/* ============================================================
   319解说 官网样式
   配色取自品牌头像：深空蓝夜空 + 青绿发光
   零外部依赖，纯手写，Cloudflare Pages 秒开
   ============================================================ */

:root {
  --ink:        #0B1020;   /* 深空蓝底 */
  --ink-2:      #111832;   /* 稍亮一层 */
  --ink-3:      #1A2344;   /* 卡片底 */
  --line:       #232E52;   /* 分割线 */
  --text:       #E8EDF7;   /* 主文字 */
  --text-dim:   #95A3C0;   /* 次要文字 */
  --mint:       #2EE6B0;   /* 品牌青绿 */
  --mint-dim:   #1FA47D;
  --white:      #FFFFFF;

  --radius:     14px;
  --radius-sm:  9px;
  --maxw:       1080px;

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font);
  background: var(--ink);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }

/* ---------------- 导航 ---------------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11, 16, 32, .82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 17px; letter-spacing: .3px;
}
.brand img { border-radius: 8px; }
.nav-links { display: flex; align-items: center; gap: 28px; font-size: 15px; }
.nav-links a { color: var(--text-dim); transition: color .18s; }
.nav-links a:hover { color: var(--mint); }
.nav-cta {
  padding: 8px 18px;
  border: 1px solid var(--mint);
  border-radius: 999px;
  color: var(--mint) !important;
  font-weight: 600;
  transition: all .18s;
}
.nav-cta:hover { background: var(--mint); color: var(--ink) !important; }

/* ---------------- 首屏 ---------------- */
.hero {
  position: relative;
  padding: 96px 0 104px;
  overflow: hidden;
  background:
    radial-gradient(760px 420px at 78% 12%, rgba(46,230,176,.13), transparent 62%),
    radial-gradient(520px 320px at 12% 88%, rgba(46,230,176,.07), transparent 68%);
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.18fr .82fr;
  gap: 56px;
  align-items: center;
}
.badge {
  display: inline-block;
  padding: 6px 14px;
  margin-bottom: 22px;
  font-size: 13px;
  letter-spacing: .6px;
  color: var(--mint);
  background: rgba(46,230,176,.09);
  border: 1px solid rgba(46,230,176,.28);
  border-radius: 999px;
}
.hero h1 {
  font-size: clamp(30px, 4.4vw, 50px);
  line-height: 1.28;
  font-weight: 800;
  letter-spacing: -.5px;
  margin-bottom: 24px;
}
.hero h1 em {
  font-style: normal;
  color: var(--mint);
  position: relative;
  white-space: nowrap;
}
.lead {
  font-size: 17px;
  color: var(--text-dim);
  max-width: 520px;
  margin-bottom: 34px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 34px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 13px 28px;
  border-radius: 999px;
  font-size: 15px; font-weight: 600;
  transition: all .2s;
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--mint); color: #06231A;
  box-shadow: 0 8px 26px -8px rgba(46,230,176,.6);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 32px -8px rgba(46,230,176,.75); }
.btn-ghost {
  border-color: var(--line); color: var(--text-dim);
}
.btn-ghost:hover { border-color: var(--mint); color: var(--mint); }

.hero-points {
  list-style: none;
  display: flex; flex-wrap: wrap; gap: 10px 24px;
  font-size: 14px; color: var(--text-dim);
}
.hero-points li::before {
  content: "✓";
  color: var(--mint);
  margin-right: 7px;
  font-weight: 700;
}

.hero-mark { position: relative; display: grid; place-items: center; }
.hero-mark img {
  position: relative;
  border-radius: 50%;
  width: 100%; max-width: 320px;
  box-shadow: 0 0 0 1px rgba(46,230,176,.22), 0 24px 60px -20px rgba(0,0,0,.8);
}
.glow {
  position: absolute;
  width: 78%; aspect-ratio: 1;
  background: radial-gradient(circle, rgba(46,230,176,.34), transparent 66%);
  filter: blur(46px);
  border-radius: 50%;
}

/* ---------------- 通用区块 ---------------- */
.section { padding: 92px 0; }
.section-dark { background: var(--ink-2); border-block: 1px solid var(--line); }

.section-title {
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 800;
  letter-spacing: -.3px;
  margin-bottom: 12px;
}
.section-sub {
  color: var(--text-dim);
  font-size: 16px;
  margin-bottom: 46px;
}

/* ---------------- 卡片网格 ---------------- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }

.card {
  background: var(--ink-3);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: border-color .2s, transform .2s;
}
.card:hover { border-color: rgba(46,230,176,.42); transform: translateY(-3px); }
.card-num {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--mint);
  letter-spacing: 1.5px;
  margin-bottom: 14px;
}
.card h3 { font-size: 17px; font-weight: 700; margin-bottom: 12px; line-height: 1.5; }
.card p { font-size: 14.5px; color: var(--text-dim); }

