/* =============================================
   雯兮软件工作室 · 官网样式
   ============================================= */

/* ---------- CSS 变量 ---------- */
:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --secondary: #8b5cf6;
  --accent: #06b6d4;
  --success: #10b981;

  --bg: #0a0a0f;
  --bg-2: #111118;
  --bg-3: #1a1a24;
  --bg-card: rgba(255, 255, 255, 0.04);
  --bg-card-hover: rgba(255, 255, 255, 0.08);

  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(99, 102, 241, 0.4);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.15);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);

  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);

  --font: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'PingFang SC', sans-serif;
}

/* ---------- 基础重置 ---------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

ul { list-style: none; }

img, svg { display: block; max-width: 100%; }

button { cursor: pointer; border: none; outline: none; background: none; font-family: var(--font); }

input, textarea, select {
  font-family: var(--font);
  font-size: 1rem;
  outline: none;
}

/* ---------- 通用布局 ---------- */
.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary-light);
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.25);
  padding: 5px 14px;
  border-radius: 100px;
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 580px;
  margin: 0 auto;
  line-height: 1.8;
}

/* ---------- 动画进入 ---------- */
.card-animate {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.card-animate.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 渐变文字 ---------- */
.gradient-text {
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* =============================================
   导航栏
   ============================================= */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transition: background var(--transition), border-color var(--transition), backdrop-filter var(--transition);
  border-bottom: 1px solid transparent;
}

.navbar.scrolled {
  background: rgba(10, 10, 15, 0.85);
  border-bottom-color: var(--border);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.nav-container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.01em;
}

.logo-icon {
  font-size: 1.3rem;
  color: var(--primary-light);
  line-height: 1;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-links a {
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}

.nav-links a:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.06);
}

.nav-cta {
  background: var(--primary) !important;
  color: #fff !important;
  padding: 7px 18px !important;
  border-radius: var(--radius-sm) !important;
  font-weight: 500;
  transition: background var(--transition), transform var(--transition) !important;
}

.nav-cta:hover {
  background: var(--primary-dark) !important;
  transform: translateY(-1px);
}

/* 汉堡菜单 */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}

.hamburger:hover { background: rgba(255,255,255,0.06); }

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
  display: none;
  flex-direction: column;
  padding: 12px 24px 20px;
  background: rgba(10, 10, 15, 0.95);
  backdrop-filter: blur(20px);
  border-top: 1px solid var(--border);
}

.mobile-menu.open { display: flex; }

.mobile-menu a {
  padding: 12px 0;
  font-size: 1rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  transition: color var(--transition);
}

.mobile-menu a:last-child { border-bottom: none; }
.mobile-menu a:hover { color: var(--text-primary); }

/* =============================================
   Hero 区域
   ============================================= */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  padding: 120px 24px 80px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  animation: orb-float 8s ease-in-out infinite;
}

.orb1 {
  width: 500px;
  height: 500px;
  top: -100px;
  left: -150px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.25) 0%, transparent 70%);
  animation-delay: 0s;
}

.orb2 {
  width: 400px;
  height: 400px;
  top: 100px;
  right: -100px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.2) 0%, transparent 70%);
  animation-delay: -3s;
}

.orb3 {
  width: 350px;
  height: 350px;
  bottom: 0;
  left: 30%;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.15) 0%, transparent 70%);
  animation-delay: -5s;
}

@keyframes orb-float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(20px, -30px) scale(1.05); }
  66% { transform: translate(-15px, 20px) scale(0.95); }
}

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 40%, transparent 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 780px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  padding: 6px 14px;
  border-radius: 100px;
  margin-bottom: 28px;
  animation: fade-in-up 0.8s ease both;
}

.badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--success);
  animation: pulse-dot 2s ease infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.3); }
}

.hero-title {
  font-size: clamp(2.4rem, 7vw, 4.4rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.12;
  margin-bottom: 20px;
  animation: fade-in-up 0.8s 0.15s ease both;
}

.hero-subtitle {
  font-size: clamp(0.95rem, 2vw, 1.1rem);
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 40px;
  animation: fade-in-up 0.8s 0.3s ease both;
}

.hero-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 60px;
  animation: fade-in-up 0.8s 0.45s ease both;
}

