/* ==========================================================================
   云点点 · 直播商城源码售卖页 样式
   工程结构：css/style.css · js/main.js · assets/
   ========================================================================== */

/* ---------- Design tokens ---------- */
:root {
  --ink: #0e1b2b;
  --ink-2: #15233a;
  --ink-3: #1d3050;
  --ink-4: #28456e;
  --cyan: #12b5cb;
  --cyan-soft: #0fa3b8;
  --coral: #ff5a4f;
  --coral-deep: #e8483f;
  --amber: #ffb020;
  --paper: #f5f8fb;
  --card: #ffffff;
  --line: #e3eaf2;
  --text: #1b2735;
  --text-2: #5b6b7f;
  --text-3: #93a1b3;
  --radius: 18px;
  --radius-sm: 12px;
  --shadow-soft: 0 14px 40px -22px rgba(14, 27, 43, 0.35);
  --shadow-card: 0 10px 30px -18px rgba(14, 27, 43, 0.28);
  --container: 1200px;
  --font: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

/* ---------- Reset / base ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--text);
  background: var(--paper);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: 72px 0;
}
.section--paper { background: var(--paper); }
.section--white { background: var(--card); }

/* 眉标 + 标题 */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--coral);
  text-transform: uppercase;
  margin-bottom: 14px;
}
.eyebrow::before { content: ""; width: 22px; height: 2px; background: var(--coral); border-radius: 2px; }
.section-title {
  font-size: 28px;
  line-height: 1.3;
  font-weight: 800;
  letter-spacing: 0.5px;
  color: var(--ink);
  max-width: 720px;
}
.section-title .hl { color: var(--coral); }
.section-sub {
  margin-top: 14px;
  color: var(--text-2);
  font-size: 15px;
  max-width: 620px;
}
.section-head { margin-bottom: 40px; }
.section-head.center { text-align: center; }
.section-head.center .eyebrow { justify-content: center; }
.section-head.center .section-title,
.section-head.center .section-sub { margin-left: auto; margin-right: auto; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: none;
  border-radius: 999px;
  padding: 13px 26px;
  font-size: 15px;
  font-weight: 700;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
  min-height: 46px;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px) scale(.99); }
.btn--primary {
  background: linear-gradient(135deg, var(--coral), var(--coral-deep));
  color: #fff;
  box-shadow: 0 12px 26px -12px rgba(255, 90, 79, 0.7);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 16px 30px -12px rgba(255, 90, 79, 0.8); }
.btn--ghost {
  background: transparent;
  color: #eaf6f8;
  border: 1px solid rgba(234, 246, 248, 0.45);
}
.btn--ghost:hover { background: rgba(255, 255, 255, 0.08); }
.btn--light {
  background: #fff;
  color: var(--ink);
  box-shadow: var(--shadow-card);
}
.btn--light:hover { transform: translateY(-2px); }

/* ==========================================================================
   导航栏
   ========================================================================== */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(14, 27, 43, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 66px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 18px;
  color: #fff;
}
.brand__mark {
   height: 40px;
   display: grid;
   color: #fff;
}
.brand__mark img {
   max-height: 40px;

}
.brand__dot { color: var(--amber); }
.nav__links {
  display: none;
  gap: 28px;
  font-size: 14.5px;
  color: rgba(255, 255, 255, 0.82);
}
.nav__links a:hover { color: #fff; }
.nav__cta { display: flex; gap: 12px; }
.nav__btn { min-height: 40px; padding: 9px 20px; font-size: 14px; }

/* 移动端汉堡 */
.nav__burger {
  display: inline-flex;
  flex-direction: column;
  gap: 5px;
  width: 42px; height: 42px;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 10px;
}
.nav__burger span { width: 20px; height: 2px; background: #fff; border-radius: 2px; }
.nav__menu {
  position: fixed;
  inset: 66px 0 auto 0;
  background: var(--ink-2);
  border-bottom: 1px solid rgba(255,255,255,.08);
  padding: 14px 20px 22px;
  display: none;
  flex-direction: column;
  gap: 6px;
}
.nav__menu.open { display: flex; }
.nav__menu a {
  padding: 13px 6px;
  color: rgba(255,255,255,.88);
  font-size: 15px;
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.nav__menu a:last-child { border-bottom: none; }

