/* ============================================
   Components — 组件样式
   ============================================ */

/* ===== 顶部导航 ===== */
.nav {
  position: fixed;
  top: var(--space-4);
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - var(--container-padding) * 2);
  max-width: calc(var(--container-max) - var(--container-padding) * 2);
  z-index: 100;
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-full);
  transition: all var(--duration-base) var(--ease-out);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  font-weight: var(--fw-regular);
  letter-spacing: var(--tracking-tight);
}

.nav-brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-accent), var(--aurora-1));
  display: grid;
  place-items: center;
  font-family: var(--font-serif);
  font-size: 16px;
  font-style: italic;
  color: var(--color-bg);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.nav-link {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  border-radius: var(--radius-full);
  transition: all var(--duration-fast) var(--ease-out);
  position: relative;
}

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

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 4px;
  background: var(--color-accent);
  border-radius: 50%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.nav-icon-btn {
  position: relative;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--glass-bg-l1);
  border: 1px solid var(--glass-border);
  color: var(--color-text);
  transition: all var(--duration-fast) var(--ease-out);
}

.nav-icon-btn:hover {
  background: var(--glass-bg-l3);
  border-color: var(--glass-border-strong);
  transform: scale(1.05);
}

.nav-icon-btn svg {
  width: 18px;
  height: 18px;
}

.nav-badge {
  position: absolute;
  top: -4px;
  right: -4px;
  min-width: 20px;
  height: 20px;
  padding: 0 5px;
  border-radius: var(--radius-full);
  background: var(--color-accent);
  color: var(--color-bg);
  font-size: 11px;
  font-weight: var(--fw-semibold);
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  border: 2px solid var(--color-bg);
  transition: transform var(--duration-base) var(--ease-spring);
}

.nav-badge.bump {
  animation: bump 600ms var(--ease-spring);
}

@media (max-width: 768px) {
  .nav-menu { display: none; }
  .nav { padding: var(--space-3) var(--space-4); }
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: var(--space-32) 0 var(--space-20);
  overflow: hidden;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1080px;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-text);
  margin-bottom: var(--space-8);
}

.hero-eyebrow-dot {
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--color-accent);
  animation: pulse 2s var(--ease-in-out) infinite;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: var(--text-9xl);
  font-weight: var(--fw-regular);
  line-height: 0.92;
  letter-spacing: var(--tracking-tight);
  color: var(--color-text);
  margin-bottom: var(--space-8);
}

.hero-title-line {
  display: block;
  overflow: hidden;
}

.hero-title-line span {
  display: inline-block;
  animation: rise 1.2s var(--ease-out) backwards;
}

.hero-title-line:nth-child(1) span { animation-delay: 0.1s; }
.hero-title-line:nth-child(2) span { animation-delay: 0.25s; }
.hero-title-line:nth-child(3) span { animation-delay: 0.4s; }

.hero-title em {
  font-style: italic;
  color: var(--color-accent);
  position: relative;
}

.hero-subtitle {
  font-size: var(--text-2xl);
  color: var(--color-text-muted);
  max-width: 580px;
  line-height: 1.5;
  margin-bottom: var(--space-10);
  animation: rise 1.2s var(--ease-out) 0.55s backwards;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  animation: rise 1.2s var(--ease-out) 0.7s backwards;
}

/* Hero 浮动玻璃卡片 */
.hero-floating-card {
  position: absolute;
  padding: var(--space-5);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  gap: var(--space-4);
  animation: float 8s var(--ease-in-out) infinite;
  z-index: 1;
}

.hero-floating-card--1 {
  top: 18%;
  right: 8%;
  width: 240px;
  animation-delay: 0s;
}

.hero-floating-card--2 {
  bottom: 22%;
  right: 16%;
  width: 200px;
  animation-delay: 2s;
}

.hero-floating-card-thumb {
  width: 56px;
  height: 80px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  background: linear-gradient(135deg, #6B5BFF, #FF6BA8);
  box-shadow: 0 8px 24px rgba(107, 91, 255, 0.4);
}

.hero-floating-card-thumb--alt {
  background: linear-gradient(135deg, #D9B27A, #FFB36B);
  box-shadow: 0 8px 24px rgba(217, 178, 122, 0.4);
}

.hero-floating-card-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.hero-floating-card-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
}

