/* ==========================================================================
   栈里有物 · 软件下载站  —  设计系统与前台样式
   风格：现代玻璃拟态（Glassmorphism）· 信任蓝 + 活力橙
   ========================================================================== */

/* ---------------- 字体 ---------------- */
@font-face {
  font-family: 'Space Grotesk';
  src: url('../fonts/SpaceGrotesk-500.woff2') format('woff2');
  font-weight: 500;
  font-display: swap;
  font-style: normal;
}
@font-face {
  font-family: 'Space Grotesk';
  src: url('../fonts/SpaceGrotesk-700.woff2') format('woff2');
  font-weight: 700;
  font-display: swap;
  font-style: normal;
}
@font-face {
  font-family: 'DM Sans';
  src: url('../fonts/DMSans-400.woff2') format('woff2');
  font-weight: 400;
  font-display: swap;
  font-style: normal;
}
@font-face {
  font-family: 'DM Sans';
  src: url('../fonts/DMSans-500.woff2') format('woff2');
  font-weight: 500;
  font-display: swap;
  font-style: normal;
}

/* ---------------- 设计令牌 ---------------- */
:root {
  /* 颜色 */
  --color-primary:          #2563EB;
  --color-primary-600:      #1D4ED8;
  --color-primary-soft:     #E4EDFD;
  --color-on-primary:       #FFFFFF;
  --color-secondary:        #3B82F6;
  --color-accent:           #EA580C;
  --color-accent-soft:      #FDEDE3;
  --color-on-accent:        #FFFFFF;
  --color-background:       #F8FAFC;
  --color-foreground:       #1E293B;
  --color-card:             #FFFFFF;
  --color-card-foreground:  #1E293B;
  --color-muted:            #E9EFF8;
  --color-muted-foreground: #475569;
  --color-subtle:           #94A3B8;
  --color-border:           #E2E8F0;
  --color-destructive:      #DC2626;
  --color-success:          #059669;
  --color-warning:          #D97706;
  --color-ring:             #2563EB;

  /* 玻璃层 */
  --glass-bg:      rgba(255, 255, 255, 0.72);
  --glass-bg-soft: rgba(255, 255, 255, 0.55);
  --glass-border:  rgba(255, 255, 255, 0.75);
  --glass-blur:    16px;
  --glass-shadow:  0 1px 2px rgba(15, 23, 42, .04), 0 12px 32px -12px rgba(15, 23, 42, .14);
  --glass-shine:   linear-gradient(140deg, rgba(255,255,255,.65) 0%, rgba(255,255,255,0) 42%);

  /* 圆角 */
  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-pill: 999px;

  /* 间距（标准密度） */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .05);
  --shadow-md: 0 4px 14px -4px rgba(15, 23, 42, .12);
  --shadow-lg: 0 20px 48px -20px rgba(15, 23, 42, .24);
  --shadow-primary: 0 10px 26px -10px rgba(37, 99, 235, .55);

  /* 排版 */
  --font-display: 'Space Grotesk', 'PingFang SC', 'HarmonyOS Sans SC', 'Microsoft YaHei', system-ui, sans-serif;
  --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;

  /* 动效 */
  --ease-out: cubic-bezier(.22, 1, .36, 1);
  --ease-spring: cubic-bezier(.34, 1.56, .64, 1);
  --dur-fast: 140ms;
  --dur: 220ms;
  --dur-slow: 380ms;

  --container: 1240px;
  --header-h: 68px;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-foreground);
  background: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: -.015em;
  margin: 0;
  color: var(--color-foreground);
}

h1 { font-size: clamp(1.9rem, 1.3rem + 2.2vw, 3rem); }
h2 { font-size: clamp(1.45rem, 1.1rem + 1.2vw, 2rem); }
h3 { font-size: clamp(1.15rem, 1rem + .5vw, 1.4rem); }
h4 { font-size: 1.05rem; }

p { margin: 0 0 1em; }
a { color: var(--color-primary); text-decoration: none; transition: color var(--dur-fast) var(--ease-out); }
a:hover { color: var(--color-primary-600); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button, input, select, textarea { font: inherit; color: inherit; }
hr { border: 0; border-top: 1px solid var(--color-border); margin: var(--space-6) 0; }

::selection { background: var(--color-primary); color: #fff; }

/* 可见焦点环（可访问性） */
:focus-visible {
  outline: 2px solid var(--color-ring);
  outline-offset: 2px;
  border-radius: var(--radius-xs);
}

/* 跳转到主内容 */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 8px;
  z-index: 999;
  padding: 10px 18px;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-sm);
}
.skip-link:focus { left: 16px; }

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ---------------- 动态背景 ---------------- */
.bg-aurora {
  position: fixed;
  inset: 0;
  z-index: -2;
  overflow: hidden;
  pointer-events: none;
  background:
    radial-gradient(1100px 620px at 12% -8%, rgba(37, 99, 235, .16), transparent 62%),
    radial-gradient(900px 520px at 88% 4%, rgba(234, 88, 12, .10), transparent 58%),
    radial-gradient(1000px 680px at 60% 108%, rgba(59, 130, 246, .13), transparent 62%),
    var(--color-background);
}
.bg-aurora::before,
.bg-aurora::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: .5;
}
.bg-aurora::before {
  width: 46vw; height: 46vw;
  left: -8vw; top: 6vh;
  background: radial-gradient(circle at 30% 30%, rgba(96, 165, 250, .55), rgba(96, 165, 250, 0) 68%);
  animation: float-a 26s var(--ease-out) infinite alternate;
}
.bg-aurora::after {
  width: 40vw; height: 40vw;
  right: -6vw; top: 28vh;
  background: radial-gradient(circle at 60% 40%, rgba(251, 146, 60, .40), rgba(251, 146, 60, 0) 68%);
  animation: float-b 32s var(--ease-out) infinite alternate;
}
.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(148, 163, 184, .09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, .09) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 120% 80% at 50% 0%, #000 20%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 120% 80% at 50% 0%, #000 20%, transparent 78%);
}
@keyframes float-a {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to   { transform: translate3d(6vw, 5vh, 0) scale(1.14); }
}
@keyframes float-b {
  from { transform: translate3d(0, 0, 0) scale(1.08); }
  to   { transform: translate3d(-5vw, -6vh, 0) scale(.94); }
}

