/* =========================================
   FreeGPT 地址发布页 — 样式
   Light / Dark 双主题，默认浅色
   ========================================= */

/* --- Reset & Base --- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* ========== Light Theme (default) ========== */
:root {
  --c-bg: #f5f5f7;
  --c-surface: #ffffff;
  --c-surface-alt: #f9fafb;
  --c-text: #1d1d1f;
  --c-text-secondary: #6e6e73;
  --c-text-muted: #999;
  --c-border: #e5e5ea;
  --c-primary: #6366f1;
  --c-primary-light: #eef2ff;
  --c-primary-hover: #4f46e5;
  --c-success: #22c55e;
  --c-success-bg: #f0fdf4;
  --c-success-text: #15803d;
  --c-danger: #ef4444;
  --c-danger-bg: #fef2f2;
  --c-danger-text: #b91c1c;
  --c-warning: #f59e0b;
  --c-warning-bg: #fffbeb;
  --c-warning-text: #92400e;
  --c-proxy: #f97316;
  --c-proxy-bg: #fff7ed;
  --c-proxy-text: #9a3412;

  /* Component tokens */
  --c-card-bg: var(--c-surface-alt);
  --c-card-border: var(--c-border);
  --c-card-hover-bg: rgba(99, 102, 241, .05);
  --c-card-hover-border: var(--c-primary);
  --c-card-hover-shadow: 0 4px 20px rgba(99, 102, 241, .12);
  --c-section-shadow: 0 1px 3px rgba(0, 0, 0, .06);
  --c-section-hover-shadow: 0 4px 16px rgba(0, 0, 0, .08);
  --c-section-hover-border: #d5d5da;
  --c-announce-bg: #fffbeb;
  --c-announce-border: #fde68a;
  --c-announce-text: #92400e;
  --c-announce-close: #b45309;
  --c-announce-close-hover: rgba(0, 0, 0, .06);
  --c-kbd-bg: var(--c-surface-alt);
  --c-kbd-border: var(--c-border);
  --c-kbd-shadow: var(--c-border);
  --c-footer-border: var(--c-border);
  --c-title-grad-1: #6366f1;
  --c-title-grad-2: #a855f7;
  --c-title-grad-3: #ec4899;
  --c-title-shadow: rgba(99, 102, 241, .15);
  --c-btn-hover-shadow: 0 0 16px rgba(99, 102, 241, .2);
  --c-glow-strength: 0;

  --glass-blur: 0px;
  --backdrop-filter: none;
  --glass-border: 1px solid var(--c-border);
  --radius: 16px;
  --radius-sm: 12px;
  --radius-xs: 8px;
  --container-max: 820px;
  --transition: .25s cubic-bezier(.4, 0, .2, 1);
  --theme-transition: .4s cubic-bezier(.4, 0, .2, 1);
}

/* ========== Dark Theme ========== */
[data-theme="dark"] {
  --c-bg: #0c0a1a;
  --c-surface: rgba(255, 255, 255, .07);
  --c-surface-alt: rgba(255, 255, 255, .04);
  --c-text: #eee;
  --c-text-secondary: #a0a0b0;
  --c-text-muted: #666;
  --c-border: rgba(255, 255, 255, .1);
  --c-primary: #818cf8;
  --c-primary-light: rgba(129, 140, 248, .15);
  --c-primary-hover: #a5b4fc;
  --c-success: #34d399;
  --c-success-bg: rgba(52, 211, 153, .12);
  --c-success-text: #34d399;
  --c-danger: #f87171;
  --c-danger-bg: rgba(248, 113, 113, .12);
  --c-danger-text: #f87171;
  --c-warning: #fbbf24;
  --c-warning-bg: rgba(251, 191, 36, .12);
  --c-warning-text: #fbbf24;
  --c-proxy: #fb923c;
  --c-proxy-bg: rgba(251, 146, 60, .12);
  --c-proxy-text: #fb923c;

