/* ===================================================
   蘑菇视频官网 - 主样式表 style.css
   设计风格：深空黑 + 霓虹蓝紫渐变 · 未来科技感
   =================================================== */

/* ---- 变量 ---- */
:root {
  --bg-dark:       #080c14;
  --bg-card:       #0e1525;
  --bg-section:    #0b1020;
  --primary:       #7c3aed;
  --primary-light: #a78bfa;
  --accent:        #06b6d4;
  --accent2:       #f472b6;
  --gradient:      linear-gradient(135deg, #7c3aed 0%, #06b6d4 100%);
  --gradient2:     linear-gradient(135deg, #f472b6 0%, #7c3aed 100%);
  --text-main:     #f1f5f9;
  --text-sub:      #94a3b8;
  --border:        rgba(124, 58, 237, 0.2);
  --border-hover:  rgba(124, 58, 237, 0.5);
  --shadow:        0 8px 32px rgba(124, 58, 237, 0.15);
  --radius:        12px;
  --radius-lg:     20px;
  --transition:    0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---- 重置 & 基础 ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  background: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: var(--primary-light); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; }
input, textarea, select, button { font-family: inherit; }

/* ---- 容器 ---- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.text-center { text-align: center; }
.mt-32 { margin-top: 32px; }

/* ---- 滚动动画 ---- */
.animate-in {
  animation: fadeInUp 0.6s ease forwards;
  opacity: 1 !important;
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(8, 12, 20, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--transition);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 70px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  color: var(--text-main) !important;
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -0.5px;
}
.logo-icon {
  width: 36px;
  height: 36px;
  background: var(--gradient);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  justify-content: center;
}
.main-nav a {
  color: var(--text-sub);
  font-size: 0.9rem;
  padding: 6px 14px;
  border-radius: 6px;
  transition: all var(--transition);
  white-space: nowrap;
}
.main-nav a:hover, .main-nav a.active {
  color: var(--text-main);
  background: rgba(124, 58, 237, 0.12);
}
.nav-cta {
  background: var(--gradient) !important;
  color: #fff !important;
  padding: 7px 18px !important;
  border-radius: 8px !important;
}
.nav-cta:hover { opacity: 0.9; transform: translateY(-1px); }

/* 搜索框 */
.header-search {
  display: flex;
  align-items: center;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  flex-shrink: 0;
}
.header-search input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-main);
  padding: 7px 12px;
  font-size: 0.85rem;
  width: 180px;
}
.header-search input::placeholder { color: var(--text-sub); }
.header-search button {
  background: var(--gradient);
  border: none;
  color: #fff;
  padding: 7px 14px;
  cursor: pointer;
  font-size: 0.8rem;
  white-space: nowrap;
}

/* 汉堡 */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  flex-shrink: 0;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: all var(--transition);
}
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 移动端导航 */
.mobile-nav {
  display: none;
  flex-direction: column;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 16px 24px;
  gap: 4px;
}
.mobile-nav.open { display: flex; }
.mobile-nav a {
  color: var(--text-sub);
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 0.95rem;
  transition: all var(--transition);
}
.mobile-nav a:hover { color: var(--text-main); background: rgba(124,58,237,0.12); }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 80px 0;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 60% at 70% 50%, rgba(124,58,237,0.25) 0%, transparent 70%),
    radial-gradient(ellipse 40% 40% at 20% 80%, rgba(6,182,212,0.15) 0%, transparent 60%),
    radial-gradient(ellipse 50% 50% at 80% 20%, rgba(244,114,182,0.1) 0%, transparent 60%),
    var(--bg-dark);
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, var(--bg-dark) 100%);
}
.hero .container {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 48px;
}
.hero-content { max-width: 680px; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(124,58,237,0.15);
  border: 1px solid rgba(124,58,237,0.3);
  border-radius: 24px;
  padding: 6px 16px;
  font-size: 0.85rem;
  color: var(--primary-light);
  margin-bottom: 24px;
}
.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 900;
  line-height: 1.15;
  color: var(--text-main);
  margin-bottom: 20px;
  letter-spacing: -1px;
}
.hero h1 .highlight {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero p {
  font-size: 1.1rem;
  color: var(--text-sub);
  margin-bottom: 36px;
  max-width: 560px;
  line-height: 1.8;
}
.hero-btns {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.hero-stat-item {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  backdrop-filter: blur(8px);
}
.hero-stat-item .num {
  font-size: 1.8rem;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-stat-item .label {
  font-size: 0.8rem;
  color: var(--text-sub);
  margin-top: 4px;
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--gradient);
  color: #fff;
  padding: 13px 28px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(124,58,237,0.4);
  color: #fff;
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--text-main);
  padding: 12px 28px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid var(--border-hover);
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}
.btn-outline:hover {
  background: rgba(124,58,237,0.1);
  border-color: var(--primary);
  color: var(--text-main);
  transform: translateY(-2px);
}