/* ---------------- 布局 ---------------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-5);
}
.container--narrow { max-width: 900px; }
.container--wide { max-width: 1440px; }

.page { padding-bottom: var(--space-20); min-height: 60vh; }
.page-head { padding: var(--space-10) 0 var(--space-6); }

.section { padding: var(--space-12) 0; }
.section--tight { padding: var(--space-8) 0; }

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
}
.section-head__title { display: flex; align-items: center; gap: var(--space-3); }
.section-head h2 { margin: 0; }
.section-head__sub {
  color: var(--color-muted-foreground);
  font-size: .95rem;
  margin: 4px 0 0;
}
.section-head__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  border-radius: var(--radius-sm);
  background: var(--color-primary-soft);
  color: var(--color-primary);
  flex-shrink: 0;
}

/* ---------------- 玻璃卡片 ---------------- */
.glass {
  position: relative;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(160%);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(160%);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  border-radius: var(--radius-lg);
}
.glass::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: var(--glass-shine);
  pointer-events: none;
  opacity: .8;
}
.glass > * { position: relative; z-index: 1; }

.card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--dur) var(--ease-out), box-shadow var(--dur) var(--ease-out), border-color var(--dur) var(--ease-out);
}
.card--pad { padding: var(--space-6); }

/* ---------------- 按钮 ---------------- */
.btn {
  --btn-bg: var(--color-primary);
  --btn-fg: var(--color-on-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 44px;
  padding: 0 var(--space-5);
  font-family: var(--font-body);
  font-size: .94rem;
  font-weight: 600;
  line-height: 1;
  color: var(--btn-fg);
  background: var(--btn-bg);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  white-space: nowrap;
  text-decoration: none;
  transition: transform var(--dur-fast) var(--ease-out), box-shadow var(--dur) var(--ease-out), background-color var(--dur-fast) var(--ease-out), opacity var(--dur-fast) var(--ease-out);
}
.btn:hover { color: var(--btn-fg); transform: translateY(-1px); }
.btn:active { transform: translateY(0) scale(.985); }
.btn svg { width: 18px; height: 18px; flex-shrink: 0; }

.btn--primary { --btn-bg: var(--color-primary); box-shadow: var(--shadow-primary); }
.btn--primary:hover { background: var(--color-primary-600); }

.btn--accent { --btn-bg: var(--color-accent); box-shadow: 0 10px 26px -10px rgba(234, 88, 12, .5); }

.btn--ghost {
  --btn-bg: transparent;
  --btn-fg: var(--color-foreground);
  border-color: var(--color-border);
  background: rgba(255, 255, 255, .6);
  backdrop-filter: blur(8px);
}
.btn--ghost:hover { background: #fff; border-color: var(--color-primary); color: var(--color-primary); }

.btn--soft {
  --btn-bg: var(--color-primary-soft);
  --btn-fg: var(--color-primary);
}
.btn--soft:hover { background: #d7e5fc; }

.btn--danger { --btn-bg: var(--color-destructive); }
.btn--danger:hover { background: #b91c1c; }

.btn--white {
  --btn-bg: #fff;
  --btn-fg: var(--color-primary);
}

.btn--sm { min-height: 34px; padding: 0 var(--space-3); font-size: .84rem; border-radius: var(--radius-xs); }
.btn--sm svg { width: 15px; height: 15px; }
.btn--lg { min-height: 52px; padding: 0 var(--space-8); font-size: 1rem; border-radius: var(--radius-md); }
.btn--block { width: 100%; }
.btn--icon { padding: 0; width: 42px; }
.btn--icon.btn--sm { width: 34px; }
.btn:disabled, .btn.is-disabled { opacity: .55; pointer-events: none; }

/* ---------------- 徽章 ---------------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  font-size: .76rem;
  font-weight: 600;
  line-height: 1.5;
  border-radius: var(--radius-pill);
  background: var(--color-muted);
  color: var(--color-muted-foreground);
  white-space: nowrap;
}
.badge svg { width: 13px; height: 13px; }
.badge--blue   { background: #E4EDFD; color: #1D4ED8; }
.badge--green  { background: #DCFCE7; color: #15803D; }
.badge--amber  { background: #FEF3C7; color: #B45309; }
.badge--purple { background: #EDE9FE; color: #6D28D9; }
.badge--red    { background: #FEE2E2; color: #B91C1C; }
.badge--gray   { background: #F1F5F9; color: #475569; }
.badge--orange { background: var(--color-accent-soft); color: #C2410C; }
.badge--outline { background: transparent; border: 1px solid var(--color-border); color: var(--color-muted-foreground); }

/* ---------------- 表单 ---------------- */
.field { margin-bottom: var(--space-5); }
.field__label {
  display: block;
  margin-bottom: var(--space-2);
  font-size: .9rem;
  font-weight: 600;
  color: var(--color-foreground);
}
.field__label .req { color: var(--color-destructive); margin-left: 2px; }
.field__hint { margin-top: 6px; font-size: .82rem; color: var(--color-subtle); }
.field__error { margin-top: 6px; font-size: .82rem; color: var(--color-destructive); display: flex; align-items: center; gap: 4px; }
.field__error svg { width: 14px; height: 14px; }

.input, .select, .textarea {
  width: 100%;
  min-height: 46px;
  padding: 11px var(--space-4);
  font-size: .95rem;
  color: var(--color-foreground);
  background: rgba(255, 255, 255, .82);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: border-color var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) var(--ease-out), background-color var(--dur-fast);
  appearance: none;
}
.textarea { min-height: 120px; resize: vertical; line-height: 1.65; }
.input::placeholder, .textarea::placeholder { color: var(--color-subtle); }
.input:hover, .select:hover, .textarea:hover { border-color: #CBD5E1; }
.input:focus, .select:focus, .textarea:focus {
  outline: none;
  background: #fff;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, .13);
}
.input.is-error, .textarea.is-error { border-color: var(--color-destructive); }
.select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23475569' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 17px;
  padding-right: 40px;
}

.input-group { display: flex; gap: var(--space-3); }
.input-group .input { flex: 1; }

