/* ====== 基础 ====== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #0d0f14;
  --bg2: #141720;
  --bg3: #1c2030;
  --accent: #4f8ef7;
  --accent2: #7c5af5;
  --text: #e8eaf0;
  --text2: #9aa3b8;
  --border: rgba(255,255,255,.08);
  --card: #181c28;
  --radius: 14px;
  --shadow: 0 4px 32px rgba(0,0,0,.5);
}
html { scroll-behavior: smooth; }
body { background: var(--bg); color: var(--text); font-family: -apple-system,'PingFang SC','Microsoft YaHei',sans-serif; line-height: 1.6; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

/* ====== 导航 ====== */
#navbar { position: fixed; top: 0; left: 0; right: 0; z-index: 100; padding: 16px 0; transition: background .3s, backdrop-filter .3s; }
#navbar.scrolled { background: rgba(13,15,20,.9); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); }
.nav-inner { max-width: 1100px; margin: 0 auto; padding: 0 24px; display: flex; align-items: center; gap: 32px; }
.nav-logo { font-size: 1.2rem; font-weight: 700; letter-spacing: -.5px; }
.nav-logo span { color: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 28px; list-style: none; margin-left: auto; }
.nav-links a { color: var(--text2); font-size: .9rem; transition: color .2s; }
.nav-links a:hover, .nav-links a.active { color: var(--text); }
.btn-nav { background: var(--accent); color: #fff !important; padding: 8px 20px; border-radius: 8px; font-weight: 600; transition: opacity .2s !important; }
.btn-nav:hover { opacity: .85; }
.nav-hamburger { display: none; background: none; border: none; color: var(--text); font-size: 1.4rem; cursor: pointer; margin-left: auto; }

/* ====== 按钮 ====== */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 13px 30px; border-radius: 10px; font-size: .95rem; font-weight: 600; cursor: pointer; transition: all .2s; border: none; }
.btn-primary { background: linear-gradient(135deg, var(--accent), var(--accent2)); color: #fff; box-shadow: 0 4px 20px rgba(79,142,247,.35); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(79,142,247,.45); }
.btn-ghost { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn-outline { background: transparent; color: var(--accent); border: 1.5px solid var(--accent); width: 100%; }
.btn-outline:hover { background: var(--accent); color: #fff; }

/* ====== Section 通用 ====== */
section { padding: 100px 0; }
.section-title { font-size: clamp(1.7rem, 3vw, 2.2rem); font-weight: 700; text-align: center; margin-bottom: 12px; }
.section-sub { color: var(--text2); text-align: center; font-size: 1rem; margin-bottom: 56px; }

/* ====== Hero ====== */
.hero { min-height: 100vh; display: flex; align-items: center; position: relative; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; background: radial-gradient(ellipse 80% 60% at 50% 30%, rgba(79,142,247,.12) 0%, transparent 70%); pointer-events: none; }
.hero-content { position: relative; text-align: center; padding-top: 80px; }
.hero-badge { display: inline-block; background: rgba(79,142,247,.12); border: 1px solid rgba(79,142,247,.3); color: var(--accent); padding: 6px 16px; border-radius: 20px; font-size: .8rem; font-weight: 600; margin-bottom: 24px; letter-spacing: .5px; }
.hero h1 { font-size: clamp(2.8rem, 7vw, 5rem); font-weight: 800; line-height: 1.1; margin-bottom: 20px; letter-spacing: -1px; }
.hero h1 em { font-style: normal; background: linear-gradient(135deg, var(--accent), var(--accent2)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-sub { font-size: clamp(1rem, 2vw, 1.2rem); color: var(--text2); margin-bottom: 40px; line-height: 1.8; }
.hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 40px; }
.hero-meta { display: flex; gap: 24px; justify-content: center; flex-wrap: wrap; }
.hero-meta span { color: var(--text2); font-size: .85rem; }

/* ====== 功能 ====== */
.features { background: var(--bg2); }
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.feature-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 32px; transition: transform .2s, box-shadow .2s; }
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: rgba(79,142,247,.2); }
.feature-icon { font-size: 2rem; margin-bottom: 16px; }
.feature-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 10px; }
.feature-card p { color: var(--text2); font-size: .9rem; line-height: 1.7; }

/* ====== 截图 ====== */
.screenshots { background: var(--bg); }
.screenshot-slots { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; }
.screenshot-slot.placeholder { background: var(--bg3); border: 2px dashed var(--border); border-radius: var(--radius); aspect-ratio: 16/9; display: flex; align-items: center; justify-content: center; }
.placeholder-inner { text-align: center; color: var(--text2); }
.placeholder-inner span { font-size: 2.5rem; display: block; margin-bottom: 8px; }
.placeholder-inner small { font-size: .75rem; opacity: .6; }

