/* ============================================
   上愿文化 · 品牌视觉系统
   色彩：藏青 / 朱砂 / 鎏金 / 暖白
   风格：东方美学 × 现代电商
   ============================================ */

:root {
  /* --- 品牌色 --- */
  --c-primary: #1B2A4A;       /* 藏青 */
  --c-primary-light: #2A3F6B;
  --c-primary-dark: #131E33;
  --c-accent: #C8463C;        /* 朱砂红 */
  --c-accent-light: #D4645C;
  --c-accent-dark: #A8362E;
  --c-gold: #D4A84B;          /* 鎏金 */
  --c-gold-light: #E8C97A;
  --c-gold-dark: #B08E34;

  /* --- 中性色 --- */
  --c-bg: #FAF8F5;            /* 暖白底 */
  --c-bg-warm: #F3EDE4;       /* 暖驼 */
  --c-card: #FFFFFF;
  --c-text: #2B2B2B;          /* 墨色正文 */
  --c-text-secondary: #6B6560;/* 灰褐辅助 */
  --c-text-muted: #9A958C;    /* 浅灰提示 */
  --c-border: #E8E4DE;        /* 暖灰分割 */
  --c-border-light: #F0ECE6;

  /* --- 功能色 --- */
  --c-success: #3A7D44;
  --c-warning: #C4841C;
  --c-error: #C0392B;

  /* --- 字体 --- */
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "STSong", "SimSun", serif;
  --font-sans: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", sans-serif;

  /* --- 间距系统 --- */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-xxl: 48px;
  --space-section: 64px;

  /* --- 圆角 --- */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* --- 阴影 --- */
  --shadow-sm: 0 1px 3px rgba(27,42,74,0.06), 0 1px 2px rgba(27,42,74,0.04);
  --shadow-md: 0 4px 12px rgba(27,42,74,0.08), 0 2px 4px rgba(27,42,74,0.04);
  --shadow-lg: 0 8px 30px rgba(27,42,74,0.10), 0 4px 8px rgba(27,42,74,0.05);
  --shadow-card: 0 2px 16px rgba(27,42,74,0.06);

  /* --- 过渡 --- */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 150ms;
  --duration-normal: 300ms;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-sans);
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.7;
  letter-spacing: 0.02em;
  min-height: 100dvh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--c-accent); text-decoration: none; transition: color var(--duration-fast); }
a:hover { color: var(--c-accent-dark); }

/* ============================================
   Layout Shell
   ============================================ */
.wrap {
  max-width: 480px;
  margin: 0 auto;
  min-height: 100dvh;
  background: var(--c-card);
  position: relative;
  box-shadow: 0 0 60px rgba(27,42,74,0.06);
}

.center {
  padding: var(--space-xl) var(--space-lg);
  text-align: center;
}

/* ============================================
   Header / Navigation
   ============================================ */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--c-border-light);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
  padding: 0 var(--space-lg);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--c-primary);
}

.brand-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-light));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-gold);
  font-size: 18px;
  font-weight: 700;
  font-family: var(--font-serif);
}

.brand-name {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.brand-name sub {
  font-size: 10px;
  color: var(--c-text-muted);
  font-weight: 400;
  margin-left: 4px;
  vertical-align: baseline;
}

.nav-links {
  display: flex;
  gap: var(--space-md);
}

.nav-link {
  font-size: 14px;
  color: var(--c-text-secondary);
  padding: 6px 0;
  position: relative;
  transition: color var(--duration-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 16px;
  height: 2px;
  background: var(--c-accent);
  border-radius: 1px;
  transition: transform var(--duration-normal) var(--ease-out);
}

.nav-link:hover, .nav-link.active {
  color: var(--c-primary);
}
.nav-link.active::after, .nav-link:hover::after {
  transform: translateX(-50%) scaleX(1);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
  position: relative;
  padding: var(--space-xxl) var(--space-lg) var(--space-xl);
  background: linear-gradient(
    165deg,
    var(--c-primary-dark) 0%,
    var(--c-primary) 40%,
    var(--c-primary-light) 100%
  );
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -20%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(212,168,75,0.12) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 80px;
  background: linear-gradient(to top, var(--c-card), transparent);
  pointer-events: none;
}

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

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(212,168,75,0.15);
  border: 1px solid rgba(212,168,75,0.25);
  color: var(--c-gold-light);
  font-size: 12px;
  padding: 5px 12px;
  border-radius: 20px;
  margin-bottom: var(--space-lg);
  letter-spacing: 0.06em;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 700;
  color: #fff;
  line-height: 1.35;
  margin-bottom: var(--space-md);
  letter-spacing: 0.04em;
}

