/* ========================
   若风RFPicToolbox - Global Styles
   ======================== */

:root {
  --primary: #7c3aed;
  --primary-dark: #6d28d9;
  --primary-light: #ede9fe;
  --secondary: #4f46e5;
  --bg: #f8fafc;
  --card: #ffffff;
  --text: #1f2937;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --radius: 1rem;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.02);
  --header-height: 4rem;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img {
  max-width: 100%;
  height: auto;
}

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

a:hover {
  text-decoration: underline;
}

/* ========================
   Layout
   ======================== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

main {
  flex: 1;
}

/* ========================
   Header
   ======================== */
.site-header {
  background: rgba(255, 255, 255, 0.95);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
}

.site-header .container {
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text);
}

.logo-icon {
  width: 2rem;
  height: 2rem;
  border-radius: 0.5rem;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.main-nav a {
  color: var(--text-muted);
  font-size: 0.9375rem;
  font-weight: 500;
  transition: color 0.2s;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--primary);
  text-decoration: none;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

/* ========================
   Buttons
   ======================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: 0.75rem;
  font-size: 0.9375rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: white;
  box-shadow: 0 4px 14px rgba(124, 58, 237, 0.25);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(124, 58, 237, 0.35);
  text-decoration: none;
}

.btn-outline {
  background: white;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-outline:hover {
  background: var(--primary-light);
  text-decoration: none;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

/* ========================
   Cards
   ======================== */
.card {
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.card-body {
  padding: 1.5rem;
}

/* ========================
   Forms
   ======================== */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.form-control,
.form-select {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  font-size: 0.9375rem;
  background: white;
  color: var(--text);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus,
.form-select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.1);
}

.form-check {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--primary);
}

input[type="color"] {
  width: 100%;
  height: 2.75rem;
  padding: 0.25rem;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  cursor: pointer;
}

/* ========================
   Hero
   ======================== */
.hero {
  text-align: center;
  padding: 1rem 0 1rem;
}

.hero h1 {
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 0.75rem;
  color: var(--text);
}

.hero p {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 auto 0.75rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 500;
}

/* ========================
   Feature Cards
   ======================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.feature-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.875rem;
  text-align: center;
  transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  width: 2.25rem;
  height: 2.25rem;
  margin: 0 auto 0.5rem;
  border-radius: 0.625rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: white;
}

.feature-card h3 {
  font-size: 1rem;
  font-weight: 600;
}

/* ========================
   Home Layout
   ======================== */
.home-main {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 2rem;
  align-items: start;
}

.home-right {
  position: sticky;
  top: calc(var(--header-height) + 1.5rem);
}

.home-right-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.home-left .card-body {
  padding: 1rem;
}

.home-left .upload-zone {
  padding: 1rem 1.25rem;
  margin-bottom: 0.5rem;
  min-height: 240px;
}

.home-left .upload-zone-icon {
  width: 2.5rem;
  height: 2.5rem;
}

.home-left .features-grid {
  margin-top: 1rem;
}

.home-left .feature-card {
  padding: 0.625rem;
}

.home-left .feature-icon {
  width: 2rem;
  height: 2rem;
}

/* ========================
   Content Pages
   ======================== */
.page-header {
  padding: 2.5rem 0 1.5rem;
  text-align: center;
}

.page-header h1 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.page-header p {
  color: var(--text-muted);
}

.content-section {
  padding: 1.5rem 0 3rem;
}

.article-content {
  max-width: 800px;
  margin: 0 auto;
  background: white;
  padding: 2rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.article-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 2rem 0 1rem;
  color: var(--text);
}

.article-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 1.5rem 0 0.75rem;
}

.article-content p {
  margin-bottom: 1rem;
  color: #374151;
}

.article-content ul,
.article-content ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

.article-content li {
  margin-bottom: 0.5rem;
}

.article-meta {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-bottom: 1.5rem;
}

/* Article list */
.article-list {
  display: grid;
  gap: 0.75rem;
}

.article-item {
  display: block;
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  transition: box-shadow 0.2s, transform 0.2s;
}

.article-item:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
  text-decoration: none;
}

.article-item h2 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.article-item p {
  color: var(--text-muted);
  font-size: 0.9375rem;
  margin-bottom: 0.75rem;
}

.article-item .tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 500;
}

/* ========================
   Breadcrumb
   ======================== */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.breadcrumb a {
  color: var(--text-muted);
}