/* ====== 价格 ====== */
.pricing { background: var(--bg2); }
.pricing-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 24px; max-width: 900px; margin: 0 auto 32px; }
.pricing-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 36px 28px; text-align: center; position: relative; transition: transform .2s; }
.pricing-card.popular { border-color: var(--accent); box-shadow: 0 0 40px rgba(79,142,247,.15); transform: scale(1.03); }
.pricing-card:hover { transform: scale(1.02); }
.pricing-card.popular:hover { transform: scale(1.05); }
.pricing-badge { position: absolute; top: -12px; left: 50%; transform: translateX(-50%); background: linear-gradient(135deg, var(--accent), var(--accent2)); color: #fff; font-size: .75rem; font-weight: 700; padding: 4px 14px; border-radius: 20px; white-space: nowrap; }
.pricing-tier { color: var(--text2); font-size: .9rem; margin-bottom: 8px; text-transform: uppercase; letter-spacing: 1px; }
.pricing-price { font-size: 3rem; font-weight: 800; line-height: 1; }
.pricing-price span { font-size: 3.5rem; }
.pricing-cycle { color: var(--text2); font-size: .85rem; margin-bottom: 28px; }
.pricing-features { list-style: none; text-align: left; margin-bottom: 28px; }
.pricing-features li { padding: 6px 0; color: var(--text2); font-size: .9rem; border-bottom: 1px solid var(--border); }
.pricing-features li:last-child { border-bottom: none; }
.pricing-note { text-align: center; color: var(--text2); font-size: .85rem; }

/* ====== 下载 ====== */
.download { background: var(--bg); }
.download-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 28px; max-width: 700px; margin: 0 auto 60px; }
.download-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 36px 28px; text-align: center; }
.download-icon { font-size: 2.5rem; margin-bottom: 12px; }
.download-card h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 6px; }
.dl-filename { color: var(--text2); font-size: .8rem; font-family: monospace; margin-bottom: 20px; }
.qr-wrap { background: #fff; border-radius: 10px; padding: 12px; width: 160px; margin: 0 auto 14px; }
.qr-wrap img { width: 100%; border-radius: 6px; }
.qr-tip { color: var(--text2); font-size: .85rem; margin-bottom: 20px; }
.install-steps { background: var(--bg3); border-radius: var(--radius); padding: 40px; }
.install-steps h3 { text-align: center; margin-bottom: 32px; font-size: 1.1rem; }
.steps { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 12px; }
.step { text-align: center; min-width: 120px; }
.step-num { width: 40px; height: 40px; background: linear-gradient(135deg, var(--accent), var(--accent2)); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 700; margin: 0 auto 10px; font-size: 1.1rem; }
.step p { font-size: .9rem; }
.step p small { color: var(--text2); font-size: .78rem; }
.step-arrow { color: var(--accent); font-size: 1.5rem; opacity: .5; }

/* ====== Footer ====== */
.footer { background: var(--bg2); border-top: 1px solid var(--border); padding: 48px 0; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 24px; }
.footer-brand strong { font-size: 1.1rem; }
.footer-brand p { color: var(--text2); font-size: .85rem; margin-top: 4px; }
.footer-links { display: flex; gap: 24px; }
.footer-links a { color: var(--text2); font-size: .9rem; transition: color .2s; }
.footer-links a:hover { color: var(--text); }
.footer-copy { color: var(--text2); font-size: .8rem; width: 100%; text-align: center; margin-top: 24px; }

/* ====== 画廊 ====== */
.screenshots { background: var(--bg); }
.gallery { display: flex; flex-direction: column; gap: 16px; }
.gallery-main { border-radius: var(--radius); overflow: hidden; background: var(--bg3); aspect-ratio: 16/9; cursor: zoom-in; position: relative; }
.gallery-main img { width: 100%; height: 100%; object-fit: cover; transition: transform .3s; }
.gallery-main:hover img { transform: scale(1.01); }
.gallery-thumbs { display: grid; grid-template-columns: repeat(auto-fill, minmax(90px, 1fr)); gap: 10px; }
.gallery-thumb { border-radius: 8px; overflow: hidden; cursor: pointer; border: 2px solid transparent; transition: border-color .2s, transform .15s; aspect-ratio: 16/9; background: var(--bg3); }
.gallery-thumb img { width: 100%; height: 100%; object-fit: cover; }
.gallery-thumb:hover { border-color: var(--accent); transform: scale(1.03); }
.gallery-thumb.active { border-color: var(--accent2); }

/* ====== 灯箱 ====== */
.lightbox { display: none; position: fixed; inset: 0; background: rgba(0,0,0,.92); z-index: 500; align-items: center; justify-content: center; }
.lightbox.open { display: flex; }
.lb-img { max-width: 90vw; max-height: 82vh; border-radius: 10px; object-fit: contain; }
.lb-close, .lb-prev, .lb-next { position: fixed; background: rgba(255,255,255,.08); border: none; color: #fff; font-size: 1.6rem; cursor: pointer; border-radius: 50%; width: 44px; height: 44px; display: flex; align-items: center; justify-content: center; transition: background .2s; }
.lb-close:hover, .lb-prev:hover, .lb-next:hover { background: rgba(255,255,255,.18); }
.lb-close { top: 20px; right: 24px; font-size: 1.4rem; }
.lb-prev { left: 16px; top: 50%; transform: translateY(-50%); }
.lb-next { right: 16px; top: 50%; transform: translateY(-50%); }
.lb-caption { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%); background: rgba(0,0,0,.6); color: var(--text2); font-size: .85rem; padding: 6px 20px; border-radius: 20px; white-space: nowrap; }

