:root {
  --bg: #0b0f1a;
  --bg2: #101624;
  --card: #151c2c;
  --line: rgba(255,255,255,.08);
  --text: #eef2f7;
  --muted: #98a2b3;
  --accent: #ff8a1e;
  --accent2: #ffb25e;
}
* { 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", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
}
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }
img { display: block; }

/* ── 导航 ── */
nav {
  position: sticky; top: 0; z-index: 10;
  background: rgba(11,15,26,.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
nav .wrap { display: flex; align-items: center; gap: 12px; height: 60px; }
.logo-img { width: 30px; height: 30px; border-radius: 8px; }
.logo { font-weight: 800; font-size: 17px; letter-spacing: 1px; color: var(--text); text-decoration: none; }
.logo b { color: var(--accent); }
nav .links { margin-left: auto; display: flex; gap: 22px; }
nav .links a { color: var(--muted); text-decoration: none; font-size: 14px; }
nav .links a:hover { color: var(--text); }
nav .links a.active { color: var(--accent2); }

/* ── 首屏 ── */
.hero {
  position: relative;
  padding: 80px 0 76px;
  text-align: center;
  background:
    radial-gradient(640px 320px at 20% 0%, rgba(255,138,30,.15), transparent 70%),
    radial-gradient(640px 320px at 80% 10%, rgba(255,138,30,.09), transparent 70%);
  border-bottom: 1px solid var(--line);
}
.hero .logo-big {
  width: 92px; height: 92px; border-radius: 22px; margin: 0 auto 26px;
  box-shadow: 0 12px 48px rgba(255,138,30,.35), 0 0 0 1px rgba(255,255,255,.12);
}
.hero h1 { font-size: 42px; font-weight: 800; letter-spacing: 2px; line-height: 1.3; }
.hero h1 span { color: var(--accent); }
.hero p.sub { margin: 20px auto 0; max-width: 660px; color: var(--muted); font-size: 17px; }
.hero .cta { margin-top: 34px; display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.hero .tags { margin-top: 30px; color: var(--muted); font-size: 13px; }
.hero .tags span { margin: 0 10px; }

/* ── 产品页 mini 首屏 ── */
.page-hero {
  padding: 64px 0 40px; text-align: center;
  background:
    radial-gradient(640px 320px at 50% 0%, rgba(255,138,30,.13), transparent 70%);
  border-bottom: 1px solid var(--line);
}
.page-hero .badge {
  display: inline-block; font-size: 13px; color: var(--accent2);
  border: 1px solid rgba(255,138,30,.4); border-radius: 999px;
  padding: 3px 16px; margin-bottom: 16px;
}
.page-hero h1 { font-size: 34px; font-weight: 800; letter-spacing: 1px; }
.page-hero p.sub { margin: 12px auto 0; max-width: 620px; color: var(--muted); font-size: 16.5px; }
.page-hero .bigshot {
  max-width: 760px; margin: 36px auto 0;
  border-radius: 14px; overflow: hidden;
  border: 1px solid rgba(255,255,255,.1);
  box-shadow: 0 18px 60px rgba(0,0,0,.5);
}
.page-hero .bigshot img { width: 100%; height: auto; }

/* ── 按钮 ── */
.btn {
  display: inline-block; padding: 12px 30px; border-radius: 10px;
  text-decoration: none; font-size: 15px; font-weight: 600;
  border: 1px solid var(--line);
}
.btn.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #16110a; border: none;
  box-shadow: 0 6px 24px rgba(255,138,30,.35);
}
.btn.ghost { color: var(--text); }
.btn.ghost:hover { border-color: var(--accent); color: var(--accent2); }
.hero .cta { margin-top: 34px; display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.hero .tags { margin-top: 30px; color: var(--muted); font-size: 13px; }
.hero .tags span { margin: 0 10px; }

/* ── 区块 ── */
section { padding: 72px 0; }
section + section { border-top: 1px solid var(--line); }
.sec-title { text-align: center; margin-bottom: 12px; }
.sec-title h2 { font-size: 28px; font-weight: 800; letter-spacing: 1px; }
.sec-title h2 em { font-style: normal; color: var(--accent); }
.sec-title p { color: var(--muted); margin-top: 8px; font-size: 15px; }