/* 按钮 */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  background: var(--primary);
  color: #fff;
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.35);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(99, 102, 241, 0.5);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  padding: 13px 28px;
  background: rgba(255,255,255,0.06);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}

.btn-secondary:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.15);
  transform: translateY(-2px);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  padding: 12px 28px;
  background: transparent;
  color: var(--primary-light);
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: 1px solid rgba(99, 102, 241, 0.4);
  transition: background var(--transition), color var(--transition), transform var(--transition);
}

.btn-outline:hover {
  background: rgba(99, 102, 241, 0.1);
  transform: translateY(-2px);
}

/* 数字统计 */
.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  animation: fade-in-up 0.8s 0.6s ease both;
}

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

.stat-number {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.03em;
}

.stat-suffix {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--primary-light);
}

.stat-label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}

/* 滚动提示 */
.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
  animation: fade-in-up 1s 0.9s ease both;
}

.scroll-indicator {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.scroll-arrow {
  width: 24px;
  height: 24px;
  border-right: 2px solid var(--text-muted);
  border-bottom: 2px solid var(--text-muted);
  transform: rotate(45deg);
  animation: scroll-bounce 2s ease infinite;
}

@keyframes scroll-bounce {
  0%, 100% { transform: rotate(45deg) translate(0, 0); opacity: 0.6; }
  50% { transform: rotate(45deg) translate(3px, 3px); opacity: 1; }
}

@keyframes fade-in-up {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* =============================================
   关于我们
   ============================================= */
.about {
  background: var(--bg-2);
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.about-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}

.about-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-4px);
}

.about-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.about-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.about-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* =============================================
   服务
   ============================================= */
.services {
  background: var(--bg);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: background var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--icon-color, var(--primary)), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}

.service-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(255,255,255,0.12);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.service-card:hover::before { opacity: 1; }

.service-icon-wrap {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-sm);
  background: rgba(from var(--icon-color, #6366f1) r g b / 0.12);
  background: color-mix(in srgb, var(--icon-color, #6366f1) 12%, transparent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--icon-color, var(--primary));
}

.service-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.service-card > p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 18px;
}

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.service-tags li {
  font-size: 0.76rem;
  color: var(--text-muted);
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  padding: 3px 10px;
  border-radius: 100px;
}

/* =============================================
   作品
   ============================================= */
.works {
  background: var(--bg-2);
}

.works-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.work-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.work-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-6px);
  box-shadow: var(--shadow-card);
}

.work-cover {
  height: 180px;
  background: var(--cover-grad);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.work-cover::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.1);
}

.work-cover-icon {
  font-size: 3rem;
  position: relative;
  z-index: 1;
}

.work-info {
  padding: 24px;
}

.work-tags {
  display: flex;
  gap: 8px;
  margin-bottom: 10px;
}

.work-tags span {
  font-size: 0.75rem;
  color: var(--primary-light);
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.2);
  padding: 2px 10px;
  border-radius: 100px;
}

.work-info h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.work-info p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.works-more {
  text-align: center;
}

/* =============================================
   团队
   ============================================= */
.team {
  background: var(--bg);
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.team-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}

.team-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-4px);
}

.team-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--avatar-grad);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 1.8rem;
  font-weight: 700;
  color: #fff;
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}

.team-name {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--text-primary);
}

.team-role {
  font-size: 0.82rem;
  color: var(--primary-light);
  margin-bottom: 14px;
}

.team-bio {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 18px;
}

.team-skills {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  justify-content: center;
}

.team-skills span {
  font-size: 0.75rem;
  color: var(--text-muted);
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  padding: 3px 10px;
  border-radius: 100px;
}

/* =============================================
   联系
   ============================================= */
.contact {
  background: var(--bg-2);
}

.contact-wrap {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 40px;
  align-items: start;
}

.contact-info {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 28px;
}

.contact-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-light);
  flex-shrink: 0;
}

.contact-label {
  display: block;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 3px;
}

.contact-value {
  display: block;
  font-size: 0.95rem;
  color: var(--text-primary);
  font-weight: 500;
}

.contact-note {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  margin-top: 28px;
}

.contact-note p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* 表单 */
.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
  font-weight: 500;
}

.form-group label span {
  color: #ef4444;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  padding: 12px 14px;
  font-size: 0.92rem;
  transition: border-color var(--transition), background var(--transition);
}

.form-group select {
  appearance: none;
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}