/* ====== 视频演示 ====== */
.demo { background: var(--bg2); }
.demo-wrap { background: var(--bg3); border-radius: var(--radius); overflow: hidden; aspect-ratio: 16/9; margin-bottom: 40px; }
.video-placeholder { width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; cursor: pointer; }
.video-ph-inner { text-align: center; color: var(--text2); }
.play-btn { background: linear-gradient(135deg, var(--accent), var(--accent2)); border: none; border-radius: 50%; width: 72px; height: 72px; cursor: pointer; display: flex; align-items: center; justify-content: center; margin: 0 auto 16px; transition: transform .2s, box-shadow .2s; box-shadow: 0 0 30px rgba(79,142,247,.5); }
.play-btn:hover { transform: scale(1.1); box-shadow: 0 0 44px rgba(79,142,247,.7); }
.play-icon { color: #fff; font-size: 1.6rem; margin-left: 4px; }
.video-ph-tip { font-size: 1rem; margin-bottom: 6px; color: var(--text); }
.video-embed { width: 100%; height: 100%; }
.video-embed iframe { width: 100%; height: 100%; border: none; }
.demo-points { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 20px; }
.demo-point { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; text-align: center; }
.demo-point span { font-size: 1.8rem; font-weight: 800; background: linear-gradient(135deg, var(--accent), var(--accent2)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; display: block; margin-bottom: 8px; }
.demo-point p { font-size: .9rem; color: var(--text2); }

/* ====== 购买引导 ====== */
.pricing-how { background: var(--bg3); border-radius: var(--radius); padding: 40px; margin-top: 40px; }
.pricing-how h3 { text-align: center; margin-bottom: 32px; font-size: 1.15rem; }
.buy-guide { display: flex; align-items: center; gap: 40px; flex-wrap: wrap; justify-content: center; }
.buy-qr { text-align: center; flex-shrink: 0; }
.buy-qr .qr-box { width: 140px; margin: 0 auto 10px; }
.buy-qr-label { font-size: .85rem; color: var(--text2); line-height: 1.6; }
.how-steps { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; }
.how-step { text-align: center; min-width: 110px; }
.how-num { width: 36px; height: 36px; background: linear-gradient(135deg, var(--accent), var(--accent2)); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 700; margin: 0 auto 8px; font-size: 1rem; }
.how-step p { font-size: .85rem; color: var(--text2); line-height: 1.5; }
.how-arrow { color: var(--accent); font-size: 1.3rem; opacity: .5; }

/* ====== 社区二维码 ====== */
.community { background: var(--bg2); }
.qr-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 24px; }
.qr-item { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px 20px; text-align: center; transition: transform .2s; }
.qr-item:hover { transform: translateY(-4px); border-color: rgba(79,142,247,.25); }
.qr-item .qr-box { width: 130px; margin: 0 auto 14px; background: #fff; border-radius: 10px; padding: 10px; }
.qr-item .qr-box img { width: 100%; border-radius: 6px; }
.qr-item h3 { font-size: .9rem; font-weight: 700; margin-bottom: 6px; }
.qr-item p { color: var(--text2); font-size: .8rem; }

/* ====== 关于 ====== */
.about { background: var(--bg); }
.about-inner { display: grid; grid-template-columns: 1fr 220px; gap: 60px; align-items: center; }
.about-text h2 { font-size: 2rem; margin-bottom: 20px; }
.about-text p { color: var(--text2); font-size: .95rem; line-height: 1.8; margin-bottom: 16px; }
.about-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.about-tags span { background: var(--bg3); border: 1px solid var(--border); border-radius: 20px; padding: 5px 14px; font-size: .82rem; color: var(--text2); }
.about-qr { text-align: center; }
.about-qr .qr-box { background: #fff; border-radius: 12px; padding: 12px; margin-bottom: 12px; }
.about-qr .qr-box img { width: 100%; border-radius: 6px; }
.about-qr p { color: var(--text2); font-size: .85rem; line-height: 1.6; }

/* ====== Footer 列 ====== */
.footer-cols { display: flex; gap: 48px; }
.footer-cols div { display: flex; flex-direction: column; gap: 10px; }
.footer-cols h4 { font-size: .8rem; text-transform: uppercase; letter-spacing: 1px; color: var(--text2); margin-bottom: 4px; }
.footer-cols a { color: var(--text2); font-size: .85rem; transition: color .2s; }
.footer-cols a:hover { color: var(--text); }

/* ====== 响应式补充 ====== */
@media (max-width: 900px) {
  .about-inner { grid-template-columns: 1fr; }
  .about-qr { display: flex; align-items: center; gap: 20px; justify-content: flex-start; }
  .about-qr .qr-box { width: 100px; flex-shrink: 0; }
  .footer-inner { flex-direction: column; }
  .footer-cols { flex-wrap: wrap; gap: 24px; }
}
@media (max-width: 600px) {
  .gallery-thumbs { grid-template-columns: repeat(4, 1fr); }
  .how-steps { flex-direction: column; }
  .how-arrow { transform: rotate(90deg); }
  .qr-grid { grid-template-columns: repeat(2, 1fr); }
  .demo-points { grid-template-columns: repeat(2, 1fr); }
  .buy-guide { flex-direction: column; }
}
  .nav-links { display: none; flex-direction: column; position: absolute; top: 100%; left: 0; right: 0; background: var(--bg); border-bottom: 1px solid var(--border); padding: 16px; gap: 12px; }
  .nav-links.open { display: flex; }
  .nav-hamburger { display: block; }
  .hero-btns { flex-direction: column; align-items: center; }
  .hero-meta { flex-direction: column; gap: 8px; }
  .steps { flex-direction: column; }
  .step-arrow { transform: rotate(90deg); }
  .footer-inner { flex-direction: column; text-align: center; }
  .footer-links { justify-content: center; }
  .pricing-card.popular { transform: none; }
}