/* ── 首页产品速览卡 ── */
.products { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 40px; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 24px 24px 26px;
  transition: transform .2s ease, border-color .2s ease;
  text-decoration: none;
  color: var(--text);
  display: block;
}
.card:hover { transform: translateY(-4px); border-color: rgba(255,138,30,.45); }
.card .badge {
  display: inline-block; font-size: 12px; color: var(--accent2);
  border: 1px solid rgba(255,138,30,.4); border-radius: 999px;
  padding: 2px 12px; margin-bottom: 14px;
}
.card h3 { font-size: 20px; margin-bottom: 2px; }
.card .tag { color: var(--accent2); font-size: 14px; margin-bottom: 16px; font-weight: 600; }
.shot {
  border-radius: 12px; overflow: hidden;
  border: 1px solid rgba(255,255,255,.1);
  box-shadow: 0 10px 34px rgba(0,0,0,.45);
  margin-bottom: 18px;
  background: var(--bg2);
}
.shot img { width: 100%; height: auto; }
.card ul { list-style: none; margin-bottom: 20px; }
.card li {
  padding: 6px 0; color: #c6cdd8; font-size: 14.5px;
  border-bottom: 1px dashed rgba(255,255,255,.06);
}
.card li:last-child { border-bottom: none; }
.card li b { color: var(--text); }
.card .more { color: var(--accent2); font-size: 14.5px; font-weight: 600; text-decoration: none; }
.card .more:hover { color: var(--accent); }

/* ── 功能列表（产品页） ── */
.features { list-style: none; max-width: 780px; margin: 40px auto 0; }
.features li {
  padding: 14px 0; color: #c6cdd8; font-size: 15.5px;
  border-bottom: 1px dashed rgba(255,255,255,.07);
}
.features li b { color: var(--text); }

/* ── 界面预览 ── */
.shots { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; margin-top: 40px; }
.shots figure {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 14px; padding: 12px 12px 14px;
  transition: transform .2s ease, border-color .2s ease;
}
.shots figure:hover { transform: translateY(-3px); border-color: rgba(255,138,30,.4); }
.shots .imgbox {
  border-radius: 10px; overflow: hidden;
  border: 1px solid rgba(255,255,255,.09);
}
.shots img { width: 100%; height: auto; }
.shots figcaption { text-align: center; color: var(--muted); font-size: 13px; padding-top: 12px; }
.shots figcaption b { color: var(--text); }

/* ── 价格 ── */
.pricing-box {
  max-width: 620px; margin: 40px auto 0;
  background: linear-gradient(160deg, #1a2133, #141a29);
  border: 1px solid rgba(255,138,30,.35);
  border-radius: 18px;
  padding: 40px 36px;
  text-align: center;
  box-shadow: 0 10px 50px rgba(255,138,30,.10);
}
.pricing-box .label {
  display: inline-block; background: rgba(255,138,30,.15);
  color: var(--accent2); font-size: 13px; font-weight: 700;
  padding: 4px 16px; border-radius: 999px; margin-bottom: 18px;
}
.price-line { font-size: 46px; font-weight: 800; color: var(--accent); }
.price-line small { font-size: 18px; color: var(--text); font-weight: 600; }
.price-old { color: var(--muted); text-decoration: line-through; margin-left: 10px; font-size: 18px; }
.price-note { color: var(--muted); font-size: 14px; margin-top: 10px; }
.price-include {
  margin-top: 22px; padding-top: 20px; border-top: 1px dashed rgba(255,255,255,.12);
  color: #c6cdd8; font-size: 14.5px;
}

/* ── 下载 ── */
.dl-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 40px; }
.dl-card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 16px; padding: 30px; text-align: center;
}
.dl-card h3 { font-size: 18px; margin-bottom: 6px; }
.dl-card p { color: var(--muted); font-size: 13.5px; margin-bottom: 20px; }
.dl-card .btn { width: 100%; text-align: center; }
.dl-card.wide { grid-column: 1 / -1; }
.dl-card.center { max-width: 480px; margin-left: auto; margin-right: auto; }
.dl-note { text-align: center; color: var(--muted); font-size: 13px; margin-top: 18px; }
.dl-card.solo { max-width: 460px; margin-left: auto; margin-right: auto; }

/* ── 联系 ── */
.contact { display: flex; gap: 46px; align-items: center; justify-content: center; margin-top: 40px; flex-wrap: wrap; }
.contact .info { max-width: 430px; color: var(--muted); font-size: 15px; }
.contact .info b { color: var(--text); font-size: 20px; letter-spacing: 1px; }
.qr {
  width: 168px; border-radius: 14px; overflow: hidden;
  border: 1px solid rgba(255,255,255,.14);
  box-shadow: 0 10px 40px rgba(0,0,0,.4);
}
.qr img { width: 100%; height: auto; }
.qr p { text-align: center; color: var(--muted); font-size: 12px; padding: 8px 0; margin: 0; background: var(--bg2); }