/* ============================================================
   SECTIONS
   ============================================================ */
.section { padding: 90px 0; }
.section-alt { background: var(--bg-section); }
.section-header {
  text-align: center;
  margin-bottom: 56px;
}
.section-tag {
  display: inline-block;
  background: rgba(124,58,237,0.15);
  border: 1px solid rgba(124,58,237,0.3);
  color: var(--primary-light);
  border-radius: 24px;
  padding: 4px 14px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  margin-bottom: 14px;
}
.section-title {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 14px;
  letter-spacing: -0.5px;
}
.section-title .highlight {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-desc {
  font-size: 1rem;
  color: var(--text-sub);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.8;
}

/* ============================================================
   VIDEO CARDS
   ============================================================ */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}
.video-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  transition: all var(--transition);
}
.video-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}
.video-thumb {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
  background: var(--bg-dark);
}
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.video-card:hover .video-thumb img { transform: scale(1.06); }
.video-play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.4);
  opacity: 0;
  transition: opacity var(--transition);
}
.video-card:hover .video-play-btn { opacity: 1; }
.play-icon {
  width: 56px;
  height: 56px;
  background: rgba(124,58,237,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: scale(0.8);
  transition: transform var(--transition);
}
.video-card:hover .play-icon { transform: scale(1); }
.play-icon svg {
  width: 22px;
  height: 22px;
  fill: #fff;
  margin-left: 3px;
}
.video-meta { padding: 16px; }
.video-meta h3, .video-meta h4 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 10px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-stats {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 0.75rem;
  color: var(--text-sub);
}

/* ============================================================
   PRODUCT CARDS
   ============================================================ */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 28px;
}
.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
}
.product-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}
.product-card-img {
  aspect-ratio: 4/3;
  overflow: hidden;
}
.product-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.product-card:hover .product-card-img img { transform: scale(1.05); }
.product-card-body { padding: 24px; }
.product-card-body h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
}
.product-card-body p {
  font-size: 0.88rem;
  color: var(--text-sub);
  line-height: 1.7;
  margin-bottom: 16px;
}
.product-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.product-tag {
  background: rgba(124,58,237,0.12);
  border: 1px solid rgba(124,58,237,0.25);
  color: var(--primary-light);
  border-radius: 6px;
  padding: 3px 10px;
  font-size: 0.75rem;
}

/* ============================================================
   TECH GRID
   ============================================================ */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.tech-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  gap: 20px;
  transition: all var(--transition);
}
.tech-item:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.tech-num {
  font-size: 2.5rem;
  font-weight: 900;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  flex-shrink: 0;
  line-height: 1;
}
.tech-content h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}
.tech-content p { font-size: 0.88rem; color: var(--text-sub); line-height: 1.7; }