/* ====== about.html 专属样式 ====== */
.about-hero { min-height: 40vh; display: flex; align-items: center; padding: 100px 0 60px; position: relative; overflow: hidden; }
.about-hero-bg { position: absolute; inset: 0; background: radial-gradient(ellipse 60% 80% at 30% 50%, rgba(79,142,247,.1) 0%, transparent 70%); pointer-events: none; }
.about-hero-content { position: relative; }
.about-hero-content .hero-badge { display: inline-block; background: rgba(79,142,247,.12); border: 1px solid rgba(79,142,247,.3); color: var(--accent); padding: 6px 16px; border-radius: 20px; font-size: .8rem; font-weight: 600; margin-bottom: 20px; }
.about-hero-content h1 { font-size: clamp(2rem,5vw,3.2rem); font-weight: 800; margin-bottom: 12px; }
.about-hero-content h1 em { font-style: normal; background: linear-gradient(135deg, var(--accent), var(--accent2)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.about-hero-sub { color: var(--text2); font-size: 1.1rem; }

.about-article { padding: 60px 0 80px; }
.about-block { max-width: 760px; margin: 0 auto 48px; }
.about-block h2 { font-size: 1.35rem; font-weight: 700; margin-bottom: 18px; }
.about-block p { color: var(--text2); line-height: 1.9; margin-bottom: 14px; font-size: .96rem; }
.about-block strong { color: var(--text); }
.about-list { list-style: none; padding: 0; margin-bottom: 14px; }
.about-list li { color: var(--text2); font-size: .95rem; line-height: 1.8; padding: 8px 0 8px 20px; border-bottom: 1px solid var(--border); position: relative; }
.about-list li::before { content: '▸'; position: absolute; left: 0; color: var(--accent); }
.about-list li:last-child { border-bottom: none; }

.about-values { max-width: 760px; margin: 0 auto 48px; display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 20px; }
.value-item { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px 20px; text-align: center; }
.value-item span { font-size: 2rem; display: block; margin-bottom: 10px; }
.value-item h3 { font-size: .95rem; font-weight: 700; margin-bottom: 6px; }
.value-item p { color: var(--text2); font-size: .82rem; margin: 0; }

.about-cta { max-width: 760px; margin: 0 auto; background: var(--bg3); border-radius: var(--radius); padding: 48px; display: flex; gap: 40px; align-items: center; border: 1px solid var(--border); }
.about-cta-qr .qr-box { width: 140px; background: #fff; border-radius: 12px; padding: 10px; flex-shrink: 0; }
.about-cta-qr .qr-box img { width: 100%; border-radius: 6px; }
.about-cta-text h2 { font-size: 1.4rem; margin-bottom: 14px; }
.about-cta-text p { color: var(--text2); font-size: .9rem; line-height: 1.8; margin-bottom: 24px; }
.about-cta-btns { display: flex; gap: 12px; flex-wrap: wrap; }

/* 滚动进度条 + 回顶按钮 */
#scrollProg { position: fixed; top: 0; left: 0; height: 3px; background: linear-gradient(90deg, var(--accent), var(--accent2)); z-index: 200; width: 0; transition: width .1s; }
#toTop { position: fixed; bottom: 28px; right: 24px; width: 44px; height: 44px; border-radius: 50%; background: var(--card); border: 1px solid var(--border); color: var(--text2); font-size: 1.1rem; cursor: pointer; opacity: 0; pointer-events: none; transition: opacity .3s, background .2s; z-index: 100; }
#toTop.show { opacity: 1; pointer-events: all; }
#toTop:hover { background: var(--bg3); color: var(--text); }

/* 滚动渐显（需 .js-reveal 类存在才生效，纯CSS兜底） */
.js-reveal .reveal { opacity: 0; transform: translateY(24px); transition: opacity .55s, transform .55s; }
.js-reveal .reveal.is-visible { opacity: 1; transform: none; }
.js-reveal .reveal-stagger .value-item { opacity: 0; transform: translateY(20px); transition: opacity .4s, transform .4s; }
.js-reveal .reveal-stagger.is-visible .value-item:nth-child(1) { opacity:1; transform:none; transition-delay:.05s; }
.js-reveal .reveal-stagger.is-visible .value-item:nth-child(2) { opacity:1; transform:none; transition-delay:.15s; }
.js-reveal .reveal-stagger.is-visible .value-item:nth-child(3) { opacity:1; transform:none; transition-delay:.25s; }
.js-reveal .reveal-stagger.is-visible .value-item:nth-child(4) { opacity:1; transform:none; transition-delay:.35s; }

@media (max-width: 640px) {
  .about-cta { flex-direction: column; padding: 32px 24px; }
  .about-cta-btns { flex-direction: column; }
  .about-values { grid-template-columns: repeat(2, 1fr); }
}

/* ====== 视频演示 ====== */
.demo { background: var(--bg2); }
.demo-wrap { max-width: 860px; margin: 0 auto 40px; }
.video-placeholder { position: relative; aspect-ratio: 16/9; background: linear-gradient(135deg, var(--bg3), var(--card)); border: 1px solid var(--border); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; cursor: pointer; overflow: hidden; }
.video-placeholder::before { content: ""; position: absolute; inset: 0; background: radial-gradient(ellipse 60% 60% at 50% 50%, rgba(79,142,247,.15), transparent 70%); }
.video-ph-inner { position: relative; text-align: center; }
.play-btn { width: 72px; height: 72px; border-radius: 50%; border: none; background: linear-gradient(135deg, var(--accent), var(--accent2)); color: #fff; cursor: pointer; box-shadow: 0 8px 30px rgba(79,142,247,.5); transition: transform .2s; margin-bottom: 16px; }
.play-btn:hover { transform: scale(1.1); }
.play-icon { font-size: 1.6rem; margin-left: 4px; }
.video-ph-tip { font-size: 1rem; font-weight: 600; margin-bottom: 6px; }
.video-ph-inner small { color: var(--text2); font-size: .82rem; }
.video-embed { position: relative; aspect-ratio: 16/9; border-radius: var(--radius); overflow: hidden; }
.video-embed iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.demo-points { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px,1fr)); gap: 20px; }
.demo-point { display: flex; align-items: center; gap: 12px; background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 16px 20px; }
.demo-point span { font-size: 1.3rem; font-weight: 800; background: linear-gradient(135deg, var(--accent), var(--accent2)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.demo-point p { font-size: .9rem; }