.hero-title em {
  font-style: normal;
  color: var(--c-gold-light);
}

.hero-desc {
  font-size: 15px;
  color: rgba(255,255,255,0.72);
  line-height: 1.75;
  max-width: 340px;
  margin-bottom: var(--space-xl);
}

.hero-stats {
  display: flex;
  gap: var(--space-xl);
}

.stat-item {
  text-align: left;
}

.stat-num {
  font-size: 24px;
  font-weight: 700;
  color: var(--c-gold-light);
  font-family: var(--font-serif);
}

.stat-label {
  font-size: 12px;
  color: rgba(255,255,255,0.5);
  margin-top: 2px;
}

/* ============================================
   Section Common
   ============================================ */
.section {
  padding: var(--space-xl) var(--space-lg);
}

.section-header {
  margin-bottom: var(--space-lg);
}

.section-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  color: var(--c-accent);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
}

.section-title {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--c-primary);
  letter-spacing: 0.03em;
  line-height: 1.4;
}

.section-subtitle {
  font-size: 14px;
  color: var(--c-text-secondary);
  margin-top: var(--space-sm);
  line-height: 1.6;
}

.section-divider {
  height: 1px;
  background: linear-gradient(to right, transparent, var(--c-border), transparent);
  margin: var(--space-xs) 0;
}

/* ============================================
   Category Tabs
   ============================================ */
.tabs {
  display: flex;
  gap: var(--space-sm);
  padding: 0 var(--space-lg);
  margin-bottom: var(--space-lg);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.tabs::-webkit-scrollbar { display: none; }

.tab {
  flex-shrink: 0;
  padding: 8px 18px;
  font-size: 13px;
  font-weight: 500;
  color: var(--c-text-secondary);
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: 24px;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out);
  white-space: nowrap;
  user-select: none;
  -webkit-user-select: none;
}

.tab:hover {
  border-color: var(--c-primary-light);
  color: var(--c-primary);
}

.tab.active {
  background: var(--c-primary);
  color: #fff;
  border-color: var(--c-primary);
  box-shadow: 0 2px 8px rgba(27,42,74,0.2);
}

/* ============================================
   Product Cards
   ============================================ */
.product-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
  padding: 0 var(--space-lg);
}

.product-card {
  background: var(--c-card);
  border: 1px solid var(--c-border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out);
  cursor: pointer;
  position: relative;
}

.product-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.product-card:active {
  transform: translateY(-1px);
}

.product-image {
  aspect-ratio: 1;
  background: var(--c-bg-warm);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.product-image-placeholder {
  font-size: 48px;
  opacity: 0.15;
  user-select: none;
  -webkit-user-select: none;
}

.product-tag {
  position: absolute;
  top: 10px;
  left: 10px;
  font-size: 11px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 12px;
  letter-spacing: 0.03em;
}

.tag-new {
  background: var(--c-accent);
  color: #fff;
}

.tag-hot {
  background: linear-gradient(135deg, var(--c-gold-dark), var(--c-gold));
  color: #fff;
}

.tag-limited {
  background: var(--c-primary);
  color: var(--c-gold-light);
}

.product-info {
  padding: 14px 14px 16px;
}

.product-category {
  font-size: 11px;
  color: var(--c-text-muted);
  margin-bottom: 4px;
  letter-spacing: 0.04em;
}

.product-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--c-text);
  line-height: 1.45;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-meta {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
}

.product-price {
  font-size: 18px;
  font-weight: 700;
  color: var(--c-accent);
  font-family: var(--font-serif);
}

.product-price::before {
  content: '¥';
  font-size: 13px;
  font-weight: 500;
  margin-right: 1px;
}

.product-original {
  font-size: 12px;
  color: var(--c-text-muted);
  text-decoration: line-through;
}

.product-sales {
  font-size: 11px;
  color: var(--c-text-muted);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  font-size: 15px;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out);
  user-select: none;
  -webkit-user-select: none;
  letter-spacing: 0.03em;
  line-height: 1;
  text-decoration: none;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: linear-gradient(135deg, var(--c-accent), var(--c-accent-dark));
  color: #fff;
  box-shadow: 0 4px 16px rgba(200,70,60,0.3);
}

.btn-primary:hover {
  box-shadow: 0 6px 24px rgba(200,70,60,0.4);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--c-primary);
  color: #fff;
  box-shadow: 0 4px 16px rgba(27,42,74,0.2);
}

.btn-secondary:hover {
  background: var(--c-primary-light);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--c-primary);
  border: 1.5px solid var(--c-primary);
}