.hero-floating-card-title {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  line-height: 1.1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

@media (max-width: 1100px) {
  .hero-floating-card--1, .hero-floating-card--2 { display: none; }
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 14px 28px;
  font-size: var(--text-base);
  font-weight: var(--fw-medium);
  border-radius: var(--radius-full);
  transition: all var(--duration-base) var(--ease-out);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-text);
  color: var(--color-bg);
  border: 1px solid var(--color-text);
}

.btn--primary:hover {
  background: var(--color-accent);
  color: var(--color-bg);
  border-color: var(--color-accent);
  transform: translateY(-1px);
  box-shadow: 0 12px 32px rgba(217, 178, 122, 0.3);
}

.btn--primary:active {
  transform: translateY(0) scale(0.98);
}

.btn--ghost {
  background: var(--glass-bg-l2);
  -webkit-backdrop-filter: var(--glass-blur-l2);
  backdrop-filter: var(--glass-blur-l2);
  color: var(--color-text);
  border: 1px solid var(--glass-border);
}

.btn--ghost:hover {
  background: var(--glass-bg-l3);
  border-color: var(--glass-border-strong);
  transform: translateY(-1px);
}

.btn--sm {
  padding: 10px 18px;
  font-size: var(--text-sm);
}

.btn--full {
  width: 100%;
}

.btn svg {
  width: 16px;
  height: 16px;
  transition: transform var(--duration-base) var(--ease-out);
}

.btn:hover svg.arrow {
  transform: translateX(4px);
}

/* ===== 分类 Tab ===== */
.categories {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-10);
  width: fit-content;
  max-width: 100%;
  overflow-x: auto;
  scrollbar-width: none;
}

.categories::-webkit-scrollbar { display: none; }

.category-tab {
  padding: 10px 20px;
  font-size: var(--text-sm);
  font-weight: var(--fw-medium);
  color: var(--color-text-muted);
  border-radius: var(--radius-full);
  transition: all var(--duration-base) var(--ease-out);
  white-space: nowrap;
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.category-tab:hover {
  color: var(--color-text);
}

.category-tab.active {
  color: var(--color-bg);
  background: var(--color-text);
  box-shadow: 0 4px 12px rgba(255, 255, 255, 0.15);
}

.category-tab-count {
  font-family: var(--font-mono);
  font-size: 10px;
  padding: 2px 6px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.1);
  color: inherit;
  opacity: 0.6;
}

.category-tab.active .category-tab-count {
  background: rgba(0, 0, 0, 0.1);
  opacity: 0.7;
}

/* ===== 书目卡片 ===== */
.book-card {
  position: relative;
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  cursor: pointer;
  transition: all var(--duration-base) var(--ease-out);
  text-align: left;
  width: 100%;
  isolation: isolate;
}

.book-card:hover {
  transform: translateY(-8px);
  border-color: var(--glass-border-strong);
  background: var(--glass-bg-l3);
  box-shadow: var(--glass-shadow-lg);
}

.book-cover {
  position: relative;
  aspect-ratio: 3/4;
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  padding: var(--space-4);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
  transition: transform var(--duration-base) var(--ease-out);
}

.book-card:hover .book-cover {
  transform: scale(1.02);
}

.book-cover-grain {
  position: absolute;
  inset: 0;
  opacity: 0.15;
  background-image: url("data:image/svg+xml;utf8,<svg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  pointer-events: none;
}

.book-cover-title {
  position: relative;
  z-index: 1;
  font-family: var(--font-serif);
  font-size: 1.5rem;
  line-height: 1;
  color: white;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
  max-width: 90%;
}

.book-cover-author {
  position: absolute;
  top: var(--space-4);
  left: var(--space-4);
  z-index: 1;
  font-size: 10px;
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.85);
}

.book-cover-badge {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  z-index: 1;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.95);
  color: var(--color-bg);
  font-size: 10px;
  font-weight: var(--fw-semibold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
}

.book-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.book-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  line-height: 1.15;
  color: var(--color-text);
  font-weight: var(--fw-regular);
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.book-author {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.book-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--space-2);
  padding-top: var(--space-3);
  border-top: 1px solid var(--glass-border);
}

.book-rating {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
}

.book-rating-star {
  color: var(--color-accent);
}

.book-price {
  font-family: var(--font-mono);
  font-size: var(--text-base);
  color: var(--color-text);
  font-weight: var(--fw-medium);
}