/* ── 页脚 ── */
footer {
  border-top: 1px solid var(--line);
  padding: 30px 0; text-align: center;
  color: var(--muted); font-size: 13px;
}
footer a { color: var(--muted); text-decoration: none; }
footer a:hover { color: var(--text); }
footer .wx { color: var(--muted); }
footer .wx b { color: var(--accent2); }

@media (max-width: 760px) {
  .hero h1 { font-size: 28px; }
  .page-hero h1 { font-size: 26px; }
  .products, .dl-grid, .shots { grid-template-columns: 1fr; }
  .pricing-row { grid-template-columns: 1fr; }
  nav .links { display: none; }
}

/* ── 专业产品（音维 Invo）蓝色系 ── */
.pro-badge {
  color: #7fb2e5;
  border-color: rgba(80,140,200,.5);
  background: rgba(60,110,170,.12);
}
.pro-name { color: #7fb2e5; }
.btn.pro-btn {
  background: linear-gradient(135deg, #2e6db4, #5b9bd8);
  color: #0a1522;
  box-shadow: 0 6px 24px rgba(46,109,180,.35);
}
.btn.pro-btn:hover { filter: brightness(1.1); }
.pro-box {
  border-color: rgba(80,140,200,.4);
  box-shadow: 0 10px 50px rgba(46,109,180,.12);
}
.pro-label {
  background: rgba(80,140,200,.16);
  color: #7fb2e5;
}
.pro-trial { font-size: 30px; font-weight: 800; margin: 6px 0 8px; }
.pro-trial b { color: #7fb2e5; }
.pro-wx { color: #7fb2e5; }

/* ── 首页主打产品卡与三列布局 ── */
.card.featured {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 0 30px;
  align-items: center;
  border-color: rgba(80,140,200,.35);
  background: linear-gradient(160deg, #16202f, #121826);
}
.card.featured:hover { border-color: rgba(80,140,200,.6); }
.card.featured .shot { margin-bottom: 0; grid-row: 1 / 6; grid-column: 2; }
.card.featured h3, .card.featured .tag, .card.featured ul, .card.featured .badge, .card.featured .more { grid-column: 1; }
.card.featured .badge { align-self: start; justify-self: start; }
.card.featured ul { margin-bottom: 16px; }
.pricing-row { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; max-width: 1080px; margin: 40px auto 0; align-items: start; }
.pricing-row .pricing-box { margin: 0; max-width: none; }
.dl-grid.three { grid-template-columns: 1fr 1fr 1fr; }
@media (max-width: 900px) {
  .card.featured { grid-template-columns: 1fr; }
  .card.featured .shot { grid-row: auto; grid-column: 1; margin-bottom: 18px; }
  .dl-grid.three { grid-template-columns: 1fr; }
}
.dl-note code {
  font-family: "SF Mono", Menlo, Consolas, monospace; font-size: 12px;
  background: rgba(255,255,255,.08); border-radius: 4px; padding: 1px 6px;
}
.dl-grid.one { grid-template-columns: 1fr; }
.dl-grid.one .dl-card { max-width: 480px; width: 100%; margin: 0 auto; }

/* ── 音维主页（Invo）补充 ── */
.pro-hero {
  background:
    radial-gradient(640px 320px at 20% 0%, rgba(46,109,180,.18), transparent 70%),
    radial-gradient(640px 320px at 80% 10%, rgba(46,109,180,.10), transparent 70%);
}
.pro-hero h1 span { color: #7fb2e5; }
.pro-kylin {
  border-color: rgba(80,140,200,.45);
  background: linear-gradient(160deg, #16202f, #121a28);
  position: relative;
}
.kylin-tag {
  position: absolute; top: 14px; right: 14px;
  font-size: 12px; font-weight: 700; color: #7fb2e5;
  border: 1px solid rgba(80,140,200,.5);
  background: rgba(60,110,170,.16);
  border-radius: 999px; padding: 2px 12px;
}
.tutorial-link { color: #7fb2e5; text-decoration: none; font-weight: 600; }
.tutorial-link:hover { color: #a8ccf0; text-decoration: underline; }
.shots.single { grid-template-columns: 1fr; max-width: 980px; margin-left: auto; margin-right: auto; }
.price-include .btn { margin-top: 16px; }

