/* ========================================================================
   点智 DianZhi 官网样式
   设计系统沿用 app：深色 #0E0E12 + 紫色 accent #8B5CF6 + 圆角 + 玻璃光晕
   ======================================================================== */

/* ----- 基础变量 ----- */
:root {
  --bg: #0E0E12;
  --bg-2: #14141A;
  --bg-card: rgba(255, 255, 255, 0.02);
  --border: #2A2A33;
  --border-strong: #3A3A45;
  --text: #E5E5EE;
  --text-muted: #B8B8C5;
  --text-soft: #7E7E8C;
  --accent: #8B5CF6;
  --accent-hover: #A78BFA;
  --accent-soft: rgba(139, 92, 246, 0.10);
  --accent-glow: rgba(139, 92, 246, 0.35);
  --success: #10B981;
  --warning: #F59E0B;
  --danger: #EF4444;
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 18px;
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.35);
  --shadow-glow: 0 0 80px rgba(139, 92, 246, 0.25);
  --maxw: 1200px;
}

/* ----- reset ----- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
               "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; }

/* ----- 容器 + 排版 ----- */
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
h1, h2, h3, h4 { font-weight: 700; letter-spacing: -0.5px; line-height: 1.25; }
h1 { font-size: clamp(36px, 5vw, 56px); }
h2 { font-size: clamp(28px, 3.4vw, 40px); }
h3 { font-size: 19px; }
.eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--accent-hover);
  background: var(--accent-soft);
  padding: 6px 14px;
  border-radius: 99px;
  border: 1px solid rgba(139, 92, 246, 0.25);
}
.section-title { text-align: center; margin-bottom: 14px; }
.section-sub {
  text-align: center;
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto 56px;
  font-size: 16px;
}

/* ====================  导航栏  ==================== */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  backdrop-filter: blur(14px);
  background: rgba(14, 14, 18, 0.72);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s, background 0.2s;
}
.nav.scrolled { border-bottom-color: var(--border); }
.nav-inner {
  max-width: var(--maxw); margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  height: 64px; padding: 0 24px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; }
.brand-icon {
  width: 32px; height: 32px;
  border-radius: 9px;
  background: linear-gradient(135deg, #8B5CF6 0%, #6366F1 100%);
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 14px rgba(139, 92, 246, 0.4);
}
.brand-icon svg { width: 18px; height: 18px; color: white; }
.brand-name { letter-spacing: 0.3px; }
.brand-name small { color: var(--text-soft); font-weight: 500; font-size: 12px; margin-left: 6px; }
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a {
  color: var(--text-muted); font-size: 14px; font-weight: 500;
  transition: color 0.15s;
}
.nav-links a:hover { color: var(--text); }
.nav-cta {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px;
  background: var(--accent);
  color: white !important;
  border-radius: var(--radius-sm);
  font-weight: 600 !important; font-size: 13px !important;
  transition: background 0.15s, transform 0.15s;
}
.nav-cta:hover { background: var(--accent-hover); transform: translateY(-1px); }
.nav-toggle { display: none; background: none; border: 0; color: var(--text); font-size: 22px; }