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(900px 500px at 85% -10%, rgba(18, 181, 203, 0.22), transparent 60%),
    radial-gradient(700px 500px at -5% 110%, rgba(255, 90, 79, 0.18), transparent 60%),
    linear-gradient(160deg, var(--ink) 0%, var(--ink-2) 55%, var(--ink-3) 100%);
  color: #fff;
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(rgba(255,255,255,.06) 1px, transparent 1px);
  background-size: 26px 26px;
  opacity: .5;
}
.hero__grid {
  position: relative;
  z-index: 2;
  display: grid;
  gap: 40px;
  padding: 64px 20px 72px;
  max-width: var(--container);
  margin: 0 auto;
}
.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: #bfeef4;
  background: rgba(18, 181, 203, 0.14);
  border: 1px solid rgba(18, 181, 203, 0.4);
  border-radius: 999px;
  padding: 6px 14px;
  margin-bottom: 22px;
}
.hero__badge .pulse {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 0 rgba(255, 176, 32, 0.6);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(255,176,32,.55); }
  70% { box-shadow: 0 0 0 9px rgba(255,176,32,0); }
  100% { box-shadow: 0 0 0 0 rgba(255,176,32,0); }
}
.hero h1 {
  font-size: 32px;
  line-height: 1.25;
  font-weight: 900;
  letter-spacing: 0.5px;
}
.hero h1 .grad {
  background: linear-gradient(120deg, #7fe6f2, var(--coral));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero__lead {
  margin-top: 20px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 15.5px;
  max-width: 540px;
}
.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}
.hero__points {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 34px;
  max-width: 520px;
}
.hero__points li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.9);
}
.hero__points .tick {
  flex: none;
  width: 20px; height: 20px;
  margin-top: 3px;
  border-radius: 50%;
  background: rgba(18, 181, 203, 0.25);
  display: grid;
  place-items: center;
  color: var(--cyan);
}

.hero__visual {
  position: relative;
  z-index: 2;
  align-self: center;
}
.hero__frame {
  position: relative;
  border-radius: 22px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.16);
  box-shadow: 0 30px 80px -30px rgba(0,0,0,.65);
}
.hero__frame img { width: 100%; height: auto; }
.hero__chip {
  position: absolute;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  padding: 9px 15px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255,255,255,.22);
  backdrop-filter: blur(6px);
  box-shadow: 0 8px 24px -8px rgba(0,0,0,.4);
}
.hero__chip--1 { top: 18px; left: 18px; color: #ffe9c2; }
.hero__chip--2 { bottom: 18px; right: 18px; color: #ffd9d5; }
.hero__chip .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--amber); }
.hero__chip--2 .dot { background: var(--coral); }

/* ==========================================================================
   Stats
   ========================================================================== */
.stats {
  position: relative;
  z-index: 3;
  margin-top: -44px;
}
.stats__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  padding: 26px 22px;
}
.stat { text-align: center; }
.stat + .stat { border-left: 1px solid var(--line); }
.stat__num {
  font-size: 26px;
  font-weight: 800;
  color: var(--ink);
}
.stat__num .u { font-size: 15px; color: var(--coral); font-weight: 700; }
.stat__label { font-size: 12.5px; color: var(--text-2); margin-top: 4px; }

/* ==========================================================================
   Features
   ========================================================================== */
.features__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.feature {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 22px;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.feature:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
  border-color: rgba(18, 181, 203, 0.5);
}
.feature__icon {
  width: 46px; height: 46px;
  border-radius: 13px;
  display: grid;
  place-items: center;
  margin-bottom: 16px;
  color: #fff;
}
.feature__icon--coral { background: linear-gradient(135deg, var(--coral), var(--coral-deep)); }
.feature__icon--cyan { background: linear-gradient(135deg, var(--cyan), var(--cyan-soft)); }
.feature__icon--ink { background: linear-gradient(135deg, var(--ink-3), var(--ink-4)); }
.feature__icon--amber { background: linear-gradient(135deg, var(--amber), #e08a00); }
.feature h3 { font-size: 17px; font-weight: 700; color: var(--ink); margin-bottom: 8px; }
.feature p { font-size: 14px; color: var(--text-2); }

/* ==========================================================================
   产品截图
   ========================================================================== */
.screens__tabs {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 30px;
}
.screen-tab {
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--text-2);
  border-radius: 999px;
  padding: 9px 18px;
  font-size: 14px;
  font-weight: 600;
  transition: all .18s ease;
}
.screen-tab:hover { border-color: var(--cyan); color: var(--ink); }
.screen-tab.active {
  background: linear-gradient(135deg, var(--cyan), var(--ink-4));
  color: #fff;
  border-color: transparent;
}
.screens__panel {
  display: none;
}
.screens__panel.active { display: block; }
.screens__shots {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}
.shot {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}
.shot__img { overflow: hidden; }
.shot__img img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  object-position: top;
  transition: transform .35s ease;
}
.shot:hover .shot__img img { transform: scale(1.03); }
.shot__cap { padding: 16px 18px 18px; }
.shot__cap h4 { font-size: 16px; font-weight: 700; color: var(--ink); }
.shot__cap p { font-size: 13.5px; color: var(--text-2); margin-top: 4px; }