/* ===== 编辑推荐区 ===== */
.editorial-card {
  position: relative;
  border-radius: var(--radius-2xl);
  padding: var(--space-10);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 480px;
  overflow: hidden;
  isolation: isolate;
}

.editorial-card--feature {
  background: linear-gradient(135deg, rgba(107, 91, 255, 0.15), rgba(255, 107, 168, 0.08));
}

.editorial-card--quote {
  background: var(--glass-bg-l2);
  -webkit-backdrop-filter: var(--glass-blur-l2);
  backdrop-filter: var(--glass-blur-l2);
}

.editorial-quote {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  line-height: 1.2;
  color: var(--color-text);
  font-style: italic;
  position: relative;
  z-index: 1;
}

.editorial-quote::before {
  content: '"';
  position: absolute;
  top: -40px;
  left: -20px;
  font-size: 8rem;
  color: var(--color-accent);
  opacity: 0.3;
  font-family: var(--font-serif);
  line-height: 1;
}

.editorial-attribute {
  margin-top: var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.editorial-attribute-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--aurora-3), var(--aurora-1));
}

.editorial-attribute-text {
  display: flex;
  flex-direction: column;
}

.editorial-attribute-name {
  font-size: var(--text-sm);
  color: var(--color-text);
}

.editorial-attribute-role {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.editorial-eyebrow {
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}

.editorial-feature-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 1;
  color: var(--color-text);
  max-width: 80%;
  letter-spacing: var(--tracking-tight);
}

.editorial-feature-title em {
  font-style: italic;
  color: var(--color-accent);
}

.editorial-feature-meta {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  margin-top: var(--space-6);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.editorial-feature-meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.editorial-card-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: 0.6;
  background-image: radial-gradient(circle at 20% 20%, rgba(107, 91, 255, 0.4) 0%, transparent 50%),
                    radial-gradient(circle at 80% 80%, rgba(255, 107, 168, 0.3) 0%, transparent 50%);
}

/* ===== 订阅 CTA ===== */
.subscribe {
  position: relative;
  border-radius: var(--radius-2xl);
  padding: clamp(var(--space-12), 6vw, var(--space-20));
  text-align: center;
  overflow: hidden;
  isolation: isolate;
}

.subscribe-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 30% 30%, rgba(107, 91, 255, 0.25) 0%, transparent 50%),
    radial-gradient(circle at 70% 70%, rgba(217, 178, 122, 0.2) 0%, transparent 50%);
}

.subscribe-eyebrow {
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}

.subscribe-title {
  font-family: var(--font-serif);
  font-size: var(--text-7xl);
  font-weight: var(--fw-regular);
  line-height: 1;
  letter-spacing: var(--tracking-tight);
  color: var(--color-text);
  max-width: 720px;
  margin: 0 auto var(--space-4);
}

.subscribe-title em {
  font-style: italic;
  color: var(--color-accent);
}

.subscribe-subtitle {
  font-size: var(--text-xl);
  color: var(--color-text-muted);
  max-width: 520px;
  margin: 0 auto var(--space-10);
}

.subscribe-form {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  max-width: 480px;
  margin: 0 auto;
  padding: var(--space-2);
  border-radius: var(--radius-full);
  background: var(--glass-bg-l1);
  -webkit-backdrop-filter: var(--glass-blur-l2);
  backdrop-filter: var(--glass-blur-l2);
  border: 1px solid var(--glass-border);
}

.subscribe-input {
  flex: 1;
  padding: 12px 20px;
  font-size: var(--text-base);
  color: var(--color-text);
  min-width: 0;
}

.subscribe-input::placeholder {
  color: var(--color-text-subtle);
}

.subscribe-note {
  font-size: var(--text-xs);
  color: var(--color-text-subtle);
  margin-top: var(--space-4);
}

.subscribe-success {
  display: none;
  padding: var(--space-4) var(--space-6);
  border-radius: var(--radius-md);
  background: var(--color-accent-soft);
  color: var(--color-accent);
  font-size: var(--text-base);
  max-width: 480px;
  margin: 0 auto;
  animation: rise 0.6s var(--ease-out);
}