/* ====================  Hero  ==================== */
.hero {
  position: relative;
  padding: 140px 0 80px;
  overflow: hidden;
  text-align: center;
}
.hero::before, .hero::after {
  content: ''; position: absolute; pointer-events: none;
  border-radius: 50%; filter: blur(80px);
}
.hero::before {
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.30) 0%, transparent 60%);
  top: -200px; left: 50%; transform: translateX(-50%);
}
.hero::after {
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.20) 0%, transparent 60%);
  bottom: -100px; right: -100px;
}
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(139, 92, 246, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(139, 92, 246, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center top, black 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center top, black 0%, transparent 70%);
}
.hero-content { position: relative; z-index: 2; }
.hero h1 {
  margin: 22px auto 24px; max-width: 900px;
  background: linear-gradient(180deg, #FFFFFF 0%, #B8B8C5 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero h1 .gradient {
  background: linear-gradient(90deg, #A78BFA 0%, #818CF8 50%, #A78BFA 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-sub {
  font-size: clamp(16px, 1.5vw, 19px);
  color: var(--text-muted);
  max-width: 720px; margin: 0 auto 40px;
  line-height: 1.7;
}
.hero-cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-bottom: 18px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 26px;
  border-radius: var(--radius-sm);
  border: 0;
  font-size: 15px; font-weight: 600;
  transition: all 0.18s ease;
  cursor: pointer;
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent); color: white;
  box-shadow: 0 4px 16px rgba(139, 92, 246, 0.35);
}
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 6px 22px rgba(139, 92, 246, 0.5); }
.btn-secondary {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-strong);
  color: var(--text);
}
.btn-secondary:hover { border-color: var(--accent); background: var(--accent-soft); }
.btn svg { width: 18px; height: 18px; }
.hero-meta {
  display: flex; justify-content: center; gap: 24px; flex-wrap: wrap;
  margin-top: 28px; color: var(--text-soft); font-size: 13px;
}
.hero-meta span { display: inline-flex; align-items: center; gap: 6px; }
.hero-meta svg { width: 16px; height: 16px; color: var(--success); }

/* Hero 截图（带 glow） */
.hero-screenshot {
  position: relative;
  max-width: 1080px; margin: 70px auto 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow:
    0 30px 80px rgba(0, 0, 0, 0.6),
    0 0 120px rgba(139, 92, 246, 0.22);
}
.hero-screenshot img { width: 100%; display: block; }
.hero-screenshot::before {
  content: ''; position: absolute; inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, transparent 70%, rgba(14, 14, 18, 0.4) 100%);
}

/* Hero CSS Mock（占位真实截图） */
.hero-mock {
  max-width: 1080px; margin: 70px auto 0;
  position: relative;
}
.hero-mock::before {
  content: ''; position: absolute; inset: -20px;
  border-radius: 32px;
  background: radial-gradient(ellipse at center, rgba(139, 92, 246, 0.18) 0%, transparent 60%);
  filter: blur(40px); z-index: -1;
}
.mock-window {
  background: linear-gradient(180deg, #14141A 0%, #0E0E12 100%);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  display: grid;
  grid-template-columns: 64px 1fr;
  min-height: 460px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.6), 0 0 120px rgba(139, 92, 246, 0.18);
}
.mock-sidebar {
  background: #0A0A0E;
  border-right: 1px solid var(--border);
  padding: 18px 0;
  display: flex; flex-direction: column; align-items: center; gap: 14px;
}
.mock-logo {
  width: 32px; height: 32px; border-radius: 9px;
  background: linear-gradient(135deg, #8B5CF6 0%, #6366F1 100%);
  box-shadow: 0 4px 14px rgba(139, 92, 246, 0.4);
}
.mock-icon {
  width: 30px; height: 30px; border-radius: 7px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
}
.mock-icon.active {
  background: rgba(139, 92, 246, 0.15);
  border-color: var(--accent);
}
.mock-main { padding: 22px 28px; display: flex; flex-direction: column; gap: 20px; }
.mock-topbar { display: flex; justify-content: space-between; align-items: center; gap: 14px; }
.mock-search {
  flex: 1; max-width: 340px; height: 34px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
}
.mock-cta {
  width: 110px; height: 34px; border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), #6366F1);
  box-shadow: 0 4px 14px rgba(139, 92, 246, 0.35);
}
.mock-grid {
  display: grid; grid-template-columns: 1.6fr 1fr; gap: 14px;
}
.mock-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
  display: flex; flex-direction: column; gap: 14px;
  min-height: 220px;
}
.mock-card.lg { min-height: 220px; }
.mock-card-head { display: flex; justify-content: space-between; align-items: center; }
.mock-pill {
  font-size: 11px; padding: 4px 10px;
  background: var(--accent-soft);
  border: 1px solid rgba(139, 92, 246, 0.25);
  color: var(--accent-hover);
  border-radius: 99px; font-weight: 600;
}
.mock-score {
  font-size: 26px; font-weight: 800;
  color: var(--success);
  font-family: ui-monospace, Menlo, monospace;
}
.mock-score small { font-size: 13px; color: var(--text-soft); font-weight: 500; }
.mock-steps {
  display: flex; flex-direction: column; gap: 8px; margin-top: auto;
}
.mock-step {
  font-size: 12px; padding: 7px 11px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border);
  border-radius: 7px;
  color: var(--text-soft);
}
.mock-step.done { color: var(--success); border-color: rgba(16, 185, 129, 0.3); background: rgba(16, 185, 129, 0.06); }
.mock-step.active {
  color: var(--accent-hover); border-color: var(--accent); background: var(--accent-soft);
  animation: pulse-mock 1.6s ease-in-out infinite;
}
@keyframes pulse-mock {
  0%, 100% { box-shadow: 0 0 0 0 rgba(139, 92, 246, 0.4); }
  50% { box-shadow: 0 0 0 6px rgba(139, 92, 246, 0); }
}
.mock-radar {
  flex: 1; display: flex; align-items: center; justify-content: center;
}
.mock-radar svg { width: 100%; max-width: 160px; height: auto; }
.mock-label {
  text-align: center; font-size: 12px; color: var(--text-soft);
  letter-spacing: 1px;
}
.mock-platforms {
  display: flex; flex-wrap: wrap; gap: 8px;
}
.mp-chip {
  font-size: 12px; padding: 6px 12px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: 99px;
  color: var(--text-muted);
}