.checkbox, .radio {
  display: inline-flex;
  align-items: flex-start;
  gap: var(--space-2);
  cursor: pointer;
  font-size: .9rem;
  line-height: 1.5;
  min-height: 24px;
}
.checkbox input, .radio input {
  width: 18px; height: 18px;
  margin: 2px 0 0;
  accent-color: var(--color-primary);
  cursor: pointer;
  flex-shrink: 0;
}
.switch {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  cursor: pointer;
  min-height: 24px;
}
.switch input { position: absolute; opacity: 0; width: 0; height: 0; }
.switch__track {
  width: 44px; height: 25px;
  border-radius: var(--radius-pill);
  background: #CBD5E1;
  transition: background-color var(--dur) var(--ease-out);
  position: relative;
  flex-shrink: 0;
}
.switch__track::after {
  content: '';
  position: absolute;
  top: 3px; left: 3px;
  width: 19px; height: 19px;
  border-radius: 50%;
  background: #fff;
  box-shadow: var(--shadow-sm);
  transition: transform var(--dur) var(--ease-spring);
}
.switch input:checked + .switch__track { background: var(--color-primary); }
.switch input:checked + .switch__track::after { transform: translateX(19px); }
.switch input:focus-visible + .switch__track { box-shadow: 0 0 0 4px rgba(37, 99, 235, .2); }

/* ---------------- 顶部导航 ---------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(248, 250, 252, .72);
  backdrop-filter: blur(18px) saturate(170%);
  -webkit-backdrop-filter: blur(18px) saturate(170%);
  border-bottom: 1px solid rgba(226, 232, 240, .8);
  transition: box-shadow var(--dur) var(--ease-out), background-color var(--dur);
}
.site-header.is-scrolled { box-shadow: 0 6px 24px -14px rgba(15, 23, 42, .25); }

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  height: var(--header-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 1.16rem;
  font-weight: 700;
  color: var(--color-foreground);
  letter-spacing: -.02em;
  flex-shrink: 0;
}
.brand:hover { color: var(--color-foreground); }
.brand__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  border-radius: 11px;
  background: linear-gradient(140deg, var(--color-primary), var(--color-secondary) 55%, #60A5FA);
  color: #fff;
  box-shadow: var(--shadow-primary);
  position: relative;
  overflow: hidden;
}
.brand__mark::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(150deg, rgba(255,255,255,.55), transparent 55%);
}
.brand__mark svg { width: 20px; height: 20px; position: relative; z-index: 1; }
.brand__sub {
  font-family: var(--font-body);
  font-size: .68rem;
  font-weight: 500;
  color: var(--color-subtle);
  letter-spacing: .06em;
  display: block;
  margin-top: -2px;
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  margin-left: var(--space-2);
}
.nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 14px;
  font-size: .92rem;
  font-weight: 500;
  color: var(--color-muted-foreground);
  border-radius: var(--radius-sm);
  transition: color var(--dur-fast) var(--ease-out), background-color var(--dur-fast) var(--ease-out);
}
.nav__link:hover { color: var(--color-foreground); background: rgba(255, 255, 255, .8); }
.nav__link.is-active { color: var(--color-primary); background: var(--color-primary-soft); font-weight: 600; }
.nav__link svg { width: 16px; height: 16px; }

.nav__search { flex: 1; max-width: 340px; margin-left: auto; position: relative; }
.nav__search .input { min-height: 40px; padding-left: 40px; border-radius: var(--radius-pill); background: rgba(255,255,255,.72); }
.nav__search__icon {
  position: absolute;
  left: 13px; top: 50%;
  transform: translateY(-50%);
  color: var(--color-subtle);
  pointer-events: none;
  display: flex;
}
.nav__search__icon svg { width: 17px; height: 17px; }

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

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 42px; height: 42px;
  background: rgba(255,255,255,.75);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--color-foreground);
}
.nav-toggle svg { width: 20px; height: 20px; }

/* 用户菜单 */
.user-menu { position: relative; }
.user-menu__trigger {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 5px 12px 5px 5px;
  background: rgba(255,255,255,.78);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: border-color var(--dur-fast), box-shadow var(--dur-fast);
}
.user-menu__trigger:hover { border-color: var(--color-primary); box-shadow: var(--shadow-sm); }
.user-menu__name { font-size: .88rem; font-weight: 600; max-width: 96px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.user-menu__trigger svg { width: 15px; height: 15px; color: var(--color-subtle); }

.avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  object-fit: cover;
  background: linear-gradient(140deg, var(--color-primary), var(--color-secondary));
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: .82rem;
  font-weight: 700;
  flex-shrink: 0;
  overflow: hidden;
}
.avatar--sm { width: 26px; height: 26px; font-size: .72rem; }
.avatar--lg { width: 72px; height: 72px; font-size: 1.6rem; }
.avatar--xl { width: 96px; height: 96px; font-size: 2rem; }

.dropdown {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  min-width: 208px;
  padding: var(--space-2);
  background: rgba(255,255,255,.94);
  backdrop-filter: blur(18px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px) scale(.98);
  transition: opacity var(--dur) var(--ease-out), transform var(--dur) var(--ease-out), visibility var(--dur);
  z-index: 70;
}
.dropdown.is-open { opacity: 1; visibility: visible; transform: translateY(0) scale(1); }
.dropdown__item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  font-size: .9rem;
  color: var(--color-foreground);
  border-radius: var(--radius-xs);
  transition: background-color var(--dur-fast);
}
.dropdown__item:hover { background: var(--color-muted); color: var(--color-foreground); }
.dropdown__item svg { width: 16px; height: 16px; color: var(--color-subtle); }
.dropdown__divider { height: 1px; background: var(--color-border); margin: var(--space-2) 4px; }
.dropdown__head {
  padding: 10px 12px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-2);
}
.dropdown__head strong { display: block; font-size: .9rem; }
.dropdown__head span { font-size: .78rem; color: var(--color-subtle); }