/* ====== 购买指引 ====== */
.pricing-how { background: var(--bg3); border-radius: var(--radius); padding: 40px; margin-top: 40px; }
.pricing-how h3 { text-align: center; margin-bottom: 32px; font-size: 1.2rem; }
.buy-guide { display: flex; align-items: center; justify-content: center; gap: 48px; flex-wrap: wrap; }
.buy-qr { text-align: center; flex-shrink: 0; }
.buy-qr .qr-box { width: 150px; }
.buy-qr-label { margin-top: 14px; font-size: .9rem; color: var(--text2); }
.buy-qr-label strong { color: var(--text); }
.how-steps { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 12px; }
.how-step { text-align: center; min-width: 110px; }
.how-num { width: 40px; height: 40px; background: linear-gradient(135deg, var(--accent), var(--accent2)); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 700; margin: 0 auto 10px; }
.how-step p { font-size: .88rem; }
.how-arrow { color: var(--accent); font-size: 1.4rem; opacity: .5; }

/* ====== 社区 / 二维码 ====== */
.community { background: var(--bg); }
.qr-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px,1fr)); gap: 24px; }
.qr-item { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px 20px; text-align: center; transition: transform .2s, border-color .2s; }
.qr-item:hover { transform: translateY(-4px); border-color: rgba(79,142,247,.3); }
.qr-box { background: #fff; border-radius: 10px; padding: 10px; width: 140px; margin: 0 auto 16px; }
.qr-box img { width: 100%; border-radius: 6px; }
.qr-item h3 { font-size: .98rem; margin-bottom: 8px; }
.qr-item p { color: var(--text2); font-size: .84rem; line-height: 1.6; }

/* ====== 关于 ====== */
.about { background: var(--bg2); }
.about-inner { display: flex; align-items: center; gap: 56px; flex-wrap: wrap; }
.about-text { flex: 1; min-width: 300px; }
.about-text h2 { font-size: clamp(1.6rem,3vw,2rem); margin-bottom: 20px; }
.about-text p { color: var(--text2); margin-bottom: 16px; line-height: 1.8; }
.about-tags { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.about-tags span { background: var(--bg3); border: 1px solid var(--border); border-radius: 20px; padding: 6px 16px; font-size: .82rem; color: var(--text2); }
.about-qr { text-align: center; flex-shrink: 0; }
.about-qr .qr-box { width: 150px; }
.about-qr p { color: var(--text2); font-size: .85rem; margin-top: 14px; }

@media (max-width: 768px) {
  .buy-guide { gap: 28px; }
  .how-steps { flex-direction: column; }
  .how-arrow { transform: rotate(90deg); }
  .about-inner { flex-direction: column-reverse; text-align: center; }
  .about-tags { justify-content: center; }
}

/* ====== 关于作者页 (about.html) ====== */
.about-hero { position: relative; padding: 160px 0 80px; text-align: center; overflow: hidden; }
.about-hero-bg { position: absolute; inset: 0; background: radial-gradient(ellipse 70% 60% at 50% 20%, rgba(124,90,245,.16), transparent 70%); pointer-events: none; }
.about-hero-content { position: relative; }
.about-hero h1 { font-size: clamp(2.2rem,5vw,3.4rem); font-weight: 800; margin: 18px 0 14px; }
.about-hero h1 em { font-style: normal; background: linear-gradient(135deg, var(--accent), var(--accent2)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.about-hero-sub { color: var(--text2); font-size: 1.05rem; }
.about-article { padding: 40px 0 100px; background: var(--bg); }
.about-block { max-width: 760px; margin: 0 auto 48px; }
.about-block h2 { font-size: 1.4rem; font-weight: 700; margin-bottom: 18px; }
.about-block p { color: var(--text2); line-height: 1.9; margin-bottom: 16px; }
.about-block strong { color: var(--text); }
.about-list { list-style: none; margin: 0 0 16px; }
.about-list li { position: relative; padding: 10px 0 10px 26px; color: var(--text2); line-height: 1.8; border-bottom: 1px solid var(--border); }
.about-list li::before { content: "▸"; position: absolute; left: 0; color: var(--accent); font-weight: 700; }
.about-list li strong { color: var(--text); }
.about-values { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px,1fr)); gap: 20px; max-width: 900px; }
.value-item { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px 20px; text-align: center; }
.value-item span { font-size: 2rem; display: block; margin-bottom: 12px; }
.value-item h3 { font-size: 1rem; margin-bottom: 8px; }
.value-item p { color: var(--text2); font-size: .84rem; line-height: 1.6; }
.about-cta { display: flex; align-items: center; gap: 48px; max-width: 820px; margin: 64px auto 0; background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 44px; flex-wrap: wrap; }
.about-cta-qr { flex-shrink: 0; }
.about-cta-qr .qr-box { width: 150px; }
.about-cta-text { flex: 1; min-width: 260px; }
.about-cta-text h2 { font-size: 1.4rem; margin-bottom: 14px; }
.about-cta-text p { color: var(--text2); line-height: 1.8; margin-bottom: 22px; }
.about-cta-text strong { color: var(--text); }
.about-cta-btns { display: flex; gap: 14px; flex-wrap: wrap; }