/* ===========  Highlights 功能特写 =========== */
.highlights {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px;
}
.hl {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  transition: all 0.22s ease;
}
.hl:hover {
  border-color: rgba(139, 92, 246, 0.45);
  transform: translateY(-3px);
  box-shadow: 0 10px 40px rgba(139, 92, 246, 0.12);
}
.hl-art {
  height: 130px;
  background: linear-gradient(180deg, rgba(139, 92, 246, 0.05), transparent);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(139, 92, 246, 0.12);
  margin-bottom: 18px;
  display: flex; align-items: center; justify-content: center;
  gap: 8px;
  position: relative;
  overflow: hidden;
}
.hl h4 { font-size: 16px; margin-bottom: 6px; }
.hl p { color: var(--text-muted); font-size: 13px; line-height: 1.7; }

/* art-pipeline 流水线节点图 */
.hl-art-pipeline { gap: 0; }
.hl-art-pipeline .dot {
  width: 14px; height: 14px; border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  border: 2px solid var(--border-strong);
  flex-shrink: 0;
}
.hl-art-pipeline .dot.done { background: var(--success); border-color: var(--success); box-shadow: 0 0 12px rgba(16, 185, 129, 0.5); }
.hl-art-pipeline .dot.active { background: var(--accent); border-color: var(--accent); box-shadow: 0 0 16px rgba(139, 92, 246, 0.7); animation: pulse-mock 1.4s infinite; }
.hl-art-pipeline .line {
  width: 28px; height: 2px;
  background: var(--border-strong);
}
.hl-art-pipeline .line.done { background: var(--success); }

/* art-radar 雷达图 */
.hl-art-radar svg { width: 100px; height: 100px; }

/* art-platforms 5 平台 emoji */
.hl-art-platforms { flex-wrap: wrap; padding: 0 20px; }
.hl-art-platforms .p {
  width: 46px; height: 46px;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 22px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 11px;
}