.form-group select option {
  background: #1a1a24;
  color: var(--text-primary);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  background: rgba(99, 102, 241, 0.04);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.btn-submit {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px;
  background: var(--primary);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.3);
  margin-bottom: 12px;
}

.btn-submit:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(99, 102, 241, 0.45);
}

.btn-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.form-tip {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: center;
}

/* =============================================
   页脚
   ============================================= */
.footer {
  background: var(--bg-3);
  border-top: 1px solid var(--border);
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 56px 0 40px;
  gap: 48px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.footer-tagline {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 64px;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col h4 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.footer-col a {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: color var(--transition);
}

.footer-col a:hover { color: var(--text-secondary); }

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.footer-bottom p {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.footer-icp {
  font-size: 0.78rem !important;
  color: var(--text-muted);
}

/* =============================================
   回到顶部
   ============================================= */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--transition), visibility var(--transition), transform var(--transition), background var(--transition);
  backdrop-filter: blur(12px);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

/* =============================================
   Toast 提示
   ============================================= */
.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--bg-3);
  border: 1px solid var(--border);
  color: var(--text-primary);
  font-size: 0.9rem;
  padding: 12px 22px;
  border-radius: var(--radius-md);
  z-index: 200;
  opacity: 0;
  transition: opacity 0.3s ease, transform 0.3s ease;
  pointer-events: none;
  backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}

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

.toast.success { border-color: rgba(16, 185, 129, 0.4); }
.toast.error   { border-color: rgba(239, 68, 68, 0.4); }

/* =============================================
   响应式
   ============================================= */
@media (max-width: 1024px) {
  .about-grid     { grid-template-columns: repeat(2, 1fr); }
  .services-grid  { grid-template-columns: repeat(2, 1fr); }
  .contact-wrap   { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .section { padding: 72px 0; }

  .nav-links { display: none; }
  .hamburger { display: flex; }

  .hero-stats { gap: 24px; }
  .stat-number { font-size: 1.7rem; }

  .works-grid    { grid-template-columns: 1fr; }
  .team-grid     { grid-template-columns: 1fr; }
  .services-grid { grid-template-columns: 1fr; }
  .about-grid    { grid-template-columns: 1fr 1fr; }

  .footer-top   { flex-direction: column; gap: 32px; }
  .footer-links { flex-wrap: wrap; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }

  .contact-form { padding: 24px; }
  .contact-info { padding: 24px; }
  .form-row     { grid-template-columns: 1fr; }

  .back-to-top  { bottom: 20px; right: 20px; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 2rem; }
  .about-grid { grid-template-columns: 1fr; }
  .hero-stats { flex-direction: column; gap: 16px; }
  .stat-divider { width: 80px; height: 1px; }
}

/* =============================================
   产品首页 · 产品列表
   ============================================= */
.hero-products .hero-title {
  font-size: clamp(2.2rem, 6vw, 4rem);
}

.product-list {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.product-card:hover {
  border-color: rgba(from var(--color, #6366f1) r g b / 0.35);
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.3);
}

.product-card-inner {
  display: grid;
  grid-template-columns: 200px 1fr;
  align-items: center;
  gap: 0;
}

.product-icon-wrap {
  height: 100%;
  min-height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--app-color), var(--app-color-2));
  position: relative;
  overflow: hidden;
}

.product-icon-wrap::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.1);
}

.product-icon-emoji {
  font-size: 3.5rem;
  position: relative;
  z-index: 1;
  filter: drop-shadow(0 4px 12px rgba(0,0,0,0.2));
}

.product-info {
  padding: 32px 36px;
}

.product-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
}

.product-name {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.product-version {
  font-size: 0.78rem;
  color: var(--text-muted);
  background: rgba(255,255,255,0.06);
  padding: 2px 8px;
  border-radius: 100px;
  border: 1px solid var(--border);
}

.product-platform {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: 100px;
  letter-spacing: 0.05em;
}

.platform-ios {
  background: rgba(0, 122, 255, 0.15);
  color: #60a5fa;
  border: 1px solid rgba(0, 122, 255, 0.25);
}

.platform-android {
  background: rgba(61, 220, 132, 0.15);
  color: #4ade80;
  border: 1px solid rgba(61, 220, 132, 0.25);
}

.product-tagline {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
  font-weight: 500;
}