/* ==========================================================================
   技术栈
   ========================================================================== */
.stack__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.stack {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px 22px;
}
.stack__head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.stack__head .tag {
  font-size: 12px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 999px;
}
.tag--front { background: rgba(18,181,203,.12); color: var(--cyan-soft); }
.tag--back { background: rgba(255,90,79,.12); color: var(--coral-deep); }
.tag--deploy { background: rgba(255,176,32,.15); color: #b37400; }
.stack__head h3 { font-size: 17px; font-weight: 700; color: var(--ink); }
.stack ul { display: flex; flex-wrap: wrap; gap: 10px; }
.stack li {
  font-size: 13px;
  color: var(--text-2);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 7px 14px;
}

/* ==========================================================================
   交付内容
   ========================================================================== */
.deliver {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--card);
}
.deliver__list { padding: 10px 22px 22px; }
.deliver__item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 0;
  border-bottom: 1px dashed var(--line);
}
.deliver__item:last-child { border-bottom: none; }
.deliver__icon {
  flex: none;
  width: 34px; height: 34px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: rgba(18,181,203,.12);
  color: var(--cyan-soft);
}
.deliver__item h4 { font-size: 15.5px; font-weight: 700; color: var(--ink); }
.deliver__item p { font-size: 13.5px; color: var(--text-2); margin-top: 2px; }
.deliver__side {
  background: linear-gradient(160deg, var(--ink-2), var(--ink-3));
  color: #fff;
  padding: 30px 26px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.deliver__side h3 { font-size: 19px; font-weight: 800; }
.deliver__side p { font-size: 14px; color: rgba(255,255,255,.78); }
.deliver__promise {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: #d9f6f9;
}
.deliver__promise .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--cyan); }

/* ==========================================================================
   服务流程 (timeline)
   ========================================================================== */
.flow__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}
.flow__grid::before {
  content: "";
  position: absolute;
  left: 19px;
  top: 16px;
  bottom: 16px;
  width: 2px;
  background: linear-gradient(var(--cyan), var(--coral));
  opacity: .35;
  border-radius: 2px;
}
.flow {
  position: relative;
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 18px;
  padding: 14px 0;
}
.flow__dot {
  width: 40px; height: 40px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--card);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-card);
  z-index: 1;
  font-size: 13px;
  font-weight: 800;
  color: var(--cyan-soft);
}
.flow:nth-child(even) .flow__dot { color: var(--coral-deep); }
.flow__body { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px; }
.flow__body h3 { font-size: 16px; font-weight: 700; color: var(--ink); }
.flow__body p { font-size: 13.5px; color: var(--text-2); margin-top: 4px; }

/* ==========================================================================
   定价
   ========================================================================== */
.pricing__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-top: 10px;
}
.plan {
  position: relative;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
}
.plan--pro {
  border: 2px solid var(--coral);
  box-shadow: var(--shadow-soft);
}
.plan__flag {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--coral), var(--coral-deep));
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  padding: 5px 16px;
  border-radius: 999px;
  white-space: nowrap;
}
.plan__name { font-size: 18px; font-weight: 800; color: var(--ink); }
.plan__desc { font-size: 13.5px; color: var(--text-2); margin-top: 4px; }
.plan__price { margin: 22px 0 4px; }
.plan__price .cur { font-size: 16px; font-weight: 700; color: var(--coral); vertical-align: top; }
.plan__price .num { font-size: 44px; font-weight: 900; color: var(--ink); line-height: 1; }
.plan__price .unit { font-size: 13px; color: var(--text-3); }
.plan__tag { font-size: 12px; color: var(--text-3); margin-bottom: 18px; }
.plan ul { margin: 8px 0 22px; display: flex; flex-direction: column; gap: 11px; }
.plan li { display: flex; align-items: flex-start; gap: 9px; font-size: 14px; color: var(--text-2); }
.plan li .tick { flex: none; width: 18px; height: 18px; margin-top: 2px; border-radius: 50%; display: grid; place-items: center; background: rgba(18,181,203,.14); color: var(--cyan-soft); }
.plan li.off { color: var(--text-3); }
.plan li.off .tick { background: rgba(147,161,179,.16); color: var(--text-3); }
.plan .btn { margin-top: auto; }