.btn-outline:hover {
  background: var(--c-primary);
  color: #fff;
}

.btn-gold {
  background: linear-gradient(135deg, var(--c-gold-dark), var(--c-gold));
  color: var(--c-primary-dark);
  box-shadow: 0 4px 16px rgba(212,168,75,0.35);
  font-weight: 700;
}

.btn-gold:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(212,168,75,0.45);
}

.btn-block {
  width: 100%;
}

.btn-sm {
  padding: 8px 18px;
  font-size: 13px;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 16px;
}

/* ============================================
   Trust Section
   ============================================ */
.trust-bar {
  background: var(--c-bg);
  padding: var(--space-lg);
  margin: 0 var(--space-lg);
  border-radius: var(--radius-lg);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}

.trust-item {
  text-align: center;
}

.trust-icon {
  font-size: 24px;
  margin-bottom: var(--space-sm);
  opacity: 0.7;
}

.trust-label {
  font-size: 11px;
  color: var(--c-text-secondary);
  font-weight: 500;
}

/* ============================================
   Brand Story (About)
   ============================================ */
.about-hero {
  background: linear-gradient(160deg, var(--c-primary-dark), var(--c-primary));
  padding: var(--space-xxl) var(--space-lg);
  color: #fff;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.about-hero::before {
  content: '';
  position: absolute;
  top: -30%; left: -10%;
  width: 200px; height: 200px;
  background: radial-gradient(circle, rgba(212,168,75,0.1), transparent);
}

.about-hero h1 {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-sm);
  position: relative;
}

.about-hero p {
  font-size: 14px;
  color: rgba(255,255,255,0.65);
  position: relative;
}

.about-content {
  padding: var(--space-xl) var(--space-lg);
}

.about-block {
  margin-bottom: var(--space-xl);
}

.about-block:last-child { margin-bottom: 0; }

.about-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--c-accent);
  margin-bottom: var(--space-md);
  letter-spacing: 0.08em;
}

.about-label::before {
  content: '';
  width: 3px;
  height: 14px;
  background: var(--c-accent);
  border-radius: 2px;
}

.about-text {
  font-size: 14px;
  color: var(--c-text-secondary);
  line-height: 1.85;
}

.about-credentials {
  background: var(--c-bg);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin-top: var(--space-lg);
}

.credential-row {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--c-border-light);
  font-size: 13px;
}

.credential-row:last-child { border-bottom: none; }
.credential-key { color: var(--c-text-muted); }
.credential-val { color: var(--c-text); font-weight: 500; }

/* ============================================
   Product Detail Page
   ============================================ */
.detail-hero {
  position: relative;
}

.detail-image {
  width: 100%;
  aspect-ratio: 1;
  background: var(--c-bg-warm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 72px;
  opacity: 0.12;
  user-select: none;
}

.detail-body {
  padding: var(--space-lg);
  margin-top: -30px;
  position: relative;
  z-index: 1;
  background: var(--c-card);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.detail-category {
  font-size: 12px;
  color: var(--c-accent);
  font-weight: 600;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
}

.detail-title {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--c-primary);
  line-height: 1.4;
  margin-bottom: var(--space-sm);
}

.detail-subtitle {
  font-size: 14px;
  color: var(--c-text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-lg);
}

.detail-price-row {
  display: flex;
  align-items: baseline;
  gap: var(--space-md);
  padding-bottom: var(--space-lg);
  border-bottom: 1px dashed var(--c-border);
  margin-bottom: var(--space-lg);
}

.detail-price {
  font-size: 28px;
  font-weight: 700;
  color: var(--c-accent);
  font-family: var(--font-serif);
}

.detail-price::before { content: '¥'; font-size: 17px; }
.detail-original {
  font-size: 14px;
  color: var(--c-text-muted);
  text-decoration: line-through;
}

.detail-section-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--c-primary);
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  gap: 8px;
}

.detail-features {
  list-style: none;
  margin-bottom: var(--space-lg);
}

.detail-features li {
  position: relative;
  padding-left: 22px;
  font-size: 14px;
  color: var(--c-text-secondary);
  line-height: 1.8;
}

.detail-features li::before {
  content: '✦';
  position: absolute;
  left: 0;
  color: var(--c-gold);
  font-size: 12px;
  top: 2px;
}

.detail-desc {
  font-size: 14px;
  color: var(--c-text-secondary);
  line-height: 1.85;
  margin-bottom: var(--space-lg);
}

.detail-specs {
  background: var(--c-bg);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  margin-bottom: var(--space-xl);
}

.spec-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  font-size: 13px;
  border-bottom: 1px solid var(--c-border-light);
}

.spec-row:last-child { border-bottom: none; }
.spec-key { color: var(--c-text-muted); }
.spec-val { color: var(--c-text); font-weight: 500; }