.subscribe-success.show {
  display: block;
}

/* ===== 页脚 ===== */
.footer {
  border-top: 1px solid var(--glass-border);
  padding: var(--space-16) 0 var(--space-8);
  margin-top: var(--space-20);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--space-10);
  margin-bottom: var(--space-16);
}

@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-8); }
}

@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
}

.footer-brand {
  max-width: 360px;
}

.footer-brand-name {
  font-family: var(--font-serif);
  font-size: 2rem;
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.footer-brand-name em {
  font-style: italic;
  color: var(--color-accent);
}

.footer-brand-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.6;
}

.footer-col-title {
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--color-text);
  margin-bottom: var(--space-5);
  font-weight: var(--fw-medium);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-link {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  transition: color var(--duration-fast) var(--ease-out);
  display: inline-block;
}

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-8);
  border-top: 1px solid var(--glass-border);
  font-size: var(--text-xs);
  color: var(--color-text-subtle);
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-bottom-links {
  display: flex;
  gap: var(--space-6);
}

/* ===== Modal 详情 ===== */
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(10, 10, 11, 0.7);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  display: grid;
  place-items: center;
  padding: var(--space-6);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-base) var(--ease-out);
}

.modal-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

.modal {
  position: relative;
  border-radius: var(--radius-2xl);
  padding: 0;
  max-width: 920px;
  width: 100%;
  max-height: 90vh;
  overflow: hidden;
  display: grid;
  grid-template-columns: 320px 1fr;
  transform: scale(0.92) translateY(20px);
  transition: transform var(--duration-base) var(--ease-out);
}

.modal-backdrop.open .modal {
  transform: scale(1) translateY(0);
}

@media (max-width: 768px) {
  .modal { grid-template-columns: 1fr; max-height: 95vh; overflow-y: auto; }
}

.modal-cover {
  position: relative;
  aspect-ratio: 3/4;
  background: linear-gradient(135deg, #1A1A2E, #16213E);
  overflow: hidden;
}

@media (max-width: 768px) {
  .modal-cover { aspect-ratio: 16/9; }
}

.modal-cover-grain {
  position: absolute;
  inset: 0;
  opacity: 0.15;
  background-image: url("data:image/svg+xml;utf8,<svg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
}

.modal-cover-content {
  position: absolute;
  inset: 0;
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  color: white;
}

.modal-cover-title {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  line-height: 0.95;
  letter-spacing: var(--tracking-tight);
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.5);
}

.modal-cover-author {
  font-size: var(--text-sm);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  opacity: 0.85;
}

.modal-body {
  padding: var(--space-10);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  overflow-y: auto;
}

@media (max-width: 768px) {
  .modal-body { padding: var(--space-6); }
}

.modal-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--color-accent);
}

.modal-title {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  line-height: 1;
  letter-spacing: var(--tracking-tight);
  color: var(--color-text);
}

.modal-author {
  font-size: var(--text-base);
  color: var(--color-text-muted);
}

.modal-summary {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
}

.modal-specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  padding: var(--space-5);
  border-radius: var(--radius-md);
  background: var(--glass-bg-l1);
  border: 1px solid var(--glass-border);
}

.modal-spec {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.modal-spec-label {
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-text-subtle);
}

.modal-spec-value {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text);
}

.modal-actions {
  display: flex;
  gap: var(--space-3);
  margin-top: auto;
  padding-top: var(--space-2);
}

@media (max-width: 480px) {
  .modal-actions { flex-direction: column-reverse; }
  .modal-actions .btn { width: 100%; }
}

.modal-close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  z-index: 10;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--glass-bg-l3);
  -webkit-backdrop-filter: var(--glass-blur-l2);
  backdrop-filter: var(--glass-blur-l2);
  border: 1px solid var(--glass-border);
  color: var(--color-text);
  transition: all var(--duration-fast) var(--ease-out);
}

.modal-close:hover {
  background: var(--glass-bg-l3);
  transform: scale(1.1) rotate(90deg);
}

.modal-close svg {
  width: 16px;
  height: 16px;
}

/* ===== 购物车抽屉 ===== */
.drawer-backdrop {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(10, 10, 11, 0.5);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-base) var(--ease-out);
}

.drawer-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

.drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  max-width: 440px;
  z-index: 1001;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform var(--duration-base) var(--ease-out);
  border-radius: 0;
  border-left: 1px solid var(--glass-border);
  border-right: none;
  border-top: none;
  border-bottom: none;
}