/* art-kb 知识库 RAG */
.hl-art-kb { gap: 12px; }
.hl-art-kb .kb-doc {
  width: 22px; height: 28px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-strong);
  border-radius: 3px;
  position: relative;
}
.hl-art-kb .kb-doc::before {
  content: ''; position: absolute; top: 5px; left: 4px; right: 4px;
  height: 2px; background: rgba(167, 139, 250, 0.5); border-radius: 1px;
  box-shadow: 0 5px 0 rgba(167, 139, 250, 0.3), 0 10px 0 rgba(167, 139, 250, 0.2);
}
.hl-art-kb .kb-arrow {
  color: var(--accent); font-size: 22px; font-weight: 700;
}
.hl-art-kb .kb-vector {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 4px;
  width: 60px;
}
.hl-art-kb .kb-vector span {
  width: 100%; aspect-ratio: 1;
  background: var(--accent);
  border-radius: 2px;
  opacity: 0.7;
}
.hl-art-kb .kb-vector span:nth-child(1) { opacity: 1; }
.hl-art-kb .kb-vector span:nth-child(3) { opacity: 0.4; }
.hl-art-kb .kb-vector span:nth-child(5) { opacity: 0.9; }
.hl-art-kb .kb-vector span:nth-child(7) { opacity: 0.5; }
.hl-art-kb .kb-vector span:nth-child(8) { opacity: 0.8; }

/* art-vision 视觉模型 */
.hl-art-vision { gap: 6px; padding: 0 18px; }
.hl-art-vision .vimg {
  width: 50px; height: 64px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
  border: 1px solid var(--border);
  border-radius: 6px;
  position: relative; overflow: hidden;
}
.hl-art-vision .vimg::before, .hl-art-vision .vimg::after {
  content: ''; position: absolute; border-radius: 50%;
  background: rgba(167, 139, 250, 0.3);
}
.hl-art-vision .vimg::before { width: 14px; height: 14px; top: 9px; left: 8px; }
.hl-art-vision .vimg::after { width: 26px; height: 14px; bottom: 6px; left: 50%; transform: translateX(-50%); border-radius: 0 0 6px 6px / 0 0 30px 30px; background: rgba(139, 92, 246, 0.35); }
.hl-art-vision .vimg.accent { border-color: var(--accent); box-shadow: 0 0 16px rgba(139, 92, 246, 0.4); }

/* art-keys API Key 平台徽章 */
.hl-art-keys { flex-wrap: wrap; padding: 0 14px; gap: 6px; }
.hl-art-keys .key {
  font-size: 11px; padding: 5px 10px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-muted); font-weight: 600;
}
.hl-art-keys .key.active {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent-hover);
}

/* gallery-note 提示 */
.gallery-note {
  text-align: center; margin-top: 36px;
  color: var(--text-soft); font-size: 13px;
}
.gallery-note a { color: var(--accent-hover); border-bottom: 1px dashed var(--accent); padding-bottom: 1px; }
.gallery-note a:hover { color: var(--text); }

/* ====================  通用 section  ==================== */
section { padding: 100px 0; position: relative; }
.section-head { text-align: center; margin-bottom: 64px; }
.section-head h2 { margin: 18px 0 14px; }

/* ====================  Features 网格  ==================== */
.features {
  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);
  padding: 28px;
  transition: all 0.22s ease;
}
.feature-card:hover {
  border-color: rgba(139, 92, 246, 0.45);
  background: rgba(139, 92, 246, 0.03);
  transform: translateY(-3px);
}
.feature-icon {
  width: 44px; height: 44px;
  border-radius: 11px;
  background: var(--accent-soft);
  border: 1px solid rgba(139, 92, 246, 0.2);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
}
.feature-icon svg { width: 22px; height: 22px; color: var(--accent-hover); }
.feature-card h3 { margin-bottom: 8px; color: var(--text); }
.feature-card p { color: var(--text-muted); font-size: 14px; line-height: 1.7; }
.feature-card .tags {
  display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px;
}
.feature-card .tag {
  font-size: 11px; padding: 3px 9px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 99px;
  color: var(--text-soft);
}

/* ====================  Workflow 横向流程  ==================== */
.workflow-section { background: linear-gradient(180deg, transparent, rgba(139, 92, 246, 0.04) 50%, transparent); }
.workflow {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  margin-top: 50px;
}
.step {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 20px;
  position: relative;
  transition: border-color 0.2s;
}
.step:hover { border-color: var(--accent); }
.step-num {
  position: absolute; top: -10px; left: 20px;
  background: var(--accent); color: white;
  font-size: 12px; font-weight: 700;
  padding: 3px 9px; border-radius: 99px;
  letter-spacing: 0.5px;
}
.step h4 { font-size: 15px; margin: 10px 0 6px; }
.step p { color: var(--text-muted); font-size: 13px; line-height: 1.6; }