.breadcrumb a:hover {
  color: var(--primary);
}

/* ========================
   Pagination
   ======================== */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}

.pagination-btn {
  min-width: 2.5rem;
  height: 2.5rem;
  padding: 0 0.75rem;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  background: white;
  color: var(--text);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.pagination-btn:hover:not(:disabled):not(.active) {
  border-color: var(--primary);
  color: var(--primary);
}

.pagination-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

.pagination-btn:disabled,
.pagination-btn.disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.pagination-ellipsis {
  color: var(--text-muted);
  padding: 0 0.5rem;
}

/* ========================
   Ad Container
   ======================== */
#ad-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.5rem 1rem;
}

.ad-placeholder {
  width: 100%;
  min-height: 90px;
  background: #f1f5f9;
  border: 2px dashed #cbd5e1;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #94a3b8;
  font-size: 0.875rem;
}

/* ========================
   Footer
   ======================== */
.site-footer {
  background: white;
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  margin-top: auto;
}

.site-footer .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.25rem;
  font-size: 0.875rem;
}

.footer-links a {
  color: var(--text-muted);
}

.footer-links a:hover {
  color: var(--primary);
}

.copyright {
  font-size: 0.875rem;
  color: var(--text-muted);
  text-align: center;
}

/* ========================
   Utility (Tailwind-like)
   ======================== */

/* Display */
.block { display: block; }
.inline-block { display: inline-block; }
.inline-flex { display: inline-flex; }
.flex { display: flex; }
.grid { display: grid; }
.hidden { display: none !important; }

/* Flex */
.flex-1 { flex: 1 1 0%; }
.flex-col { flex-direction: column; }
.flex-row { flex-direction: row; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }
.flex-wrap { flex-wrap: wrap; }

/* Grid */
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-5 { grid-template-columns: repeat(5, 1fr); }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }

/* Gap */
.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.gap-6 { gap: 1.5rem; }
.gap-8 { gap: 2rem; }

/* Sizing */
.w-full { width: 100%; }
.h-full { height: 100%; }
.h-auto { height: auto; }
.h-8 { height: 2rem; }
.h-10 { height: 2.5rem; }
.h-16 { height: 4rem; }
.h-24 { height: 6rem; }
.h-32 { height: 8rem; }
.w-8 { width: 2rem; }
.w-10 { width: 2.5rem; }
.w-16 { width: 4rem; }
.max-w-full { max-width: 100%; }
.max-w-6xl { max-width: 72rem; }
.min-w-full { min-width: 100%; }

/* Margin */
.m-0 { margin: 0; }
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mt-6 { margin-top: 1.5rem; }
.mt-8 { margin-top: 2rem; }
.mt-10 { margin-top: 2.5rem; }
.mt-12 { margin-top: 3rem; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 2rem; }
.mr-2 { margin-right: 0.5rem; }
.mr-4 { margin-right: 1rem; }
.ml-auto { margin-left: auto; }
.mx-auto { margin-left: auto; margin-right: auto; }

/* Padding */
.p-0 { padding: 0; }
.p-2 { padding: 0.5rem; }
.p-3 { padding: 0.75rem; }
.p-4 { padding: 1rem; }
.p-5 { padding: 1.25rem; }
.p-6 { padding: 1.5rem; }
.p-8 { padding: 2rem; }
.p-12 { padding: 3rem; }
.px-2 { padding-left: 0.5rem; padding-right: 0.5rem; }
.px-3 { padding-left: 0.75rem; padding-right: 0.75rem; }
.px-4 { padding-left: 1rem; padding-right: 1rem; }
.px-6 { padding-left: 1.5rem; padding-right: 1.5rem; }
.py-1 { padding-top: 0.25rem; padding-bottom: 0.25rem; }
.py-1_5 { padding-top: 0.375rem; padding-bottom: 0.375rem; }
.py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
.py-3 { padding-top: 0.75rem; padding-bottom: 0.75rem; }
.py-4 { padding-top: 1rem; padding-bottom: 1rem; }
.py-6 { padding-top: 1.5rem; padding-bottom: 1.5rem; }
.py-8 { padding-top: 2rem; padding-bottom: 2rem; }