/* 移动端抽屉 */
.mobile-nav {
  position: fixed;
  inset: var(--header-h) 0 0 0;
  z-index: 55;
  background: rgba(248, 250, 252, .97);
  backdrop-filter: blur(20px);
  padding: var(--space-5);
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform var(--dur-slow) var(--ease-out);
  visibility: hidden;
}
.mobile-nav.is-open { transform: translateX(0); visibility: visible; }
.mobile-nav__link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 14px var(--space-4);
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-foreground);
  border-radius: var(--radius-sm);
  border-bottom: 1px solid var(--color-border);
}
.mobile-nav__link svg { width: 18px; height: 18px; color: var(--color-primary); }
.mobile-nav__link.is-active { background: var(--color-primary-soft); color: var(--color-primary); }

/* ---------------- 首屏 Hero ---------------- */
.hero { position: relative; padding: var(--space-16) 0 var(--space-12); }
.hero__inner { display: grid; grid-template-columns: 1.15fr .85fr; gap: var(--space-12); align-items: center; }

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 7px 15px 7px 9px;
  font-size: .82rem;
  font-weight: 600;
  color: var(--color-primary);
  background: rgba(255,255,255,.8);
  border: 1px solid rgba(37, 99, 235, .18);
  border-radius: var(--radius-pill);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
}
.hero__badge span.dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--color-success);
  box-shadow: 0 0 0 4px rgba(5, 150, 105, .16);
  animation: pulse 2.4s var(--ease-out) infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .55; transform: scale(.86); }
}

.hero h1 { margin: var(--space-5) 0 var(--space-4); }
.hero h1 .grad {
  background: linear-gradient(120deg, var(--color-primary) 8%, var(--color-secondary) 48%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero__sub {
  font-size: clamp(1rem, .95rem + .3vw, 1.14rem);
  color: var(--color-muted-foreground);
  max-width: 34em;
  line-height: 1.72;
  margin-bottom: var(--space-8);
}
.hero__cta { display: flex; gap: var(--space-3); flex-wrap: wrap; margin-bottom: var(--space-8); }

.hero__stats { display: flex; gap: var(--space-8); flex-wrap: wrap; }
.hero__stat strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.65rem;
  font-weight: 700;
  color: var(--color-foreground);
  letter-spacing: -.02em;
}
.hero__stat span { font-size: .84rem; color: var(--color-subtle); }

/* 悬浮软件预览 */
.hero__panel { position: relative; }
.float-card {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: rgba(255,255,255,.82);
  backdrop-filter: blur(16px) saturate(160%);
  border: 1px solid rgba(255,255,255,.85);
  border-radius: var(--radius-md);
  box-shadow: var(--glass-shadow);
  animation: float-y 6s var(--ease-out) infinite alternate;
}
.float-card + .float-card { margin-top: var(--space-4); }
.float-card:nth-child(2) { animation-delay: -2s; margin-left: var(--space-8); }
.float-card:nth-child(3) { animation-delay: -4s; }
.float-card__meta { min-width: 0; flex: 1; }
.float-card__title { font-weight: 600; font-size: .93rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.float-card__sub { font-size: .78rem; color: var(--color-subtle); }
@keyframes float-y {
  from { transform: translateY(0); }
  to   { transform: translateY(-14px); }
}

/* ---------------- 软件图标 ---------------- */
.app-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 26%;
  overflow: hidden;
  flex-shrink: 0;
  font-family: var(--font-display);
  font-weight: 700;
  color: #fff;
  position: relative;
  box-shadow: 0 6px 16px -6px rgba(15, 23, 42, .35), inset 0 1px 0 rgba(255,255,255,.35);
  background: linear-gradient(140deg, #2563EB, #3B82F6);
}
.app-icon::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(150deg, rgba(255,255,255,.42), transparent 52%);
  pointer-events: none;
}
.app-icon img { width: 100%; height: 100%; object-fit: cover; position: relative; z-index: 1; }
.app-icon--xs { width: 34px; height: 34px; font-size: .95rem; border-radius: 24%; }
.app-icon--sm { width: 44px; height: 44px; font-size: 1.15rem; }
.app-icon--md { width: 62px; height: 62px; font-size: 1.6rem; }
.app-icon--lg { width: 92px; height: 92px; font-size: 2.4rem; border-radius: 24%; }
.app-icon--xl { width: 116px; height: 116px; font-size: 3rem; border-radius: 23%; }

/* ---------------- 软件卡片 ---------------- */
.app-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(272px, 1fr));
  gap: var(--space-5);
}
.app-grid--wide { grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); }

.app-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-5);
  background: rgba(255, 255, 255, .78);
  backdrop-filter: blur(14px) saturate(150%);
  -webkit-backdrop-filter: blur(14px) saturate(150%);
  border: 1px solid rgba(255,255,255,.8);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-shadow);
  transition: transform var(--dur) var(--ease-out), box-shadow var(--dur) var(--ease-out), border-color var(--dur) var(--ease-out);
  position: relative;
  overflow: hidden;
}
.app-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary), var(--color-accent));
  opacity: 0;
  transition: opacity var(--dur) var(--ease-out);
}
.app-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 22px 46px -20px rgba(15, 23, 42, .3);
  border-color: rgba(37, 99, 235, .3);
}
.app-card:hover::before { opacity: 1; }

.app-card__head { display: flex; gap: var(--space-4); align-items: flex-start; }
.app-card__info { min-width: 0; flex: 1; }
.app-card__title {
  font-family: var(--font-display);
  font-size: 1.04rem;
  font-weight: 700;
  color: var(--color-foreground);
  margin: 0 0 3px;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.app-card__title a { color: inherit; }
.app-card__title a::after { content: ''; position: absolute; inset: 0; }
.app-card__title a:hover { color: var(--color-primary); }
.app-card__developer {
  font-size: .8rem;
  color: var(--color-subtle);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.app-card__desc {
  font-size: .87rem;
  line-height: 1.6;
  color: var(--color-muted-foreground);
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 2.8em;
}
.app-card__tags { display: flex; flex-wrap: wrap; gap: 6px; }
.app-card__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid rgba(226, 232, 240, .8);
  margin-top: auto;
}
.app-card__metrics { display: flex; align-items: center; gap: var(--space-4); font-size: .8rem; color: var(--color-subtle); }
.app-card__metrics span { display: inline-flex; align-items: center; gap: 4px; }
.app-card__metrics svg { width: 14px; height: 14px; }