.product-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 16px;
  max-width: 600px;
}

.product-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-bottom: 24px;
}

.product-tags span {
  font-size: 0.76rem;
  color: var(--text-muted);
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  padding: 3px 10px;
  border-radius: 100px;
}

.product-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn-product-detail {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  background: var(--primary);
  color: #fff;
  font-size: 0.88rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: background var(--transition), transform var(--transition);
  box-shadow: 0 3px 14px rgba(99,102,241,0.3);
}

.btn-product-detail:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
}

.btn-product-download {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  background: rgba(255,255,255,0.06);
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  transition: background var(--transition), color var(--transition), transform var(--transition);
}

.btn-product-download:hover {
  background: rgba(255,255,255,0.1);
  color: var(--text-primary);
  transform: translateY(-1px);
}

/* 关于迷你版 */
.about-mini-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-mini-stats {
  display: flex;
  gap: 32px;
  margin-top: 8px;
}

.mini-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.mini-stat-num {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary-light);
  letter-spacing: -0.03em;
}

.mini-stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.about-mini-cards {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.value-card {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  transition: border-color var(--transition), background var(--transition);
}

.value-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
}

.value-card span { font-size: 1.4rem; flex-shrink: 0; }

.value-card h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 3px;
}

.value-card p {
  font-size: 0.84rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* 联系迷你版 */
.contact-mini-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 48px 56px;
  flex-wrap: wrap;
}

.contact-mini-actions {
  flex-shrink: 0;
}

/* =============================================
   产品详情页
   ============================================= */

/* App Hero */
.app-hero {
  position: relative;
  padding: 140px 0 80px;
  overflow: hidden;
}

.app-hero-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 20% 50%, color-mix(in srgb, var(--app-color) 20%, transparent) 0%, transparent 70%),
              radial-gradient(ellipse 60% 60% at 80% 50%, color-mix(in srgb, var(--app-color-2) 10%, transparent) 0%, transparent 70%);
  z-index: 0;
}

.app-hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 40%, transparent 100%);
}

.app-hero-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 48px;
}

.app-icon-large {
  width: 120px;
  height: 120px;
  border-radius: 26px;
  background: linear-gradient(135deg, var(--app-color), var(--app-color-2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3.5rem;
  flex-shrink: 0;
  box-shadow: 0 20px 60px rgba(0,0,0,0.4), 0 0 0 1px rgba(255,255,255,0.1);
}

.app-hero-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.app-category {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.app-hero-title {
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.app-hero-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
  line-height: 1.6;
}

.app-hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.app-hero-version {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* 功能卡片 */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--feat-color, var(--primary));
  opacity: 0;
  transition: opacity var(--transition);
}

.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(255,255,255,0.12);
  transform: translateY(-4px);
}

.feature-card:hover::before { opacity: 1; }

.feature-icon {
  font-size: 1.8rem;
  margin-bottom: 14px;
}

.feature-card h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* 截图占位 */
.screenshots-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 16px;
}

.screenshot-placeholder {
  aspect-ratio: 9/18;
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, var(--sc-color) 0%, color-mix(in srgb, var(--sc-color) 60%, #000) 100%);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 20px;
  opacity: 0.7;
  border: 1px solid rgba(255,255,255,0.06);
}

.screenshot-placeholder span {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.7);
  background: rgba(0,0,0,0.3);
  padding: 4px 12px;
  border-radius: 100px;
}

.screenshots-tip {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: center;
}

/* 更新日志 */
.changelog-list {
  max-width: 680px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.changelog-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
}

.changelog-version {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.version-badge {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--v-color, var(--primary));
  background: color-mix(in srgb, var(--v-color, var(--primary)) 12%, transparent);
  padding: 3px 12px;
  border-radius: 100px;
  border: 1px solid color-mix(in srgb, var(--v-color, var(--primary)) 30%, transparent);
}

.version-date {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.version-tag {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 100px;
  letter-spacing: 0.05em;
}

.version-tag.new {
  background: rgba(16, 185, 129, 0.12);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.changelog-notes {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.changelog-notes li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  padding-left: 4px;
}

/* 下载区域 */
.app-download {
  background: var(--bg);
}

.download-inner {
  text-align: center;
  max-width: 560px;
  margin: 0 auto;
  padding: 60px 40px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  position: relative;
  overflow: hidden;
}