/* 课程大纲 / 服务流程 扩展区 */
.detail-extra { margin-bottom: var(--space-xl); }

.detail-note {
  font-size: 13px;
  color: var(--c-text-muted);
  margin-top: var(--space-md);
  background: var(--c-bg);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  line-height: 1.7;
  border-left: 3px solid var(--c-gold);
}

.process-steps {
  list-style: none;
  counter-reset: step;
  margin-bottom: var(--space-lg);
  padding-left: 0;
}

.process-steps li {
  position: relative;
  padding-left: 38px;
  font-size: 14px;
  color: var(--c-text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-md);
}

.process-steps li::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 0;
  top: 2px;
  width: 24px;
  height: 24px;
  background: var(--c-primary);
  color: var(--c-gold-light);
  font-size: 12px;
  font-weight: 700;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.detail-actions {
  position: sticky;
  bottom: 0;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: var(--space-md) var(--space-lg);
  border-top: 1px solid var(--c-border-light);
  display: flex;
  gap: var(--space-md);
}

.action-fav {
  width: 48px;
  height: 48px;
  border: 1.5px solid var(--c-border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  background: var(--c-card);
  cursor: pointer;
  transition: all var(--duration-fast);
  flex-shrink: 0;
}

.action-fav:hover { border-color: var(--c-accent); color: var(--c-accent); }

/* ============================================
   Agreement / Terms
   ============================================ */
.agreement-wrap { padding: var(--space-xl) var(--space-lg) 80px; }

.agreement h2 {
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 700;
  color: var(--c-primary);
  margin: var(--space-xl) 0 var(--space-md);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--c-border-light);
}

.agreement h2:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.agreement p, .agreement li {
  font-size: 14px;
  color: var(--c-text-secondary);
  line-height: 1.85;
  margin-bottom: var(--space-sm);
}

.agreement ul { padding-left: 20px; }
.agreement li { margin-bottom: 6px; }

/* ============================================
   Success Page
   ============================================ */
.success-icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--c-success), #4CAF50);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-lg);
  font-size: 40px;
  color: #fff;
  animation: successPop 0.5s var(--ease-spring);
}

@keyframes successPop {
  0% { transform: scale(0); opacity: 0; }
  60% { transform: scale(1.15); }
  100% { transform: scale(1); opacity: 1; }
}

.success-title {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  color: var(--c-primary);
  margin-bottom: var(--space-sm);
}

.success-desc {
  font-size: 14px;
  color: var(--c-text-secondary);
  margin-bottom: var(--space-xl);
  line-height: 1.7;
}

.order-info {
  background: var(--c-bg);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin-bottom: var(--space-xl);
  text-align: left;
}

.order-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  font-size: 14px;
  border-bottom: 1px solid var(--c-border-light);
}

.order-row:last-child { border-bottom: none; }
.order-row .label { color: var(--c-text-muted); }
.order-row .val { font-weight: 500; color: var(--c-text); }

/* ============================================
   Footer
   ============================================ */
.footer {
  background: var(--c-primary-dark);
  color: rgba(255,255,255,0.5);
  padding: var(--space-xl) var(--space-lg) var(--space-lg);
  text-align: center;
  font-size: 12px;
  line-height: 1.8;
}

.footer-brand {
  font-size: 16px;
  font-weight: 600;
  color: rgba(255,255,255,0.85);
  margin-bottom: var(--space-sm);
  letter-spacing: 0.08em;
}

.footer a { color: var(--c-gold-light); }

/* ============================================
   Toast / Loading
   ============================================ */
.toast {
  position: fixed;
  top: 80px;
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  background: var(--c-primary-dark);
  color: #fff;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: 14px;
  z-index: 9999;
  opacity: 0;
  transition: all var(--duration-normal) var(--ease-out);
  pointer-events: none;
  box-shadow: var(--shadow-lg);
  max-width: 360px;
  text-align: center;
}

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

.loading-spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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

.skeleton {
  background: linear-gradient(90deg, var(--c-bg) 25%, var(--c-bg-warm) 50%, var(--c-bg) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

/* ============================================
   Responsive (Desktop enhancement)
   ============================================ */
@media (min-width: 600px) {
  .wrap {
    max-width: 520px;
    border-left: 1px solid var(--c-border-light);
    border-right: 1px solid var(--c-border-light);
  }

  .hero-title { font-size: 32px; }
  .product-grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-lg); }
  .section-title { font-size: 24px; }
}

/* ============================================
   Utility
   ============================================ */
.text-center { text-align: center; }
.text-gold { color: var(--c-gold); }
.text-accent { color: var(--c-accent); }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.hidden { display: none !important; }