.app-card__flag {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  z-index: 2;
}

/* 列表行卡片（排行榜等） */
.app-row {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  transition: background-color var(--dur-fast) var(--ease-out);
}
.app-row:hover { background: rgba(255,255,255,.86); }
.app-row__rank {
  width: 26px;
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-subtle);
  text-align: center;
  flex-shrink: 0;
}
.app-row__rank--top1 { color: #D97706; }
.app-row__rank--top2 { color: #64748B; }
.app-row__rank--top3 { color: #B45309; }
.app-row__body { min-width: 0; flex: 1; }
.app-row__title { font-weight: 600; font-size: .94rem; margin: 0 0 2px; }
.app-row__title a { color: inherit; }
.app-row__title a:hover { color: var(--color-primary); }
.app-row__meta { font-size: .78rem; color: var(--color-subtle); display: flex; gap: var(--space-3); flex-wrap: wrap; }
.app-row__value { font-family: var(--font-display); font-weight: 700; color: var(--color-primary); font-size: .92rem; }

/* ---------------- 分类卡 ---------------- */
.cat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(158px, 1fr)); gap: var(--space-4); }
.cat-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-5) var(--space-4);
  background: rgba(255,255,255,.76);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,.8);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform var(--dur) var(--ease-out), box-shadow var(--dur) var(--ease-out);
  color: var(--color-foreground);
}
.cat-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); color: var(--color-primary); }
.cat-card__icon {
  width: 40px; height: 40px;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  transition: transform var(--dur) var(--ease-spring);
}
.cat-card:hover .cat-card__icon { transform: scale(1.08) rotate(-4deg); }
.cat-card__icon svg { width: 20px; height: 20px; }
.cat-card__name { font-weight: 600; font-size: .94rem; }
.cat-card__count { font-size: .78rem; color: var(--color-subtle); }

/* ---------------- 标签云 ---------------- */
.tag-cloud { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.tag-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 13px;
  font-size: .82rem;
  color: var(--color-muted-foreground);
  background: rgba(255,255,255,.75);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  transition: all var(--dur-fast) var(--ease-out);
}
.tag-chip:hover { color: var(--color-primary); border-color: var(--color-primary); background: #fff; transform: translateY(-1px); }
.tag-chip__count { font-size: .72rem; color: var(--color-subtle); }

/* ---------------- 筛选栏 ---------------- */
.filter-bar {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  padding: var(--space-4) var(--space-5);
  margin-bottom: var(--space-6);
}
.filter-bar__group { display: flex; align-items: center; gap: var(--space-2); flex-wrap: wrap; }
.filter-bar__label { font-size: .82rem; font-weight: 600; color: var(--color-subtle); white-space: nowrap; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 14px;
  font-size: .85rem;
  font-weight: 500;
  color: var(--color-muted-foreground);
  background: rgba(255,255,255,.7);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  transition: all var(--dur-fast) var(--ease-out);
  white-space: nowrap;
  cursor: pointer;
}
.chip:hover { border-color: var(--color-primary); color: var(--color-primary); }
.chip.is-active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
  box-shadow: 0 6px 16px -8px rgba(37, 99, 235, .7);
}
.chip__count { font-size: .74rem; opacity: .75; }

/* ---------------- 面包屑 ---------------- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: .84rem;
  color: var(--color-subtle);
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--color-muted-foreground); }
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb svg { width: 14px; height: 14px; opacity: .6; }
.breadcrumb__current { color: var(--color-foreground); font-weight: 500; }

/* ---------------- 软件详情 ---------------- */
.detail-hero {
  padding: var(--space-8);
  margin-bottom: var(--space-8);
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--space-6);
  align-items: start;
}
.detail-hero__meta { display: flex; flex-direction: column; gap: var(--space-3); min-width: 0; }
.detail-hero__title { font-size: clamp(1.4rem, 1.2rem + .8vw, 1.9rem); margin: 0; }
.detail-hero__sub { color: var(--color-muted-foreground); font-size: .95rem; margin: 0; }
.detail-hero__facts { display: flex; flex-wrap: wrap; gap: var(--space-3) var(--space-5); font-size: .85rem; color: var(--color-muted-foreground); }
.detail-hero__facts span { display: inline-flex; align-items: center; gap: 6px; }
.detail-hero__facts svg { width: 15px; height: 15px; color: var(--color-subtle); }
.detail-hero__actions { display: flex; flex-direction: column; gap: var(--space-3); align-items: stretch; min-width: 190px; }

.detail-layout { display: grid; grid-template-columns: minmax(0, 1fr) 316px; gap: var(--space-8); align-items: start; }
.detail-main { display: flex; flex-direction: column; gap: var(--space-6); min-width: 0; }
.detail-side { display: flex; flex-direction: column; gap: var(--space-6); position: sticky; top: calc(var(--header-h) + 20px); }

.panel { padding: var(--space-6); }
.panel__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
  flex-wrap: wrap;
}
.panel__title { display: flex; align-items: center; gap: 10px; font-size: 1.06rem; font-weight: 700; margin: 0; font-family: var(--font-display); }
.panel__title svg { width: 19px; height: 19px; color: var(--color-primary); }

/* 截图 */
.shots { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: var(--space-4); }
.shot {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-muted);
  aspect-ratio: 16 / 10;
  cursor: zoom-in;
  position: relative;
}
.shot img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--dur-slow) var(--ease-out); }
.shot:hover img { transform: scale(1.05); }

/* 版本表 */
.version-list { display: flex; flex-direction: column; gap: var(--space-3); }
.version-item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: rgba(255,255,255,.6);
  transition: border-color var(--dur-fast), background-color var(--dur-fast);
}
.version-item:hover { border-color: rgba(37,99,235,.35); background: #fff; }
.version-item__body { flex: 1; min-width: 0; }
.version-item__ver { font-weight: 700; font-family: var(--font-display); display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.version-item__meta { font-size: .8rem; color: var(--color-subtle); display: flex; gap: var(--space-4); flex-wrap: wrap; margin-top: 4px; }