@media (max-width: 768px) {
  .about-cta { flex-direction: column; text-align: center; padding: 32px 24px; }
  .about-cta-btns { justify-content: center; }
}

/* ============================================================
   ===============  BEAUTIFY LAYER (v2 polish)  ===============
   Appended overrides — richer gradients, motion, micro-interactions
   ============================================================ */

/* ---- smoother base + custom scrollbar ---- */
html { scroll-padding-top: 80px; }
body { -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
::selection { background: rgba(124,90,245,.35); color: #fff; }
* { scrollbar-width: thin; scrollbar-color: var(--accent2) transparent; }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: linear-gradient(var(--accent), var(--accent2)); border-radius: 8px; border: 2px solid var(--bg); }
::-webkit-scrollbar-track { background: var(--bg); }

/* ---- scroll reveal (JS adds .reveal, then .is-visible) ---- */
.js-reveal .reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s cubic-bezier(.22,.61,.36,1), transform .7s cubic-bezier(.22,.61,.36,1); will-change: opacity, transform; }
.reveal.is-visible { opacity: 1; transform: none; }
.js-reveal .reveal-stagger > * { opacity: 0; transform: translateY(28px); transition: opacity .6s cubic-bezier(.22,.61,.36,1), transform .6s cubic-bezier(.22,.61,.36,1); }
.reveal-stagger.is-visible > * { opacity: 1; transform: none; }
.reveal-stagger.is-visible > *:nth-child(1){ transition-delay:.05s } .reveal-stagger.is-visible > *:nth-child(2){ transition-delay:.12s }
.reveal-stagger.is-visible > *:nth-child(3){ transition-delay:.19s } .reveal-stagger.is-visible > *:nth-child(4){ transition-delay:.26s }
.reveal-stagger.is-visible > *:nth-child(5){ transition-delay:.33s } .reveal-stagger.is-visible > *:nth-child(6){ transition-delay:.40s }

/* ---- nav polish ---- */
.nav-logo { transition: transform .2s; }
.nav-logo:hover { transform: translateY(-1px); }
.nav-links a:not(.btn-nav) { position: relative; }
.nav-links a:not(.btn-nav)::after { content:""; position:absolute; left:0; right:0; bottom:-6px; height:2px; border-radius:2px; background:linear-gradient(90deg,var(--accent),var(--accent2)); transform:scaleX(0); transform-origin:left; transition:transform .25s ease; }
.nav-links a:not(.btn-nav):hover::after, .nav-links a.active::after { transform:scaleX(1); }
.btn-nav { box-shadow: 0 4px 16px rgba(79,142,247,.4); }
.btn-nav:hover { transform: translateY(-1px); opacity: 1 !important; box-shadow: 0 6px 22px rgba(79,142,247,.55); }

/* ---- animated hero background (aurora blobs + grid) ---- */
.hero { background:
    radial-gradient(1200px 600px at 80% -10%, rgba(124,90,245,.10), transparent 60%),
    radial-gradient(900px 500px at 0% 20%, rgba(79,142,247,.10), transparent 55%); }
.hero::before { content:""; position:absolute; inset:0; z-index:0; pointer-events:none;
  background-image: linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 46px 46px; mask-image: radial-gradient(ellipse 70% 60% at 50% 35%, #000 40%, transparent 75%); -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 35%, #000 40%, transparent 75%); }
.hero-bg::before, .hero-bg::after { content:""; position:absolute; border-radius:50%; filter:blur(70px); opacity:.5; }
.hero-bg::before { width:460px; height:460px; background:radial-gradient(circle, rgba(79,142,247,.55), transparent 65%); top:-80px; left:8%; animation:floatA 14s ease-in-out infinite; }
.hero-bg::after { width:420px; height:420px; background:radial-gradient(circle, rgba(124,90,245,.5), transparent 65%); bottom:-120px; right:6%; animation:floatB 17s ease-in-out infinite; }
@keyframes floatA { 0%,100%{ transform:translate(0,0) } 50%{ transform:translate(40px,30px) } }
@keyframes floatB { 0%,100%{ transform:translate(0,0) } 50%{ transform:translate(-36px,-28px) } }

/* ---- hero content entrance + gradient shimmer on title ---- */
.hero-content { animation: heroIn 1s cubic-bezier(.22,.61,.36,1) both; }
@keyframes heroIn { from{ opacity:0; transform:translateY(20px) } to{ opacity:1; transform:none } }
.hero h1 em { background: linear-gradient(100deg, var(--accent), var(--accent2), #58e6c9, var(--accent)); background-size: 280% 100%; -webkit-background-clip:text; background-clip:text; animation: shimmer 6s linear infinite; }
@keyframes shimmer { to { background-position: 280% 0; } }
.hero-badge { backdrop-filter: blur(6px); animation: badgePulse 3.2s ease-in-out infinite; }
@keyframes badgePulse { 0%,100%{ box-shadow:0 0 0 0 rgba(79,142,247,.0) } 50%{ box-shadow:0 0 0 6px rgba(79,142,247,.06) } }
.hero-meta span { transition: color .2s; }
.hero-meta span:hover { color: var(--accent); }