/* Typography */
.text-xs { font-size: 0.75rem; }
.text-sm { font-size: 0.875rem; }
.text-base { font-size: 1rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }
.text-2xl { font-size: 1.5rem; }
.text-3xl { font-size: 1.875rem; }
.text-4xl { font-size: 2.25rem; }
.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.font-extrabold { font-weight: 800; }
.tracking-tight { letter-spacing: -0.025em; }
.whitespace-nowrap { white-space: nowrap; }

/* Text colors */
.text-white { color: #ffffff; }
.text-slate-400 { color: #94a3b8; }
.text-slate-500 { color: #64748b; }
.text-slate-600 { color: #475569; }
.text-slate-700 { color: #334155; }
.text-slate-800 { color: #1e293b; }
.text-slate-900 { color: #0f172a; }
.text-violet-600 { color: #7c3aed; }
.text-violet-700 { color: #6d28d9; }
.text-violet-800 { color: #5b21b6; }
.text-green-600 { color: #16a34a; }
.text-blue-600 { color: #2563eb; }
.text-orange-600 { color: #ea580c; }
.text-pink-600 { color: #db2777; }
.text-purple-600 { color: #9333ea; }

/* Background colors */
.bg-white { background-color: #ffffff; }
.bg-slate-50 { background-color: #f8fafc; }
.bg-slate-100 { background-color: #f1f5f9; }
.bg-slate-200 { background-color: #e2e8f0; }
.bg-violet-50 { background-color: #f5f3ff; }
.bg-violet-100 { background-color: #ede9fe; }
.bg-violet-600 { background-color: #7c3aed; }
.bg-violet-700 { background-color: #6d28d9; }
.bg-blue-100 { background-color: #dbeafe; }
.bg-green-100 { background-color: #dcfce7; }
.bg-orange-100 { background-color: #ffedd5; }
.bg-pink-100 { background-color: #fce7f3; }
.bg-purple-100 { background-color: #f3e8ff; }

/* Border */
.border { border-width: 1px; border-style: solid; border-color: var(--border); }
.border-2 { border-width: 2px; border-style: solid; border-color: var(--border); }
.border-b { border-bottom-width: 1px; border-bottom-style: solid; border-bottom-color: var(--border); }
.border-slate-200 { border-color: #e2e8f0; }
.border-slate-300 { border-color: #cbd5e1; }
.border-dashed { border-style: dashed; }
.border-violet-200 { border-color: #ddd6fe; }
.border-violet-500 { border-color: #8b5cf6; }
.border-violet-600 { border-color: #7c3aed; }

/* Border radius */
.rounded { border-radius: 0.25rem; }
.rounded-lg { border-radius: 0.5rem; }
.rounded-xl { border-radius: 0.75rem; }
.rounded-2xl { border-radius: 1rem; }
.rounded-full { border-radius: 9999px; }

/* Shadow */
.shadow { box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1); }
.shadow-sm { box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05); }

/* Overflow */
.overflow-hidden { overflow: hidden; }

/* Position */
.relative { position: relative; }
.absolute { position: absolute; }
.sticky { position: sticky; }
.top-0 { top: 0; }
.z-50 { z-index: 50; }

/* Cursor */
.cursor-pointer { cursor: pointer; }

/* Missing utilities */
.text-center { text-align: center; }
.crop-ratio-btn { }

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Responsive utilities */
@media (min-width: 640px) {
  .sm-flex-row { flex-direction: row; }
  .sm\\:block { display: block; }
  .sm\\:h-32 { height: 8rem; }
  .sm\\:px-6 { padding-left: 1.5rem; padding-right: 1.5rem; }
  .sm\\:p-12 { padding: 3rem; }
}

@media (min-width: 768px) {
  .md\\:grid-cols-5 { grid-template-columns: repeat(5, 1fr); }
  .md\\:col-span-1 { grid-column: span 1 / span 1; }
}

@media (min-width: 1024px) {
  .lg\\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
}

/* ========================
   Responsive
   ======================== */
@media (max-width: 1024px) {
  .home-main {
    grid-template-columns: 1fr;
  }

  .home-right {
    position: static;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 3.5rem;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: 1rem;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    gap: 0.75rem;
  }

  .main-nav.open {
    display: flex;
  }

  .mobile-menu-btn {
    display: block;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .article-content {
    padding: 1.25rem;
  }

  .grid-2 {
    grid-template-columns: 1fr;
  }
}

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