  --c-card-bg: rgba(255, 255, 255, .04);
  --c-card-border: rgba(255, 255, 255, .08);
  --c-card-hover-bg: rgba(129, 140, 248, .08);
  --c-card-hover-border: var(--c-primary);
  --c-card-hover-shadow: 0 4px 20px rgba(129, 140, 248, .15), inset 0 0 0 1px rgba(129, 140, 248, .2);
  --c-section-shadow: 0 4px 30px rgba(0, 0, 0, .2);
  --c-section-hover-shadow: 0 8px 40px rgba(0, 0, 0, .3);
  --c-section-hover-border: rgba(255, 255, 255, .18);
  --c-announce-bg: rgba(251, 191, 36, .1);
  --c-announce-border: rgba(251, 191, 36, .25);
  --c-announce-text: #fbbf24;
  --c-announce-close: #fbbf24;
  --c-announce-close-hover: rgba(255, 255, 255, .08);
  --c-kbd-bg: rgba(255, 255, 255, .08);
  --c-kbd-border: rgba(255, 255, 255, .15);
  --c-kbd-shadow: rgba(255, 255, 255, .06);
  --c-footer-border: rgba(255, 255, 255, .06);
  --c-title-grad-1: #818cf8;
  --c-title-grad-2: #c084fc;
  --c-title-grad-3: #f472b6;
  --c-title-shadow: rgba(129, 140, 248, .3);
  --c-btn-hover-shadow: 0 0 20px rgba(129, 140, 248, .3);
  --c-glow-strength: 1;

  --glass-blur: 18px;
  --backdrop-filter: blur(var(--glass-blur));
  --glass-border: 1px solid rgba(255, 255, 255, .12);
}

/* --- Smooth theme transition on key properties --- */
body,
.section,
.domain-card,
.download-card,
.tip-card,
.blocked-item,
.announcement,
.footer,
kbd {
  transition:
    background-color var(--theme-transition),
    border-color var(--theme-transition),
    color var(--theme-transition),
    box-shadow var(--theme-transition);
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* --- Background Canvas --- */
#bgCanvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  transition: opacity var(--theme-transition);
}

a {
  color: var(--c-primary);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover {
  color: var(--c-primary-hover);
}

kbd {
  display: inline-block;
  padding: 2px 6px;
  font-size: .75rem;
  font-family: inherit;
  background: var(--c-kbd-bg);
  border: 1px solid var(--c-kbd-border);
  border-radius: 4px;
  box-shadow: 0 1px 0 var(--c-kbd-shadow);
  color: var(--c-text-secondary);
}

/* --- Top gradient bar --- */
.top-bar {
  height: 4px;
  background: linear-gradient(90deg, #6366f1, #a855f7, #ec4899, #f59e0b);
  background-size: 200% 100%;
  animation: gradientSlide 4s ease infinite;
  position: sticky;
  top: 0;
  z-index: 100;
}

@keyframes gradientSlide {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

/* --- Container --- */
.container {
  position: relative;
  z-index: 1;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 20px 60px;
}

/* --- Header --- */
.header {
  padding: 40px 0 20px;
  text-align: center;
  position: relative;
}

.logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-bottom: 12px;
}

.logo-icon {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
}

.site-title {
  font-size: 1.8rem;
  font-weight: 900;
  letter-spacing: -.02em;
  background: linear-gradient(135deg, var(--c-title-grad-1), var(--c-title-grad-2), var(--c-title-grad-3), var(--c-title-grad-1));
  background-size: 300% 300%;
  animation: titleShimmer 6s ease infinite;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 20px var(--c-title-shadow));
}

@keyframes titleShimmer {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.site-subtitle {
  font-size: .9rem;
  color: var(--c-text-secondary);
  margin-top: 2px;
}

.header-tip {
  margin-top: 10px;
  font-size: .8rem;
  color: var(--c-text-muted);
}

/* --- Theme Toggle --- */
.theme-toggle {
  position: absolute;
  top: 40px;
  right: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--c-card-bg);
  border: 1px solid var(--c-card-border);
  border-radius: 50%;
  cursor: pointer;
  color: var(--c-text-secondary);
  font-size: 1.1rem;
  transition: all var(--transition);
  z-index: 10;
}
.theme-toggle:hover {
  border-color: var(--c-primary);
  color: var(--c-primary);
  transform: rotate(15deg);
  box-shadow: 0 2px 12px rgba(99, 102, 241, .15);
}

.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
  position: absolute;
  transition: opacity .3s ease, transform .3s ease;
}

.theme-toggle .icon-moon {
  opacity: 1;
  transform: rotate(0deg);
}
.theme-toggle .icon-sun {
  opacity: 0;
  transform: rotate(-90deg);
}

[data-theme="dark"] .theme-toggle .icon-moon {
  opacity: 0;
  transform: rotate(90deg);
}
[data-theme="dark"] .theme-toggle .icon-sun {
  opacity: 1;
  transform: rotate(0deg);
}

/* --- Announcement --- */
.announcement {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--c-announce-bg);
  backdrop-filter: var(--backdrop-filter);
  -webkit-backdrop-filter: var(--backdrop-filter);
  border: 1px solid var(--c-announce-border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  margin-bottom: 24px;
  animation: slideDown .3s ease;
}

.announcement[hidden] {
  display: none;
}

.announcement-icon {
  flex-shrink: 0;
  font-size: 1.1rem;
  line-height: 1.5;
  align-self: flex-start;
}