/* ============================================================
   SOLUTION CARDS
   ============================================================ */
.solution-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.solution-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--transition);
}
.solution-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}
.solution-icon { font-size: 2.5rem; margin-bottom: 16px; }
.solution-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
}
.solution-card p { font-size: 0.88rem; color: var(--text-sub); line-height: 1.7; margin-bottom: 16px; }
.solution-benefits { display: flex; flex-direction: column; gap: 6px; }
.solution-benefits li {
  font-size: 0.82rem;
  color: var(--accent);
  padding-left: 16px;
  position: relative;
}
.solution-benefits li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent);
}

/* ============================================================
   PROCESS STEPS
   ============================================================ */
.process-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  position: relative;
}
.process-steps::before {
  content: '';
  position: absolute;
  top: 36px;
  left: 10%;
  right: 10%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0.3;
}
.process-step {
  text-align: center;
  padding: 24px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
  position: relative;
  z-index: 1;
}
.process-step:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.step-circle {
  font-size: 2rem;
  margin-bottom: 12px;
  display: block;
}
.process-step h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}
.process-step p { font-size: 0.8rem; color: var(--text-sub); line-height: 1.6; }

/* ============================================================
   CASES GRID
   ============================================================ */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}
.case-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--transition);
}
.case-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.case-logo { font-size: 2.5rem; margin-bottom: 16px; }
.case-card h2, .case-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
}
.case-card p { font-size: 0.88rem; color: var(--text-sub); line-height: 1.7; margin-bottom: 16px; }
.case-results { display: flex; flex-wrap: wrap; gap: 8px; }
.case-result {
  background: rgba(6,182,212,0.1);
  border: 1px solid rgba(6,182,212,0.25);
  color: var(--accent);
  border-radius: 6px;
  padding: 3px 10px;
  font-size: 0.75rem;
}

/* ============================================================
   NEWS CARDS
   ============================================================ */
.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}
.news-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
}
.news-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.news-card-img {
  aspect-ratio: 16/9;
  overflow: hidden;
}
.news-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.news-card:hover .news-card-img img { transform: scale(1.05); }
.news-card-body { padding: 20px; }
.news-date { font-size: 0.78rem; color: var(--accent); margin-bottom: 8px; }
.news-card-body h2, .news-card-body h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-card-body p { font-size: 0.83rem; color: var(--text-sub); line-height: 1.7; }

/* ============================================================
   REVIEWS
   ============================================================ */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition);
}
.review-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.review-stars { color: #fbbf24; font-size: 1rem; margin-bottom: 12px; letter-spacing: 2px; }
.review-text {
  font-size: 0.88rem;
  color: var(--text-sub);
  line-height: 1.8;
  margin-bottom: 20px;
  font-style: italic;
}
.reviewer { display: flex; align-items: center; gap: 12px; }
.reviewer-avatar {
  width: 40px;
  height: 40px;
  background: var(--gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  color: #fff;
  flex-shrink: 0;
}
.reviewer-name { font-size: 0.9rem; font-weight: 600; color: var(--text-main); }
.reviewer-role { font-size: 0.78rem; color: var(--text-sub); }

/* ============================================================
   FAQ
   ============================================================ */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--transition);
}
.faq-item.open { border-color: var(--border-hover); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
  gap: 16px;
  transition: color var(--transition);
}
.faq-question:hover { color: var(--primary-light); }
.faq-icon {
  width: 24px;
  height: 24px;
  background: rgba(124,58,237,0.15);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--primary-light);
  flex-shrink: 0;
  transition: transform var(--transition);
}
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}
.faq-item.open .faq-answer { max-height: 300px; }
.faq-answer p {
  padding: 0 24px 20px;
  font-size: 0.88rem;
  color: var(--text-sub);
  line-height: 1.8;
}