/* ---- shiny buttons ---- */
.btn { position: relative; overflow: hidden; }
.btn-primary::before { content:""; position:absolute; top:0; left:-120%; width:60%; height:100%; background:linear-gradient(120deg, transparent, rgba(255,255,255,.35), transparent); transform:skewX(-20deg); transition:left .6s ease; }
.btn-primary:hover::before { left:130%; }

/* ---- section titles: gradient underline accent ---- */
.section-title { position: relative; }
.section-title::after { content:""; display:block; width:56px; height:4px; margin:16px auto 0; border-radius:4px; background:linear-gradient(90deg,var(--accent),var(--accent2)); }

/* ---- feature cards: gradient border glow + icon pop ---- */
.feature-card { position: relative; background: linear-gradient(var(--card),var(--card)) padding-box, linear-gradient(135deg, transparent, transparent) border-box; border:1px solid var(--border); transition: transform .28s cubic-bezier(.22,.61,.36,1), box-shadow .28s, border-color .28s; }
.feature-card::after { content:""; position:absolute; inset:0; border-radius:var(--radius); padding:1px; background:linear-gradient(135deg, rgba(79,142,247,.6), rgba(124,90,245,.6)); -webkit-mask:linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); -webkit-mask-composite:xor; mask-composite:exclude; opacity:0; transition:opacity .3s; }
.feature-card:hover { transform: translateY(-6px); box-shadow: 0 18px 40px rgba(0,0,0,.45); }
.feature-card:hover::after { opacity:1; }
.feature-icon { display:inline-flex; width:56px; height:56px; align-items:center; justify-content:center; border-radius:14px; background:linear-gradient(135deg, rgba(79,142,247,.16), rgba(124,90,245,.16)); border:1px solid var(--border); transition: transform .28s; }
.feature-card:hover .feature-icon { transform: scale(1.12) rotate(-4deg); }

/* ---- screenshot placeholders shimmer ---- */
.screenshot-slot.placeholder { position:relative; overflow:hidden; transition:border-color .3s; }
.screenshot-slot.placeholder:hover { border-color: rgba(79,142,247,.4); }
.screenshot-slot.placeholder::after { content:""; position:absolute; inset:0; background:linear-gradient(110deg, transparent 30%, rgba(255,255,255,.05) 50%, transparent 70%); transform:translateX(-100%); animation:sweep 3.5s ease-in-out infinite; }
@keyframes sweep { 0%,60%{ transform:translateX(-100%) } 100%{ transform:translateX(100%) } }

/* ---- pricing polish ---- */
.pricing-card { transition: transform .28s cubic-bezier(.22,.61,.36,1), box-shadow .28s, border-color .28s; }
.pricing-card:hover { box-shadow: 0 18px 44px rgba(0,0,0,.45); border-color: rgba(79,142,247,.35); }
.pricing-card.popular { background: linear-gradient(180deg, rgba(79,142,247,.06), var(--card)); }
.pricing-badge { animation: badgePulse 3s ease-in-out infinite; }
.pricing-price span { background:linear-gradient(135deg,var(--accent),var(--accent2)); -webkit-background-clip:text; background-clip:text; -webkit-text-fill-color:transparent; }
.pricing-features li { transition: color .2s, padding-left .2s; }
.pricing-features li:hover { color: var(--text); padding-left: 4px; }

/* ---- qr / download cards lift ---- */
.qr-item, .download-card { transition: transform .28s cubic-bezier(.22,.61,.36,1), box-shadow .28s, border-color .28s; }
.download-card:hover { transform: translateY(-6px); box-shadow: 0 18px 40px rgba(0,0,0,.45); border-color: rgba(79,142,247,.3); }
.qr-box img, .qr-wrap img { transition: transform .3s; }
.qr-item:hover .qr-box img, .download-card:hover .qr-wrap img { transform: scale(1.04); }

/* ---- demo play button pulse ring ---- */
.play-btn { position: relative; }
.play-btn::after { content:""; position:absolute; inset:-10px; border-radius:50%; border:2px solid rgba(79,142,247,.5); animation:ring 2.2s ease-out infinite; }
@keyframes ring { 0%{ transform:scale(.85); opacity:.8 } 100%{ transform:scale(1.5); opacity:0 } }
.demo-point { transition: transform .25s, border-color .25s, background .25s; }
.demo-point:hover { transform: translateY(-3px); border-color: rgba(79,142,247,.4); background: var(--bg3); }

/* ---- value items (about page) ---- */
.value-item { transition: transform .28s, box-shadow .28s, border-color .28s; }
.value-item:hover { transform: translateY(-5px); box-shadow: 0 14px 34px rgba(0,0,0,.4); border-color: rgba(124,90,245,.35); }
.about-tags span { transition: transform .2s, border-color .2s, color .2s; }
.about-tags span:hover { transform: translateY(-2px); border-color: var(--accent); color: var(--text); }

/* ---- footer link underline ---- */
.footer-cols a { position: relative; transition: color .2s, padding-left .2s; }
.footer-cols a:hover { color: var(--accent); padding-left: 4px; }