/* ── 历史版本页 ── */
.history-link { color: var(--muted); text-decoration: underline; text-underline-offset: 3px; }
.history-link:hover { color: #7fb2e5; }
.ver-block {
  max-width: 860px; margin: 0 auto 28px;
  background: var(--card); border: 1px solid var(--line);
  border-radius: 14px; padding: 26px 30px;
}
.ver-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.ver-head h2 { font-size: 20px; font-weight: 800; letter-spacing: 1px; }
.ver-head .badge { vertical-align: 3px; margin-left: 10px; font-size: 12px; }
.ver-dl { display: flex; gap: 10px; flex-wrap: wrap; }
.ver-dl a {
  color: #7fb2e5; text-decoration: none; font-size: 13.5px; font-weight: 600;
  border: 1px solid rgba(80,140,200,.45); border-radius: 8px; padding: 6px 14px;
  transition: background .15s ease;
}
.ver-dl a:hover { background: rgba(80,140,200,.15); color: #a8ccf0; }
.ver-log { margin-top: 18px; padding-top: 16px; border-top: 1px dashed rgba(255,255,255,.1); }
.ver-log h3 { font-size: 14px; color: var(--muted); font-weight: 700; margin-bottom: 8px; }
.ver-log ol { padding-left: 20px; color: #c6cdd8; font-size: 14px; }
.ver-log li { padding: 4px 0; }
.ver-log li b { color: var(--text); }
@media (max-width: 640px) { .ver-block { padding: 20px 18px; } }

/* ── 导航下拉（直播产品） ── */
.nav-drop {
  position: relative; color: var(--muted); font-size: 14px; cursor: pointer;
}
.nav-drop:hover { color: var(--text); }
.drop-menu {
  display: none; position: absolute; top: calc(100% + 10px); left: 50%;
  transform: translateX(-50%);
  background: var(--card); border: 1px solid var(--line);
  border-radius: 10px; padding: 8px; min-width: 220px;
  box-shadow: 0 12px 40px rgba(0,0,0,.5); z-index: 20;
}
.drop-menu::before { content: ''; position: absolute; top: -12px; left: 0; right: 0; height: 12px; }
.nav-drop:hover .drop-menu { display: flex; flex-direction: column; gap: 2px; }
.drop-menu a {
  color: var(--muted); text-decoration: none; font-size: 13.5px;
  padding: 9px 12px; border-radius: 8px; white-space: nowrap;
}
.drop-menu a:hover { background: rgba(255,255,255,.06); color: var(--accent2); }

/* ── 主题配色叠放 ── */
.theme-stack { display: flex; justify-content: center; align-items: flex-start; margin-top: 48px; padding-bottom: 26px; overflow-x: clip; }
.ts {
  width: 272px; flex-shrink: 0; position: relative;
  background: var(--card); border: 1px solid var(--line);
  border-radius: 12px; padding: 8px 8px 10px;
  box-shadow: 0 10px 34px rgba(0,0,0,.45);
  transition: transform .22s ease;
}
.ts + .ts { margin-left: -148px; }
.ts .imgbox { border-radius: 8px; overflow: hidden; border: 1px solid rgba(255,255,255,.09); }
.ts img { width: 100%; height: auto; display: block; }
.ts figcaption { text-align: center; color: var(--muted); font-size: 13px; padding-top: 8px; }
.ts.s1 { transform: rotate(-7deg)  translateY(30px); z-index: 1; }
.ts.s2 { transform: rotate(-4deg)  translateY(14px); z-index: 2; }
.ts.s3 { transform: rotate(-1.5deg) translateY(4px);  z-index: 3; }
.ts.s4 { transform: translateY(-6px); z-index: 7; border-color: rgba(80,140,200,.5); }
.ts.s5 { transform: rotate(1.5deg)  translateY(4px);  z-index: 4; }
.ts.s6 { transform: rotate(4deg)   translateY(14px); z-index: 3; }
.ts.s7 { transform: rotate(7deg)   translateY(30px); z-index: 2; }
.ts:hover { transform: translateY(-22px) scale(1.05); z-index: 20; }
.ts.s4:hover { transform: translateY(-26px) scale(1.05); }
@media (max-width: 900px) {
  .theme-stack { flex-direction: column; align-items: center; }
  .ts, .ts + .ts { margin-left: 0; transform: none; width: 100%; max-width: 560px; margin-top: -34px; }
  .ts:first-child { margin-top: 0; }
  .ts:hover { transform: translateY(-6px) scale(1.02); }
}