.download-inner::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--dl-color, var(--primary)), transparent);
}

.download-icon {
  font-size: 3rem;
  margin-bottom: 16px;
}

.download-inner h2 {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.download-inner > p {
  color: var(--text-secondary);
  margin-bottom: 28px;
}

.download-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-bottom: 20px;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 24px;
  background: #000;
  color: #fff;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255,255,255,0.1);
  transition: opacity var(--transition), transform var(--transition);
}

.download-btn:hover {
  opacity: 0.85;
  transform: translateY(-2px);
}

.download-ios { background: #1c1c1e; }

.dl-label {
  display: block;
  font-size: 0.7rem;
  color: rgba(255,255,255,0.7);
  line-height: 1;
  margin-bottom: 2px;
}

.dl-store {
  display: block;
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1;
}

.download-note {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 16px !important;
}

.direct-download-wrap { margin-top: 4px; }

.btn-direct-download {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 24px;
  background: transparent;
  color: var(--dl-color, var(--primary));
  font-size: 0.88rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: 1px solid color-mix(in srgb, var(--dl-color, var(--primary)) 40%, transparent);
  transition: background var(--transition), transform var(--transition);
}

.btn-direct-download:hover {
  background: color-mix(in srgb, var(--dl-color, var(--primary)) 10%, transparent);
  transform: translateY(-1px);
}

/* 使用场景 */
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.scenario-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 22px;
  text-align: center;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}

.scenario-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(139,92,246,0.3);
  transform: translateY(-4px);
}

.scenario-emoji {
  display: block;
  font-size: 2rem;
  margin-bottom: 12px;
}

.scenario-card h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.scenario-card p {
  font-size: 0.84rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* 时辰网格（古时光） */
.shichen-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 14px;
}

.shichen-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 18px 14px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 5px;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
  cursor: default;
}

.shichen-card:hover {
  background: rgba(245,158,11,0.06);
  border-color: rgba(245,158,11,0.3);
  transform: translateY(-3px);
}

.shichen-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fbbf24;
  letter-spacing: 0.05em;
}

.shichen-time {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

.shichen-desc {
  font-size: 0.78rem;
  color: var(--text-secondary);
}

/* =============================================
   响应式补充
   ============================================= */
@media (max-width: 1024px) {
  .shichen-grid    { grid-template-columns: repeat(4, 1fr); }
  .scenarios-grid  { grid-template-columns: repeat(2, 1fr); }
  .features-grid   { grid-template-columns: repeat(2, 1fr); }
  .screenshots-row { grid-template-columns: repeat(2, 1fr); }
  .about-mini-inner { grid-template-columns: 1fr; gap: 36px; }
  .contact-mini-inner { padding: 36px; }
}

@media (max-width: 768px) {
  .product-card-inner {
    grid-template-columns: 1fr;
  }
  .product-icon-wrap {
    min-height: 160px;
  }
  .product-info {
    padding: 24px;
  }
  .product-name { font-size: 1.4rem; }
  .app-hero-inner { flex-direction: column; text-align: center; }
  .app-icon-large { width: 90px; height: 90px; font-size: 2.8rem; }
  .app-hero-actions { justify-content: center; }
  .app-hero { padding: 110px 0 60px; }
  .features-grid { grid-template-columns: 1fr; }
  .shichen-grid { grid-template-columns: repeat(3, 1fr); }
  .scenarios-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-mini-inner { flex-direction: column; text-align: center; padding: 28px; }
  .about-mini-stats { justify-content: center; }
  .download-inner { padding: 40px 24px; }
}

@media (max-width: 480px) {
  .shichen-grid    { grid-template-columns: repeat(2, 1fr); }
  .scenarios-grid  { grid-template-columns: 1fr; }
  .screenshots-row { grid-template-columns: repeat(2, 1fr); }
  .download-buttons { flex-direction: column; align-items: center; }
  .product-actions { flex-wrap: wrap; }
}

/* 加载中动画 */
.products-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 80px 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.loading-spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.coming-soon-badge {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  font-size: 0.82rem;
  color: #fbbf24;
  background: rgba(245,158,11,0.1);
  border: 1px solid rgba(245,158,11,0.25);
  border-radius: var(--radius-sm);
  font-weight: 500;
}