.announcement-text {
  flex: 1;
  font-size: .88rem;
  color: var(--c-announce-text);
  line-height: 1.5;
}

.announcement-close {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  font-size: 1.2rem;
  color: var(--c-announce-close);
  cursor: pointer;
  border-radius: 4px;
  transition: background var(--transition);
}
.announcement-close:hover {
  background: var(--c-announce-close-hover);
}

/* --- Sections (Glassmorphism) --- */
.section {
  position: relative;
  background: var(--c-surface);
  backdrop-filter: var(--backdrop-filter);
  -webkit-backdrop-filter: var(--backdrop-filter);
  border-radius: var(--radius);
  border: var(--glass-border);
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: var(--c-section-shadow);
}

.section:hover {
  border-color: var(--c-section-hover-border);
  box-shadow: var(--c-section-hover-shadow);
}

.section-muted {
  background: var(--c-surface-alt);
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
  flex-wrap: wrap;
  gap: 8px;
}

.section-title {
  font-size: 1.1rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

.section-icon {
  font-size: 1rem;
}

.section-desc {
  font-size: .85rem;
  color: var(--c-text-secondary);
  margin-bottom: 16px;
}

/* --- Badges --- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  font-size: .75rem;
  font-weight: 600;
  border-radius: 20px;
}
.badge-success {
  background: var(--c-success-bg);
  color: var(--c-success-text);
}
.badge-danger {
  background: var(--c-danger-bg);
  color: var(--c-danger-text);
}

.version-tag {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  font-size: .75rem;
  font-weight: 600;
  border-radius: 20px;
  background: var(--c-primary-light);
  color: var(--c-primary);
}

/* --- Domain Cards --- */
.domain-grid {
  display: grid;
  gap: 10px;
}

.domain-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  background: var(--c-card-bg);
  border: 1px solid var(--c-card-border);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  cursor: pointer;
  text-decoration: none;
  color: inherit;
}
.domain-card:hover {
  border-color: var(--c-card-hover-border);
  background: var(--c-card-hover-bg);
  box-shadow: var(--c-card-hover-shadow);
  transform: translateY(-2px);
  color: inherit;
}

.domain-card-left {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.domain-card-special {
  font-size: .85rem;
  color: var(--c-title-grad-2);
}

@media screen and (max-width: 431px) {
  .domain-card-special {
    display: none;
  }
  .domain-url {
    max-width: 12rem;
  }
}

.domain-status {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}
.domain-status.active {
  background: var(--c-success);
  box-shadow: 0 0 8px rgba(34, 197, 94, .5);
  animation: pulse 3s ease-in-out infinite;
}
.domain-status.proxy {
  background: var(--c-proxy);
}
.domain-status.blocked {
  background: var(--c-danger);
}

.domain-url {
  font-size: .95rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.domain-label {
  font-size: .78rem;
  color: var(--c-text-muted);
  margin-top: 1px;
}

.domain-card-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.latency {
  font-size: .75rem;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 4px;
  white-space: nowrap;
}
.latency.fast {
  background: var(--c-success-bg);
  color: var(--c-success-text);
}
.latency.medium {
  background: var(--c-warning-bg);
  color: var(--c-warning-text);
}
.latency.slow {
  background: var(--c-danger-bg);
  color: var(--c-danger-text);
}
.latency.testing {
  background: var(--c-card-bg);
  color: var(--c-text-muted);
}
.latency.error {
  background: var(--c-danger-bg);
  color: var(--c-danger-text);
}

.arrow-icon {
  color: var(--c-text-muted);
  transition: transform var(--transition);
}
.domain-card:hover .arrow-icon {
  transform: translateX(3px);
  color: var(--c-primary);
}

/* --- Blocked Domains --- */
.blocked-details summary {
  list-style: none;
}
.blocked-details summary::-webkit-details-marker {
  display: none;
}

.blocked-summary {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  padding: 2px 0;
  user-select: none;
}

.chevron-icon {
  margin-left: auto;
  color: var(--c-text-muted);
  transition: transform .25s ease;
}
.blocked-details[open] .chevron-icon {
  transform: rotate(180deg);
}

.blocked-content {
  margin-top: 12px;
}

.blocked-list {
  display: grid;
  gap: 8px;
}

.blocked-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-radius: var(--radius-xs);
  background: var(--c-card-bg);
  border: 1px solid var(--c-card-border);
  font-size: .88rem;
}

.blocked-item-url {
  text-decoration: line-through;
  color: var(--c-text-muted);
}