/* ---------------- 产品 ---------------- */
.group-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--mint);
  letter-spacing: .5px;
  margin: 40px 0 20px;
}
.group-title:first-of-type { margin-top: 0; }

.prod {
  display: flex; flex-direction: column;
  background: var(--ink-3);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
  transition: border-color .2s, transform .2s;
}
.prod:hover { border-color: rgba(46,230,176,.42); transform: translateY(-3px); }
.prod-paid {
  border-color: rgba(46,230,176,.5);
  background: linear-gradient(160deg, rgba(46,230,176,.07), var(--ink-3) 58%);
}
.prod-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 14px;
}
.tag {
  font-size: 12px; font-weight: 600;
  padding: 4px 11px; border-radius: 999px;
  letter-spacing: .3px;
}
.tag-free { color: var(--text-dim); background: rgba(149,163,192,.13); }
.tag-paid { color: #06231A; background: var(--mint); }
.price {
  font-family: var(--mono);
  font-size: 24px; font-weight: 700; color: var(--mint);
}
.prod h4 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.prod-desc { font-size: 14.5px; color: var(--text-dim); margin-bottom: 16px; flex: 1; }
.prod-list {
  list-style: none; margin-bottom: 18px;
  font-size: 13.5px; color: var(--text-dim);
}
.prod-list li { padding-left: 18px; position: relative; margin-bottom: 7px; }
.prod-list li::before {
  content: "▹"; position: absolute; left: 0; color: var(--mint);
}
.prod-link {
  font-size: 14px; font-weight: 600; color: var(--mint);
  transition: gap .2s;
}
.prod-link:hover { text-decoration: underline; }

/* ---------------- 服务 ---------------- */
.svc {
  background: var(--ink-3);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 26px;
  transition: border-color .2s, transform .2s;
}
.svc:hover { border-color: rgba(46,230,176,.42); transform: translateY(-3px); }
.svc h3 { font-size: 18px; font-weight: 700; margin-bottom: 12px; }
.svc p { font-size: 14.5px; color: var(--text-dim); margin-bottom: 18px; }
.svc-foot {
  font-size: 13px; color: var(--mint);
  padding-top: 16px; border-top: 1px solid var(--line);
}

/* ---------------- 关于 ---------------- */
.about-inner { max-width: 760px; }
.about-p { color: var(--text-dim); margin-bottom: 18px; font-size: 16px; }
.about-p strong { color: var(--mint); font-weight: 600; }
.about-meta {
  display: flex; gap: 48px; flex-wrap: wrap;
  margin-top: 36px; padding-top: 30px;
  border-top: 1px solid var(--line);
}
.about-meta div { display: flex; flex-direction: column; }
.about-meta strong {
  font-size: 28px; font-weight: 800; color: var(--mint);
  line-height: 1.2;
}
.about-meta span { font-size: 13.5px; color: var(--text-dim); }

/* ---------------- 联系 ---------------- */
.contact-inner { max-width: 820px; }
.contact-box {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px;
  margin-bottom: 24px;
}
.contact-item {
  background: var(--ink-3);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 22px 20px;
}
.contact-label {
  font-size: 12.5px; color: var(--mint);
  letter-spacing: .5px; margin-bottom: 8px;
}
.contact-value { font-size: 14.5px; color: var(--text); line-height: 1.6; }
.contact-note { font-size: 12.5px; color: #6B7A99; }

/* ---------------- 页脚 ---------------- */
.footer {
  padding: 44px 0;
  border-top: 1px solid var(--line);
  background: var(--ink);
}
.footer-inner { text-align: center; }
.footer-brand {
  display: inline-flex; align-items: center; gap: 9px;
  font-weight: 700; margin-bottom: 10px;
}
.footer-brand img { border-radius: 6px; }
.footer-copy { font-size: 14px; color: var(--text-dim); margin-bottom: 8px; }
.footer-legal { font-size: 12.5px; color: #5A6785; }

/* ---------------- 响应式 ---------------- */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 44px; }
  .hero-mark { order: -1; }
  .hero-mark img { max-width: 200px; }
  .grid-3, .grid-2, .contact-box { grid-template-columns: 1fr; }
  .about-meta { gap: 32px; }
}

@media (max-width: 640px) {
  .wrap { padding: 0 18px; }
  .nav-links { gap: 16px; font-size: 14px; }
  .nav-links a:not(.nav-cta):not(:last-child) { display: none; }
  .hero { padding: 60px 0 68px; }
  .section { padding: 64px 0; }
  .hero-actions .btn { flex: 1; }
  .hero h1 em { white-space: normal; }
}

/* 减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
  html { scroll-behavior: auto; }
}