.drawer-backdrop.open .drawer {
  transform: translateX(0);
}

.drawer-header {
  padding: var(--space-6) var(--space-6) var(--space-5);
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--glass-border);
}

.drawer-title {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  letter-spacing: var(--tracking-tight);
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
}

.drawer-title-count {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-weight: var(--fw-regular);
}

.drawer-close {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--glass-bg-l1);
  border: 1px solid var(--glass-border);
  color: var(--color-text);
  transition: all var(--duration-fast) var(--ease-out);
}

.drawer-close:hover {
  background: var(--glass-bg-l3);
  transform: scale(1.1) rotate(90deg);
}

.drawer-close svg {
  width: 16px;
  height: 16px;
}

.drawer-body {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-5) var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.drawer-empty {
  text-align: center;
  padding: var(--space-12) var(--space-4);
  color: var(--color-text-muted);
}

.drawer-empty-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-4);
  border-radius: 50%;
  background: var(--glass-bg-l1);
  border: 1px solid var(--glass-border);
  display: grid;
  place-items: center;
  color: var(--color-text-subtle);
}

.drawer-empty-text {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.drawer-empty-sub {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.drawer-item {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  background: var(--glass-bg-l1);
  border: 1px solid var(--glass-border);
  transition: all var(--duration-base) var(--ease-out);
  animation: rise 0.4s var(--ease-out);
}

.drawer-item:hover {
  background: var(--glass-bg-l2);
  border-color: var(--glass-border-strong);
}

.drawer-item-cover {
  width: 60px;
  height: 80px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  background: linear-gradient(135deg, #6B5BFF, #FF6BA8);
  position: relative;
  overflow: hidden;
}

.drawer-item-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-width: 0;
}

.drawer-item-title {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  line-height: 1.1;
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

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

.drawer-item-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--space-2);
}

.drawer-qty {
  display: flex;
  align-items: center;
  gap: 2px;
  background: var(--glass-bg-l1);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  padding: 2px;
}

.drawer-qty-btn {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: var(--color-text);
  transition: background var(--duration-fast) var(--ease-out);
}

.drawer-qty-btn:hover {
  background: var(--glass-bg-l3);
}

.drawer-qty-btn svg {
  width: 12px;
  height: 12px;
}

.drawer-qty-value {
  min-width: 28px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text);
}

.drawer-item-price {
  font-family: var(--font-mono);
  font-size: var(--text-base);
  color: var(--color-text);
  font-weight: var(--fw-medium);
}

.drawer-item-remove {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: var(--color-text-subtle);
  transition: all var(--duration-fast) var(--ease-out);
  opacity: 0;
}

.drawer-item:hover .drawer-item-remove {
  opacity: 1;
}

.drawer-item-remove:hover {
  color: var(--color-accent);
}

.drawer-item {
  position: relative;
}

.drawer-item-remove svg {
  width: 12px;
  height: 12px;
}

.drawer-footer {
  padding: var(--space-5) var(--space-6) var(--space-6);
  border-top: 1px solid var(--glass-border);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.drawer-summary {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.drawer-summary-row {
  display: flex;
  justify-content: space-between;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.drawer-summary-row--total {
  padding-top: var(--space-3);
  border-top: 1px solid var(--glass-border);
  margin-top: var(--space-2);
  font-size: var(--text-2xl);
  color: var(--color-text);
  font-family: var(--font-serif);
  font-weight: var(--fw-regular);
}

.drawer-summary-row--total .drawer-summary-value {
  font-family: var(--font-mono);
  font-size: 1.5rem;
}

.drawer-summary-value {
  font-family: var(--font-mono);
  color: var(--color-text);
}

/* ===== Toast 提示 ===== */
.toast {
  position: fixed;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  z-index: 2000;
  padding: var(--space-4) var(--space-6);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text);
  box-shadow: var(--glass-shadow-lg);
  opacity: 0;
  transition: all var(--duration-base) var(--ease-out);
  pointer-events: none;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.toast-icon {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-accent);
  color: var(--color-bg);
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.toast-icon svg {
  width: 12px;
  height: 12px;
}

/* ===== 实用工具类 ===== */
.hidden { display: none !important; }
.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;
}