/* ---- back-to-top button (injected by JS) ---- */
#toTop { position: fixed; right: 22px; bottom: 22px; width: 46px; height: 46px; border-radius: 50%; border: none; cursor: pointer; z-index: 200; background: linear-gradient(135deg, var(--accent), var(--accent2)); color:#fff; font-size: 1.2rem; box-shadow: 0 8px 24px rgba(79,142,247,.45); opacity: 0; pointer-events: none; transform: translateY(12px) scale(.9); transition: opacity .3s, transform .3s; }
#toTop.show { opacity: 1; pointer-events: auto; transform: none; }
#toTop:hover { transform: translateY(-3px); box-shadow: 0 12px 30px rgba(79,142,247,.6); }

/* ---- scroll progress bar (injected by JS) ---- */
#scrollProg { position: fixed; top: 0; left: 0; height: 3px; width: 0; z-index: 300; background: linear-gradient(90deg, var(--accent), var(--accent2), #58e6c9); box-shadow: 0 0 10px rgba(79,142,247,.6); transition: width .1s linear; }

/* ---- respect reduced motion ---- */
@media (prefers-reduced-motion: reduce) {
  .reveal, .reveal-stagger > * { opacity: 1 !important; transform: none !important; transition: none !important; }
  .hero-bg::before, .hero-bg::after, .hero h1 em, .hero-badge, .screenshot-slot.placeholder::after, .play-btn::after, .pricing-badge, .hero-content { animation: none !important; }
  html { scroll-behavior: auto; }
}

/* ============================================================
   ===============  SCREENSHOT GALLERY + LIGHTBOX  ============
   ============================================================ */
.gallery { max-width: 960px; margin: 0 auto; }
.gallery-main { position: relative; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); background: var(--bg3); box-shadow: 0 20px 60px rgba(0,0,0,.5); cursor: zoom-in; }
.gallery-main img { width: 100%; display: block; aspect-ratio: 1855/1000; object-fit: cover; transition: transform .5s cubic-bezier(.22,.61,.36,1), opacity .35s; }
.gallery-main:hover img { transform: scale(1.02); }
.gallery-main img.swapping { opacity: 0; }
.gallery-zoom { position: absolute; top: 14px; right: 14px; background: rgba(13,15,20,.72); backdrop-filter: blur(6px); color: #fff; border: 1px solid var(--border); padding: 7px 14px; border-radius: 8px; font-size: .82rem; cursor: pointer; opacity: 0; transform: translateY(-6px); transition: opacity .25s, transform .25s; }
.gallery-main:hover .gallery-zoom { opacity: 1; transform: none; }
.gallery-main figcaption { position: absolute; left: 0; right: 0; bottom: 0; padding: 40px 20px 16px; font-size: .92rem; color: #fff; background: linear-gradient(to top, rgba(0,0,0,.72), transparent); }
.gallery-thumbs { display: grid; grid-template-columns: repeat(auto-fill, minmax(88px, 1fr)); gap: 10px; margin-top: 16px; }
.gallery-thumb { padding: 0; border: 2px solid transparent; border-radius: 9px; overflow: hidden; cursor: pointer; background: var(--bg3); line-height: 0; transition: border-color .2s, transform .2s, box-shadow .2s; }
.gallery-thumb img { width: 100%; aspect-ratio: 16/9; object-fit: cover; opacity: .6; transition: opacity .2s; }
.gallery-thumb:hover { transform: translateY(-3px); }
.gallery-thumb:hover img { opacity: .9; }
.gallery-thumb.active { border-color: var(--accent); box-shadow: 0 6px 18px rgba(79,142,247,.4); }
.gallery-thumb.active img { opacity: 1; }

/* 灯箱 */
.lightbox { position: fixed; inset: 0; z-index: 500; background: rgba(6,7,11,.94); backdrop-filter: blur(6px); display: flex; align-items: center; justify-content: center; opacity: 0; pointer-events: none; transition: opacity .3s; padding: 40px; }
.lightbox.open { opacity: 1; pointer-events: auto; }
.lb-img { max-width: 92vw; max-height: 82vh; border-radius: 10px; box-shadow: 0 30px 80px rgba(0,0,0,.7); transform: scale(.96); transition: transform .3s; }
.lightbox.open .lb-img { transform: scale(1); }
.lb-close, .lb-prev, .lb-next { position: absolute; background: rgba(255,255,255,.08); border: 1px solid var(--border); color: #fff; cursor: pointer; border-radius: 50%; display: flex; align-items: center; justify-content: center; transition: background .2s, transform .2s; }
.lb-close { top: 22px; right: 26px; width: 46px; height: 46px; font-size: 1.8rem; }
.lb-prev, .lb-next { top: 50%; transform: translateY(-50%); width: 54px; height: 54px; font-size: 1.4rem; }
.lb-prev { left: 26px; } .lb-next { right: 26px; }
.lb-close:hover, .lb-prev:hover { background: var(--accent); }
.lb-next:hover { background: var(--accent); }
.lb-prev:hover { transform: translateY(-50%) scale(1.08); }
.lb-next:hover { transform: translateY(-50%) scale(1.08); }
.lb-caption { position: absolute; bottom: 24px; left: 0; right: 0; text-align: center; color: var(--text2); font-size: .9rem; }

@media (max-width: 768px) {
  .gallery-thumbs { grid-template-columns: repeat(auto-fill, minmax(66px, 1fr)); }
  .lightbox { padding: 16px; }
  .lb-prev, .lb-next { width: 44px; height: 44px; }
  .lb-prev { left: 10px; } .lb-next { right: 10px; }
}
@media (prefers-reduced-motion: reduce) {
  .gallery-main img, .lb-img { transition: none !important; }
  .gallery-main:hover img { transform: none; }
}