/* 富文本内容 */
.rich { font-size: .96rem; line-height: 1.85; color: var(--color-muted-foreground); }
.rich > *:first-child { margin-top: 0; }
.rich > *:last-child { margin-bottom: 0; }
.rich h2, .rich h3, .rich h4 { margin: var(--space-6) 0 var(--space-3); color: var(--color-foreground); }
.rich h3 { font-size: 1.16rem; }
.rich h4 { font-size: 1.02rem; }
.rich p { margin: 0 0 var(--space-4); }
.rich ul, .rich ol { margin: 0 0 var(--space-4); padding-left: 1.4em; }
.rich ul { list-style: disc; }
.rich ol { list-style: decimal; }
.rich li { margin-bottom: 6px; }
.rich li::marker { color: var(--color-primary); }
.rich a { text-decoration: underline; text-underline-offset: 3px; }
.rich img { border-radius: var(--radius-md); margin: var(--space-4) 0; box-shadow: var(--shadow-md); }
.rich blockquote {
  margin: var(--space-4) 0;
  padding: var(--space-4) var(--space-5);
  background: var(--color-primary-soft);
  border-left: 3px solid var(--color-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--color-foreground);
}
.rich code {
  font-family: var(--font-mono);
  font-size: .87em;
  padding: 2px 6px;
  background: var(--color-muted);
  border-radius: var(--radius-xs);
  color: #1D4ED8;
}
.rich pre {
  background: #0F172A;
  color: #E2E8F0;
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-md);
  overflow-x: auto;
  font-size: .86rem;
  line-height: 1.7;
  margin: 0 0 var(--space-4);
}
.rich pre code { background: transparent; color: inherit; padding: 0; }
.rich table { width: 100%; border-collapse: collapse; margin: 0 0 var(--space-4); font-size: .9rem; }
.rich th, .rich td { padding: 10px 14px; border: 1px solid var(--color-border); text-align: left; }
.rich th { background: var(--color-muted); font-weight: 600; color: var(--color-foreground); }

/* ---------------- 评分与星级 ---------------- */
.stars { display: inline-flex; gap: 2px; vertical-align: middle; }
.star { width: 15px; height: 15px; fill: #CBD5E1; stroke: none; }
.star--on { fill: #F59E0B; }
.star--half { fill: url(#halfGrad); }

.rating-display { display: flex; align-items: center; gap: var(--space-3); }
.rating-display__score {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--color-foreground);
  line-height: 1;
}
.rating-display__meta { font-size: .78rem; color: var(--color-subtle); }

/* 评分选择 */
.rate-picker { display: inline-flex; gap: 3px; flex-direction: row-reverse; }
.rate-picker input { position: absolute; opacity: 0; width: 0; height: 0; }
.rate-picker label {
  cursor: pointer;
  color: #CBD5E1;
  transition: color var(--dur-fast), transform var(--dur-fast) var(--ease-spring);
  display: inline-flex;
}
.rate-picker label svg { width: 26px; height: 26px; fill: currentColor; stroke: none; }
.rate-picker label:hover,
.rate-picker label:hover ~ label,
.rate-picker input:checked ~ label { color: #F59E0B; }
.rate-picker label:hover { transform: scale(1.14); }
.rate-picker input:focus-visible + label { outline: 2px solid var(--color-ring); outline-offset: 3px; border-radius: 4px; }

/* ---------------- 评论 ---------------- */
.comment-list { display: flex; flex-direction: column; gap: var(--space-5); }
.comment { display: flex; gap: var(--space-4); }
.comment__body { flex: 1; min-width: 0; }
.comment__head { display: flex; align-items: center; gap: var(--space-3); margin-bottom: 6px; flex-wrap: wrap; }
.comment__author { font-weight: 600; font-size: .92rem; }
.comment__time { font-size: .78rem; color: var(--color-subtle); }
.comment__text { font-size: .92rem; line-height: 1.75; color: var(--color-muted-foreground); white-space: pre-wrap; word-break: break-word; }
.comment__actions { display: flex; gap: var(--space-4); margin-top: 8px; }
.comment__actions button, .comment__actions a {
  background: none; border: 0; padding: 0; cursor: pointer;
  font-size: .82rem; color: var(--color-subtle);
  display: inline-flex; align-items: center; gap: 4px;
}
.comment__actions button:hover, .comment__actions a:hover { color: var(--color-primary); }
.comment__actions svg { width: 14px; height: 14px; }
.comment__replies {
  margin-top: var(--space-4);
  padding-left: var(--space-5);
  border-left: 2px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.comment-form { display: flex; gap: var(--space-4); }
.comment-form__body { flex: 1; display: flex; flex-direction: column; gap: var(--space-3); }

/* ---------------- 分页 ---------------- */
.pagination { display: flex; align-items: center; justify-content: center; gap: 6px; flex-wrap: wrap; margin-top: var(--space-8); }
.page-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 42px;
  height: 42px;
  padding: 0 12px;
  font-size: .9rem;
  font-weight: 600;
  color: var(--color-muted-foreground);
  background: rgba(255,255,255,.78);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: all var(--dur-fast) var(--ease-out);
  cursor: pointer;
}
.page-btn:hover { color: var(--color-primary); border-color: var(--color-primary); background: #fff; transform: translateY(-1px); }
.page-btn.is-active { background: var(--color-primary); border-color: var(--color-primary); color: #fff; box-shadow: var(--shadow-primary); cursor: default; }
.page-btn.is-disabled { opacity: .42; pointer-events: none; }
.page-btn svg { width: 18px; height: 18px; }
.page-btn--nav { padding: 0; }
.page-ellipsis { color: var(--color-subtle); padding: 0 4px; user-select: none; }

/* ---------------- 提示条 / 消息 ---------------- */
.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-md);
  font-size: .9rem;
  line-height: 1.65;
  border: 1px solid;
  margin-bottom: var(--space-5);
}
.alert > svg { width: 19px; height: 19px; flex-shrink: 0; margin-top: 1px; }
.alert strong { display: block; margin-bottom: 2px; }
.alert--success { background: #F0FDF4; border-color: #BBF7D0; color: #15803D; }
.alert--error   { background: #FEF2F2; border-color: #FECACA; color: #B91C1C; }
.alert--warning { background: #FFFBEB; border-color: #FDE68A; color: #B45309; }
.alert--info    { background: #EFF6FF; border-color: #BFDBFE; color: #1D4ED8; }