/* ====================  截图墙  ==================== */
.gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.shot {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-2);
  transition: all 0.25s ease;
  display: flex; flex-direction: column;
}
.shot:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 10px 40px rgba(139, 92, 246, 0.18);
}
.shot img { width: 100%; height: auto; aspect-ratio: 16/10; object-fit: cover; object-position: top; }
.shot-caption { padding: 14px 18px; }
.shot-caption h4 { font-size: 14px; margin-bottom: 4px; }
.shot-caption p { color: var(--text-soft); font-size: 12px; }

/* ====================  Platforms 5 平台 ==================== */
.platforms {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px;
  margin-top: 40px;
}
.platform {
  text-align: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 16px;
  transition: all 0.2s;
}
.platform:hover { border-color: var(--accent); background: var(--accent-soft); }
.platform .ico {
  width: 50px; height: 50px;
  margin: 0 auto 12px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.04);
  display: flex; align-items: center; justify-content: center;
  font-size: 26px;
}
.platform h4 { font-size: 15px; margin-bottom: 4px; }
.platform p { color: var(--text-soft); font-size: 12px; }

/* ====================  Pricing  ==================== */
.pricing-section { background: linear-gradient(180deg, transparent, rgba(139, 92, 246, 0.05) 100%); }
.pricing {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  max-width: 1000px; margin: 0 auto;
}
.plan-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  position: relative;
  transition: all 0.25s ease;
}
.plan-card.popular {
  border-color: var(--accent);
  background: linear-gradient(180deg, rgba(139, 92, 246, 0.08), var(--bg-2));
  box-shadow: 0 0 40px rgba(139, 92, 246, 0.18);
}
.plan-card.popular::before {
  content: '推荐'; position: absolute; top: -12px; right: 28px;
  background: var(--accent); color: white;
  padding: 4px 14px; border-radius: 99px;
  font-size: 11px; font-weight: 700; letter-spacing: 1px;
}
.plan-card:hover { transform: translateY(-4px); }
.plan-name { font-size: 18px; font-weight: 700; margin-bottom: 4px; }
.plan-days { color: var(--text-soft); font-size: 13px; margin-bottom: 22px; }
.plan-price {
  font-size: 48px; font-weight: 800;
  color: var(--accent-hover);
  display: flex; align-items: baseline; gap: 6px;
  margin-bottom: 8px; line-height: 1;
}
.plan-price .currency { font-size: 22px; color: var(--text-muted); font-weight: 600; }
.plan-price .unit { font-size: 14px; color: var(--text-soft); font-weight: 500; }
.plan-save {
  display: inline-block;
  font-size: 12px; color: var(--success); font-weight: 600;
  background: rgba(16, 185, 129, 0.1);
  padding: 3px 10px; border-radius: 99px;
  margin-bottom: 24px;
}
.plan-features { list-style: none; margin-bottom: 28px; }
.plan-features li {
  padding: 8px 0 8px 26px;
  color: var(--text-muted); font-size: 14px;
  position: relative;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.04);
}
.plan-features li:last-child { border-bottom: 0; }
.plan-features li::before {
  content: ''; position: absolute; left: 0; top: 14px;
  width: 14px; height: 14px;
  background: var(--success);
  mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'><path fill='currentColor' d='M9 16.17 4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z'/></svg>") center/contain no-repeat;
  -webkit-mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'><path fill='currentColor' d='M9 16.17 4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z'/></svg>") center/contain no-repeat;
}
.plan-cta {
  display: flex; justify-content: center;
  width: 100%; padding: 13px;
  background: var(--accent); color: white;
  border: 0; border-radius: var(--radius-sm);
  font-weight: 600; font-size: 14px;
  transition: all 0.18s;
}
.plan-cta:hover { background: var(--accent-hover); transform: translateY(-1px); }
.plan-card:not(.popular) .plan-cta {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  border: 1px solid var(--border-strong);
}
.plan-card:not(.popular) .plan-cta:hover { background: var(--accent); border-color: var(--accent); color: white; }
.pricing-foot { text-align: center; margin-top: 38px; color: var(--text-soft); font-size: 13px; }
.pricing-foot strong { color: var(--accent-hover); }