.blocked-item-date {
  font-size: .75rem;
  color: var(--c-text-muted);
  white-space: nowrap;
}

/* --- Download --- */
.download-grid {
  display: grid;
  gap: 16px;
}

@media (min-width: 600px) {
  .download-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.download-card {
  background: var(--c-card-bg);
  border: 1px solid var(--c-card-border);
  border-radius: var(--radius-sm);
  padding: 20px;
  text-align: center;
  transition: all var(--transition);
}
.download-card:hover {
  border-color: var(--c-primary);
  background: var(--c-card-hover-bg);
  box-shadow: var(--c-card-hover-shadow);
  transform: translateY(-2px);
}

.download-platform-icon {
  width: 36px;
  height: 36px;
  margin: 0 auto 10px;
  color: var(--c-text-secondary);
}

.download-platform-name {
  font-size: .95rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.download-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.download-link-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 10px;
  border-radius: var(--radius-xs);
  background: rgba(99, 102, 241, .04);
  border: 1px solid rgba(99, 102, 241, .08);
}

.download-link-title {
  font-size: .8rem;
  font-weight: 700;
  color: var(--c-text);
}

.download-accelerated {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 14px;
  font-size: .82rem;
  font-weight: 500;
  color: var(--c-primary);
  background: var(--c-primary-light);
  border: 1px solid rgba(99, 102, 241, .15);
  border-radius: var(--radius-xs);
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  font-family: inherit;
}
.download-btn:hover {
  background: var(--c-primary);
  color: #fff;
  box-shadow: var(--c-btn-hover-shadow);
}

.download-btn-accelerated {
  background: linear-gradient(135deg, #66bb8a, #7fd39f);
  color: #fff;
  border-color: transparent;
  font-weight: 700;
}

.download-btn-accelerated:hover {
  background: linear-gradient(135deg, #57ad7d, #70c592);
  color: #fff;
  box-shadow: 0 8px 24px rgba(102, 187, 138, .18);
}

.download-btn svg {
  width: 14px;
  height: 14px;
}


/* --- Tips --- */
.tips-grid {
  display: grid;
  gap: 12px;
}
@media (min-width: 600px) {
  .tips-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.tip-card {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  background: var(--c-card-bg);
  border-radius: var(--radius-sm);
  border: 1px solid var(--c-card-border);
  transition: all var(--transition);
}
.tip-card:hover {
  border-color: var(--c-section-hover-border);
  background: var(--c-card-hover-bg);
}

.tip-num {
  width: 26px;
  height: 26px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .78rem;
  font-weight: 700;
  color: var(--c-primary);
  background: var(--c-primary-light);
  border-radius: 50%;
}

.tip-card p {
  font-size: .85rem;
  color: var(--c-text-secondary);
  line-height: 1.5;
}

/* --- Footer --- */
.footer {
  text-align: center;
  padding: 30px 0 10px;
  border-top: 1px solid var(--c-footer-border);
  margin-top: 10px;
}

.footer p {
  font-size: .8rem;
  color: var(--c-text-muted);
}

.footer-links {
  margin-top: 8px;
  display: flex;
  justify-content: center;
  gap: 20px;
}

.footer-links a {
  font-size: .82rem;
  color: var(--c-text-secondary);
  transition: color var(--transition);
}
.footer-links a:hover {
  color: var(--c-primary);
}

.footer-credit {
  margin-top: 12px;
  font-size: .72rem;
  color: var(--c-text-muted);
  opacity: .7;
}
.footer-credit a {
  color: var(--c-primary);
  font-weight: 500;
  transition: all var(--transition);
}
.footer-credit a:hover {
  color: var(--c-primary-hover);
  text-shadow: 0 0 10px var(--c-title-shadow);
}

/* --- Animations --- */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .5; }
}

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

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- Glow hover for sections (dark mode only via opacity) --- */
.section::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  background: linear-gradient(135deg,
    rgba(99, 102, 241, 0) 0%,
    rgba(168, 85, 247, .2) 50%,
    rgba(236, 72, 153, 0) 100%
  );
  opacity: 0;
  transition: opacity .4s ease;
  z-index: -1;
  pointer-events: none;
}

.section:hover::before {
  opacity: var(--c-glow-strength);
}

/* --- Responsive --- */
@media (max-width: 520px) {
  .header {
    padding: 28px 0 16px;
  }
  .logo {
    flex-direction: column;
    gap: 8px;
  }
  .site-title {
    font-size: 1.5rem;
  }
  .section {
    padding: 18px 14px;
  }
  .domain-card {
    padding: 12px 14px;
  }
  .download-grid {
    grid-template-columns: 1fr;
  }
  .theme-toggle {
    top: 28px;
  }
}