.toast-stack {
  position: fixed;
  top: calc(var(--header-h) + 16px);
  right: var(--space-5);
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  max-width: min(380px, calc(100vw - 40px));
  pointer-events: none;
}
.toast {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(16px);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-primary);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  font-size: .88rem;
  animation: toast-in var(--dur-slow) var(--ease-spring);
  pointer-events: auto;
}
.toast.is-out { animation: toast-out var(--dur) var(--ease-out) forwards; }
.toast--success { border-left-color: var(--color-success); }
.toast--error   { border-left-color: var(--color-destructive); }
.toast--warning { border-left-color: var(--color-warning); }
.toast svg { width: 18px; height: 18px; flex-shrink: 0; margin-top: 1px; }
.toast--success svg { color: var(--color-success); }
.toast--error svg { color: var(--color-destructive); }
.toast--warning svg { color: var(--color-warning); }
@keyframes toast-in {
  from { opacity: 0; transform: translateX(24px) scale(.96); }
  to   { opacity: 1; transform: translateX(0) scale(1); }
}
@keyframes toast-out {
  to { opacity: 0; transform: translateX(24px) scale(.96); }
}

/* ---------------- 空状态 ---------------- */
.empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--space-16) var(--space-5);
  color: var(--color-muted-foreground);
}
.empty__icon {
  width: 76px; height: 76px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-muted);
  color: var(--color-subtle);
  margin-bottom: var(--space-5);
}
.empty__icon svg { width: 34px; height: 34px; }
.empty h3 { margin-bottom: var(--space-2); }
.empty p { color: var(--color-subtle); font-size: .92rem; margin-bottom: var(--space-5); max-width: 30em; }

/* ---------------- 认证页 ---------------- */
.auth-layout {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
}
.auth-aside {
  position: relative;
  padding: var(--space-16) var(--space-12);
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: linear-gradient(150deg, #1E3A8A 0%, #2563EB 45%, #3B82F6 100%);
  color: #fff;
  overflow: hidden;
}
.auth-aside::before,
.auth-aside::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
}
.auth-aside::before { width: 380px; height: 380px; background: rgba(96,165,250,.6); top: -80px; left: -60px; }
.auth-aside::after  { width: 320px; height: 320px; background: rgba(251,146,60,.42); bottom: -90px; right: -50px; }
.auth-aside__inner { position: relative; z-index: 1; max-width: 26em; }
.auth-aside h2 { color: #fff; margin-bottom: var(--space-4); }
.auth-aside p { color: rgba(255,255,255,.82); line-height: 1.8; }
.auth-aside__list { display: flex; flex-direction: column; gap: var(--space-4); margin-top: var(--space-8); }
.auth-aside__list li { display: flex; align-items: flex-start; gap: var(--space-3); font-size: .92rem; color: rgba(255,255,255,.92); }
.auth-aside__list svg { width: 19px; height: 19px; flex-shrink: 0; margin-top: 2px; color: #93C5FD; }

.auth-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-10) var(--space-6);
  background: var(--color-background);
}
.auth-card { width: 100%; max-width: 424px; }
.auth-card__head { margin-bottom: var(--space-8); }
.auth-card__head h1 { font-size: 1.7rem; margin-bottom: var(--space-2); }
.auth-card__head p { color: var(--color-muted-foreground); font-size: .92rem; margin: 0; }
.auth-card__foot { margin-top: var(--space-6); text-align: center; font-size: .9rem; color: var(--color-muted-foreground); }
.auth-divider {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin: var(--space-6) 0;
  color: var(--color-subtle);
  font-size: .8rem;
}
.auth-divider::before, .auth-divider::after { content: ''; flex: 1; height: 1px; background: var(--color-border); }

.password-field { position: relative; }
.password-field .input { padding-right: 46px; }
.password-toggle {
  position: absolute;
  right: 6px; top: 50%;
  transform: translateY(-50%);
  width: 36px; height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: 0;
  border-radius: var(--radius-xs);
  color: var(--color-subtle);
  cursor: pointer;
}
.password-toggle:hover { color: var(--color-primary); background: var(--color-muted); }
.password-toggle svg { width: 17px; height: 17px; }

/* ---------------- 用户中心 ---------------- */
.account-layout { display: grid; grid-template-columns: 250px minmax(0, 1fr); gap: var(--space-8); align-items: start; }

.account-nav { display: flex; flex-direction: column; gap: 4px; padding: var(--space-5); position: sticky; top: calc(var(--header-h) + 20px); }
.account-nav__user { display: flex; align-items: center; gap: var(--space-3); padding-bottom: var(--space-4); margin-bottom: var(--space-3); border-bottom: 1px solid var(--color-border); }
.account-nav__user strong { display: block; font-size: .95rem; }
.account-nav__user span { font-size: .78rem; color: var(--color-subtle); }
.account-nav__link {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 11px var(--space-4);
  font-size: .9rem;
  font-weight: 500;
  color: var(--color-muted-foreground);
  border-radius: var(--radius-sm);
  transition: all var(--dur-fast) var(--ease-out);
}
.account-nav__link:hover { background: var(--color-muted); color: var(--color-foreground); }
.account-nav__link.is-active { background: var(--color-primary); color: #fff; box-shadow: var(--shadow-primary); }
.account-nav__link svg { width: 17px; height: 17px; }
.account-nav__link .count {
  margin-left: auto;
  font-size: .76rem;
  padding: 1px 8px;
  border-radius: var(--radius-pill);
  background: rgba(148,163,184,.22);
}
.account-nav__link.is-active .count { background: rgba(255,255,255,.24); }

.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: var(--space-4); }
.stat-card { padding: var(--space-5); }
.stat-card__label { font-size: .82rem; color: var(--color-subtle); display: flex; align-items: center; gap: 6px; margin-bottom: var(--space-2); }
.stat-card__label svg { width: 15px; height: 15px; color: var(--color-primary); }
.stat-card__value {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -.02em;
}
.stat-card__hint { font-size: .78rem; color: var(--color-subtle); margin-top: 4px; }