/* ====================  Audience 目标用户  ==================== */
.audience {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px;
}
.audience-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 22px;
  transition: all 0.22s;
}
.audience-card:hover { border-color: var(--accent); }
.audience-card .who { font-size: 14px; color: var(--accent-hover); font-weight: 600; margin-bottom: 8px; }
.audience-card h4 { font-size: 16px; margin-bottom: 8px; }
.audience-card p { color: var(--text-muted); font-size: 13px; line-height: 1.7; }

/* ====================  FAQ  ==================== */
.faq { max-width: 820px; margin: 0 auto; }
.faq details {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0;
  margin-bottom: 12px;
  transition: border-color 0.2s;
}
.faq details[open] { border-color: var(--accent); }
.faq summary {
  list-style: none;
  padding: 20px 24px;
  cursor: pointer;
  font-weight: 600; font-size: 15px;
  display: flex; justify-content: space-between; align-items: center;
  user-select: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ''; width: 14px; height: 14px;
  background: currentColor;
  mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'><path fill='currentColor' d='M16.59 8.59 12 13.17 7.41 8.59 6 10l6 6 6-6z'/></svg>") center/contain no-repeat;
  -webkit-mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'><path fill='currentColor' d='M16.59 8.59 12 13.17 7.41 8.59 6 10l6 6 6-6z'/></svg>") center/contain no-repeat;
  color: var(--text-soft);
  transition: transform 0.2s;
}
.faq details[open] summary::after { transform: rotate(180deg); color: var(--accent); }
.faq-answer {
  padding: 0 24px 22px;
  color: var(--text-muted);
  font-size: 14px; line-height: 1.8;
}

/* ====================  CTA Band  ==================== */
.cta-band {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.12) 0%, rgba(99, 102, 241, 0.08) 100%);
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: var(--radius-lg);
  padding: 56px 40px;
  text-align: center;
  margin: 40px auto;
  position: relative;
  overflow: hidden;
}
.cta-band::before {
  content: ''; position: absolute;
  width: 400px; height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.2) 0%, transparent 70%);
  top: -200px; left: -100px;
  filter: blur(40px);
}
.cta-band > * { position: relative; z-index: 1; }
.cta-band h2 { margin-bottom: 14px; }
.cta-band p { color: var(--text-muted); margin-bottom: 28px; font-size: 16px; }

/* ====================  Footer  ==================== */
footer {
  background: #0A0A0E;
  border-top: 1px solid var(--border);
  padding: 56px 0 28px;
  color: var(--text-soft);
  font-size: 13px;
}
.foot-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 40px;
}
.foot-grid h5 { color: var(--text); font-size: 14px; margin-bottom: 14px; font-weight: 600; }
.foot-grid ul { list-style: none; }
.foot-grid li { margin-bottom: 9px; }
.foot-grid a { color: var(--text-soft); transition: color 0.15s; }
.foot-grid a:hover { color: var(--accent-hover); }
.foot-brand p { margin-top: 14px; line-height: 1.7; max-width: 320px; }
.foot-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 14px;
  font-size: 12px;
}
.foot-bottom a { color: var(--text-soft); }
.foot-bottom a:hover { color: var(--accent-hover); }
.icp {
  font-size: 12px;
  color: var(--text-soft);
  letter-spacing: 0.2px;
}
/* Footer 客服微信二维码 */
.qr-contact { margin-top: 6px; max-width: 130px; }
.qr-contact img {
  width: 130px !important;
  height: 130px !important;
  max-width: 130px !important;
  background: white;
  padding: 6px;
  border-radius: 8px;
  display: block;
  margin: 0 0 10px 0;
  object-fit: contain;
}
.qr-contact .qr-tip { color: var(--text-muted); font-size: 12px; margin: 0 0 3px 0; line-height: 1.4; }
.qr-contact .qr-time { color: var(--text-soft); font-size: 11px; margin: 0; line-height: 1.4; }

