动效 */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }
.reveal-delay-6 { transition-delay: 0.6s; }

/* Sections */
section {
  padding: 3.5rem 0;
}

.section-title {
  font-size: 1.65rem;
  margin: 0 0 1.75rem;
  padding-bottom: 0.65rem;
  position: relative;
}

.section-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 48px;
  height: 3px;
  border-radius: 2px;
  background: var(--gradient-accent);
}

.section-title span {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Cards */
.card-grid {
  display: grid;
  gap: 1.25rem;
}

.card-grid.cols-3 {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.card {
  background: var(--surface);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px var(--accent-soft);
  border-color: var(--accent);
}

.card h3 {
  margin: 0 0 0.75rem;
  font-size: 1.1rem;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

/* Skills */
.skill-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.skill-item {
  background: var(--surface);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  transition: border-color var(--transition);
}

.skill-item:hover {
  border-color: var(--accent);
}

.skill-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.6rem;
  font-size: 0.95rem;
}

.skill-bar {
  height: 10px;
  background: var(--border);
  border-radius: 5px;
  overflow: hidden;
}

.skill-bar-fill {
  height: 100%;
  width: 0;
  background: var(--gradient-accent);
  border-radius: 5px;
  transition: width 1.1s cubic-bezier(0.22, 1, 0.36, 1);
}

.skill-bar-fill.animated {
  width: var(--skill-level, 0%);
}

.project-card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.project-card .btn {
  align-self: flex-start;
  margin-top: auto;
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.contact-item {
  background: var(--surface);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  transition: transform var(--transition), border-color var(--transition);
}

.contact-item:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
}

.contact-item dt {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin-bottom: 0.25rem;
}

.contact-item dd {
  margin: 0;
  font-weight: 500;
}

.site-footer {
  padding: 2rem 0;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  background: var(--bg-alt);
}

.site-footer a {
  color: var(--muted);
  margin: 0 0.5rem;
}

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

.location-line {
  margin-top: 1rem;
  color: var(--muted);
}

.beian-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.65rem 1rem;
  margin-top: 0.5rem;
}

.beian-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--muted);
  text-decoration: none;
}

.beian-link:hover {
  color: var(--accent);
  text-decoration: none;
}

.beian-icon {
  width: 16px;
  height: 16px;
  object-fit: contain;
  flex-shrink: 0;
}

.empty-hint {
  text-align: center;
  color: var(--muted);
  padding: 3rem;
}

/* Comments */
.comment-form-card h3,
.comment-guest-hint p {
  margin-top: 0;
}

.comment-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.comment-input,
.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  font: inherit;
  resize: vertical;
  background: var(--surface-solid);
  color: var(--text);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.comment-input:focus,
.form-control:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.comment-list {
  margin-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.comment-item {
  background: var(--surface);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  transition: transform var(--transition), border-color var(--transition);
  animation: fade-up 0.5s ease-out both;
}

.comment-item:hover {
  border-color: var(--accent);
  transform: translateX(4px);
}

.comment-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}

.comment-author {
  color: var(--accent);
}

.comment-meta time {
  color: var(--muted);
  font-size: 0.85rem;
}

.comment-body {
  margin: 0;
  color: var(--text);
}

.comment-empty {
  text-align: center;
  color: var(--muted);
  padding: 2rem;
}

.comment-guest-hint {
  text-align: center;
}

.flash-messages {
  list-style: none;
  padding: 0;
  margin: 0 0 1rem;
}

.flash {
  padding: 0.75rem 1rem;
  border-radius: 10px;
  margin-bottom: 0.5rem;
  animation: fade-up 0.4s ease-out;
}

.flash-success {
  background: var(--flash-success-bg);
  color: var(--flash-success-text);
}

.flash-error {
  background: var(--flash-error-bg);
  color: var(--flash-error-text);
}

/* Auth */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
  background: var(--gradient-hero);
}

.auth-card {
  width: min(100%, 400px);
  animation: fade-up 0.6s ease-out;
}

.auth-card--register {
  width: min(100%, 440px);
}

.auth-card h1 {
  margin: 0 0 0.5rem;
}

.auth-hint {
  color: var(--muted);
  margin: 0 0 1.5rem;
}

.auth-form .form-group {
  margin-bottom: 1rem;
}

.auth-form label {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.9rem;
}

.field-error {
  display: block;
  color: var(--flash-error-text);
  font-size: 0.85rem;
  margin-top: 0.25rem;
}

.field-help {
  display: block;
  color: var(--muted);
  font-size: 0.8rem;
  margin-top: 0.25rem;
}

.form-errors {
  background: var(--flash-error-bg);
  color: var(--flash-error-text);
  padding: 0.75rem 1rem;
  border-radius: 10px;
  margin-bottom: 1rem;
  list-style: none;
}

.auth-footer {
  margin-top: 1.5rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}

.btn-block {
  width: 100%;
}

.auth-code-row {
  display: flex;
  gap: 0.5rem;
  align-items: stretch;
}

.auth-code-row .form-control {
  flex: 1;
  min-width: 0;
}

.auth-code-row .btn-secondary {
  flex-shrink: 0;
  white-space: nowrap;
  padding: 0.5rem 0.85rem;
  font-size: 0.88rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface-solid);
  color: var(--text);
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
}

.auth-code-row .btn-secondary:hover:not(:disabled) {
  border-color: var(--btn-accent-border, var(--accent));
  background: var(--btn-accent-bg, var(--accent-soft));
}

.auth-code-row .btn-secondary:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .theme-panel-wrap {
    bottom: 1rem;
    right: 1rem;
  }
}

@media (max-width: 640px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero .bio {
    margin-inline: auto;
  }

  .hero-actions {
    justify-content: center;
  }

  .avatar-wrap {
    margin-inline: auto;
    width: fit-content;
  }

  .nav-auth {
    font-size: 0.85rem;
  }

  .comment-meta {
    flex-direction: column;
    align-items: flex-start;
  }

  .section-title::after {
    left: 50%;
    transform: translateX(-50%);
  }

  .hero-grid {
    text-align: center;
  }

  .section-title {
    text-align: center;
  }
}

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

  .reveal {
    opacity: 1;
    transform: none;
  }

  .skill-bar-fill {
    width: var(--skill-level, 0%) !important;
  }
}