/* ---------------- 页脚 ---------------- */
.site-footer {
  margin-top: var(--space-16);
  padding: var(--space-12) 0 var(--space-6);
  background: rgba(255,255,255,.6);
  backdrop-filter: blur(14px);
  border-top: 1px solid var(--color-border);
}
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: var(--space-8); }
.footer-brand p { font-size: .88rem; color: var(--color-muted-foreground); line-height: 1.75; margin: var(--space-4) 0 0; max-width: 26em; }
.footer-title { font-size: .88rem; font-weight: 700; margin-bottom: var(--space-4); color: var(--color-foreground); font-family: var(--font-display); }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { font-size: .87rem; color: var(--color-muted-foreground); }
.footer-links a:hover { color: var(--color-primary); }
.footer-bottom {
  margin-top: var(--space-10);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
  font-size: .82rem;
  color: var(--color-subtle);
}
.footer-bottom__links { display: flex; gap: var(--space-5); flex-wrap: wrap; }

/* ---------------- 滚动出现动画 ---------------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out);
  will-change: opacity, transform;
}
.reveal.is-visible { opacity: 1; transform: none; }

/* ---------------- 骨架屏 ---------------- */
.skeleton {
  background: linear-gradient(90deg, #EEF2F7 25%, #E2E8F0 37%, #EEF2F7 63%);
  background-size: 400% 100%;
  animation: skeleton 1.4s ease infinite;
  border-radius: var(--radius-sm);
}
@keyframes skeleton {
  from { background-position: 100% 50%; }
  to   { background-position: 0 50%; }
}

/* ---------------- 灯箱 ---------------- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 300;
  background: rgba(15, 23, 42, .88);
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur) var(--ease-out), visibility var(--dur);
}
.lightbox.is-open { opacity: 1; visibility: visible; }
.lightbox img { max-width: 100%; max-height: 88vh; border-radius: var(--radius-md); box-shadow: var(--shadow-lg); }
.lightbox__close {
  position: absolute;
  top: var(--space-6); right: var(--space-6);
  width: 44px; height: 44px;
  border-radius: 50%;
  background: rgba(255,255,255,.14);
  border: 1px solid rgba(255,255,255,.24);
  color: #fff;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.lightbox__close:hover { background: rgba(255,255,255,.24); }
.lightbox__close svg { width: 21px; height: 21px; }

/* ---------------- 表格 ---------------- */
.table-wrap { overflow-x: auto; border-radius: var(--radius-lg); border: 1px solid var(--color-border); background: #fff; }
table.data-table { width: 100%; border-collapse: collapse; font-size: .89rem; min-width: 640px; }
table.data-table th {
  text-align: left;
  padding: 13px var(--space-4);
  font-size: .8rem;
  font-weight: 600;
  color: var(--color-muted-foreground);
  background: #F8FAFC;
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}
table.data-table td {
  padding: 13px var(--space-4);
  border-bottom: 1px solid #F1F5F9;
  vertical-align: middle;
}
table.data-table tbody tr:last-child td { border-bottom: 0; }
table.data-table tbody tr { transition: background-color var(--dur-fast); }
table.data-table tbody tr:hover { background: #F8FAFC; }
table.data-table .cell-actions { display: flex; gap: 6px; justify-content: flex-end; }

/* ---------------- 工具类 ---------------- */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.flex-wrap { flex-wrap: wrap; }
.ml-auto { margin-left: auto; }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mb-0 { margin-bottom: 0; }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.text-sm { font-size: .86rem; }
.text-xs { font-size: .78rem; }
.text-muted { color: var(--color-muted-foreground); }
.text-subtle { color: var(--color-subtle); }
.text-primary { color: var(--color-primary); }
.text-center { text-align: center; }
.text-right { text-align: right; }
.font-bold { font-weight: 700; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.w-full { width: 100%; }
.hidden { display: none !important; }

/* ---------------- 响应式 ---------------- */
@media (max-width: 1080px) {
  .detail-layout { grid-template-columns: 1fr; }
  .detail-side { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 940px) {
  .auth-layout { grid-template-columns: 1fr; }
  .auth-aside { display: none; }
  .account-layout { grid-template-columns: 1fr; }
  .account-nav { position: static; }
  .hero__inner { grid-template-columns: 1fr; gap: var(--space-10); }
  .hero__panel { display: none; }
}

@media (max-width: 860px) {
  .nav__menu, .nav__search { display: none; }
  .nav-toggle { display: inline-flex; margin-left: auto; }
  .nav__actions { margin-left: 0; }
  .nav { gap: var(--space-4); }
  .detail-hero { grid-template-columns: 1fr; }
  .detail-hero__actions { flex-direction: row; flex-wrap: wrap; min-width: 0; }
  .detail-hero { padding: var(--space-6); }
  .filter-bar { padding: var(--space-4); }
}

@media (max-width: 640px) {
  :root { --header-h: 62px; }
  .container { padding-inline: var(--space-4); }
  .hero { padding: var(--space-10) 0 var(--space-8); }
  .hero__stats { gap: var(--space-6); }
  .hero__stat strong { font-size: 1.35rem; }
  .app-grid, .app-grid--wide { grid-template-columns: 1fr; }
  .cat-grid { grid-template-columns: repeat(2, 1fr); }
  .section { padding: var(--space-8) 0; }
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-6); }
  .panel { padding: var(--space-5); }
  .comment-form { flex-direction: column; }
  .pagination { gap: 4px; }
  .page-btn { min-width: 38px; height: 38px; font-size: .85rem; }
  .toast-stack { right: var(--space-4); left: var(--space-4); max-width: none; }
}

@media (max-width: 400px) {
  .cat-grid { grid-template-columns: 1fr; }
  .detail-hero__actions .btn { width: 100%; }
}

/* ---------------- 无障碍：减弱动效 ---------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  .bg-aurora::before, .bg-aurora::after { animation: none; }
  .reveal { opacity: 1; transform: none; }
}

/* ---------------- 打印 ---------------- */
@media print {
  .site-header, .site-footer, .toast-stack, .detail-side, .nav-toggle { display: none !important; }
  body { background: #fff; }
  .glass, .card { box-shadow: none; border: 1px solid #ddd; background: #fff; }
}