/* ============================================================
   CONTACT
   ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.contact-info { display: flex; flex-direction: column; gap: 20px; }
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color var(--transition);
}
.contact-item:hover { border-color: var(--border-hover); }
.contact-icon { font-size: 1.5rem; flex-shrink: 0; }
.contact-item-label { font-size: 0.78rem; color: var(--text-sub); margin-bottom: 4px; }
.contact-item-value { font-size: 0.95rem; color: var(--text-main); font-weight: 500; }
.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
}
.contact-form h2, .contact-form h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 24px;
}
.form-group { margin-bottom: 18px; }
.form-group label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-sub);
  margin-bottom: 6px;
}
.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: 8px;
  padding: 10px 14px;
  color: var(--text-main);
  font-size: 0.9rem;
  outline: none;
  transition: border-color var(--transition);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--primary); }
.form-group select option { background: var(--bg-card); color: var(--text-main); }
.form-group textarea { height: 100px; resize: vertical; }

/* ============================================================
   DOWNLOAD PAGE
   ============================================================ */
.download-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 28px;
}
.download-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  text-align: center;
  transition: all var(--transition);
}
.download-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}
.download-card-icon { font-size: 3rem; margin-bottom: 16px; }
.download-card h2 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
}
.download-card p {
  font-size: 0.88rem;
  color: var(--text-sub);
  line-height: 1.7;
  margin-bottom: 20px;
}
.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--gradient);
  color: #fff;
  padding: 12px 28px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--transition);
  cursor: pointer;
}
.download-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(124,58,237,0.4);
  color: #fff;
}

/* ============================================================
   PAGE HERO (内页)
   ============================================================ */
.page-hero {
  background:
    radial-gradient(ellipse 60% 80% at 50% 0%, rgba(124,58,237,0.2) 0%, transparent 70%),
    var(--bg-dark);
  padding: 60px 0 50px;
  border-bottom: 1px solid var(--border);
}
.page-hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 12px;
  letter-spacing: -0.5px;
}
.page-hero p {
  font-size: 1rem;
  color: var(--text-sub);
  max-width: 600px;
  line-height: 1.8;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--text-sub);
  margin-bottom: 16px;
}
.breadcrumb a { color: var(--primary-light); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { color: var(--text-sub); }

/* ============================================================
   CONTENT PROSE
   ============================================================ */
.content-prose h2 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 28px 0 12px;
  padding-left: 14px;
  border-left: 3px solid var(--primary);
}
.content-prose p {
  font-size: 0.92rem;
  color: var(--text-sub);
  line-height: 1.9;
  margin-bottom: 16px;
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: #060a10;
  border-top: 1px solid var(--border);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
}
.footer-brand .logo {
  margin-bottom: 16px;
  color: var(--text-main) !important;
}
.footer-brand p {
  font-size: 0.85rem;
  color: var(--text-sub);
  line-height: 1.8;
  margin-bottom: 8px;
}
.footer-col h4 {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
.footer-col ul { display: flex; flex-direction: column; gap: 8px; }
.footer-col ul li a {
  font-size: 0.83rem;
  color: var(--text-sub);
  transition: color var(--transition);
}
.footer-col ul li a:hover { color: var(--primary-light); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p { font-size: 0.8rem; color: var(--text-sub); }
.footer-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}
.footer-links a { font-size: 0.8rem; color: var(--text-sub); }
.footer-links a:hover { color: var(--primary-light); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .main-nav { display: none; }
  .header-search { display: none; }
  .hamburger { display: flex; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .tech-grid { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: repeat(3, 1fr); }
  .process-steps::before { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .section { padding: 60px 0; }
  .hero { min-height: auto; padding: 60px 0; }
  .hero h1 { font-size: 2rem; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .hero-btns { flex-direction: column; }
  .hero-btns .btn-primary, .hero-btns .btn-outline { width: 100%; justify-content: center; }
  .product-grid, .solution-grid, .cases-grid, .news-grid, .reviews-grid { grid-template-columns: 1fr; }
  .video-grid { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .tech-item { flex-direction: column; }
  .download-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .video-grid { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr; }
  .section-title { font-size: 1.5rem; }
}