/* ====================  Download Page  ==================== */
.dl-hero {
  padding: 130px 0 60px;
  text-align: center;
  position: relative;
}
.dl-hero::before {
  content: ''; position: absolute;
  width: 500px; height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.25) 0%, transparent 60%);
  filter: blur(80px);
  top: -150px; left: 50%; transform: translateX(-50%);
  pointer-events: none;
}
.dl-hero > * { position: relative; z-index: 1; }
.dl-card {
  max-width: 720px;
  margin: 40px auto 0;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  text-align: left;
}
.dl-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}
.dl-row:last-child { border-bottom: 0; }
.dl-row .label { color: var(--text-soft); font-size: 13px; }
.dl-row .value { color: var(--text); font-weight: 500; font-size: 14px; }
.dl-row code {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 12px;
  background: rgba(255, 255, 255, 0.04);
  padding: 3px 8px; border-radius: 6px;
  color: var(--accent-hover);
}
.dl-big {
  display: block;
  text-align: center;
  margin: 28px auto 8px;
  padding: 18px 36px;
  font-size: 17px;
}
.dl-note { text-align: center; color: var(--text-soft); font-size: 12px; margin-top: 6px; }
.dl-warn {
  margin-top: 22px; padding: 16px 18px;
  background: rgba(245, 158, 11, 0.06);
  border: 1px solid rgba(245, 158, 11, 0.3);
  border-radius: var(--radius);
  color: var(--text-muted); font-size: 13px; line-height: 1.7;
}
.dl-warn strong { color: var(--warning); }

/* ====================  响应式  ==================== */
@media (max-width: 1024px) {
  .features, .gallery, .audience, .highlights { grid-template-columns: repeat(2, 1fr); }
  .workflow { grid-template-columns: repeat(2, 1fr); }
  .platforms { grid-template-columns: repeat(3, 1fr); }
  .pricing { grid-template-columns: 1fr; max-width: 460px; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .mock-grid { grid-template-columns: 1fr; }
  .mock-card { min-height: auto; }
}
@media (max-width: 720px) {
  section { padding: 70px 0; }
  .hero { padding: 110px 0 60px; }
  .nav-links { display: none; }
  .nav-links.open {
    display: flex; flex-direction: column; gap: 0;
    position: absolute; top: 64px; left: 0; right: 0;
    background: var(--bg-2);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px;
  }
  .nav-links.open a { padding: 12px 0; border-bottom: 1px solid var(--border); }
  .nav-links.open a:last-child { border-bottom: 0; }
  .nav-toggle { display: block; }
  .features, .gallery, .audience, .platforms, .workflow, .highlights { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr; gap: 28px; }
  .hero-cta { flex-direction: column; align-items: stretch; }
  .btn { justify-content: center; }
  .cta-band { padding: 40px 22px; }
  .container { padding: 0 18px; }
  .mock-window { grid-template-columns: 48px 1fr; min-height: auto; }
  .mock-main { padding: 16px; }
  .mock-search { max-width: none; }
  .hero-mock { margin-top: 50px; }
  .hl-art-pipeline .line { width: 16px; }
}

/* ====================  动画  ==================== */
@keyframes float-up {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.hero h1, .hero-sub, .hero-cta, .hero-meta, .hero-screenshot {
  animation: float-up 0.7s ease forwards;
  opacity: 0;
}
.hero-sub { animation-delay: 0.1s; }
.hero-cta { animation-delay: 0.2s; }
.hero-meta { animation-delay: 0.3s; }
.hero-screenshot { animation-delay: 0.4s; }