/* ==========================================================================
   三端一体展示（黑底 · 手机 ×2 + PC 后台）
   ========================================================================== */
.threeside {
  margin-top: 44px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background:
    radial-gradient(600px 320px at 12% 0%, rgba(18, 181, 203, 0.16), transparent 60%),
    radial-gradient(600px 360px at 92% 100%, rgba(255, 90, 79, 0.14), transparent 60%),
    linear-gradient(160deg, var(--ink) 0%, var(--ink-2) 60%, var(--ink-3) 100%);
  color: #fff;
  padding: 34px 22px 30px;
}
.threeside__head { text-align: center; margin-bottom: 26px; }
.threeside__head h3 {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 1px;
  background: linear-gradient(120deg, #7fe6f2, var(--coral));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.threeside__head p { margin-top: 8px; font-size: 13.5px; color: rgba(255, 255, 255, 0.7); }

.threeside__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  align-items: center;
}
.threeside__phones {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  justify-items: center;
}

/* ---------- 设备外壳 ---------- */
.device { margin: 0; }
.device--phone { width: 100%; max-width: 168px; }
.device__screen {
  position: relative;
  border-radius: 20px;
  border: 3px solid #2b3a4f;
  background: #0b1624;
  overflow: hidden;
  aspect-ratio: 9 / 17;
  box-shadow: 0 18px 40px -18px rgba(0, 0, 0, 0.7);
}
.device--phone::before {
  content: "";
  position: absolute;
  top: 6px; left: 50%;
  transform: translateX(-50%);
  width: 42px; height: 5px;
  border-radius: 999px;
  background: #2b3a4f;
  z-index: 3;
}
.device figcaption {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  text-align: center;
}
.device figcaption b { font-size: 14px; font-weight: 700; color: #fff; }
.device figcaption span { font-size: 11.5px; color: rgba(255, 255, 255, 0.6); }

/* ---------- 手机屏幕（观众端） ---------- */
.m { display: flex; flex-direction: column; height: 100%; font-size: 9px; }
.m-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 4px;
  padding: 8px 8px 6px;
  background: rgba(255, 255, 255, 0.05);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.m-live {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  background: var(--coral);
  color: #fff;
  font-weight: 800;
  font-size: 8px;
  padding: 2px 6px;
  border-radius: 999px;
}
.m-live i { width: 4px; height: 4px; border-radius: 50%; background: #fff; }
.m-live--green { background: #1fbf75; }
.m-title { font-weight: 700; color: rgba(255, 255, 255, 0.92); white-space: nowrap; }
.m-viewers { color: rgba(255, 255, 255, 0.55); white-space: nowrap; }

.m-stage {
  position: relative;
  flex: 1;
  background:
    radial-gradient(120px 80px at 30% 30%, rgba(18, 181, 203, 0.35), transparent 70%),
    linear-gradient(150deg, #23324a, #0b1624);
  overflow: hidden;
}
.m-danmu {
  position: absolute;
  right: 6px;
  background: rgba(11, 22, 36, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.92);
  font-size: 8px;
  padding: 2px 6px;
  border-radius: 999px;
}
.m-danmu--1 { top: 14px; }
.m-danmu--2 { top: 34px; }
.m-host {
  position: absolute;
  left: 8px; bottom: 8px;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: rgba(11, 22, 36, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  padding: 3px 8px;
  font-size: 9px;
  color: #fff;
}
.m-avatar {
  width: 14px; height: 14px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--coral), var(--amber));
}

.m-goods {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  padding: 8px;
  background: #0d1a2c;
}
.m-goods__item {
  background: rgba(255, 255, 255, 0.06);
  border-radius: 8px;
  padding: 5px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.m-thumb {
  width: 100%;
  aspect-ratio: 1 / 0.8;
  border-radius: 5px;
  background:
    radial-gradient(30px 24px at 35% 35%, rgba(255, 176, 32, 0.5), transparent 70%),
    linear-gradient(140deg, #2c3f5c, #16233a);
}
.m-goods__meta { display: flex; justify-content: space-between; align-items: center; }
.m-goods__meta b { font-size: 8px; color: rgba(255, 255, 255, 0.85); }
.m-goods__meta i { font-size: 8px; font-style: normal; color: var(--coral); font-weight: 700; }
.m-buy {
  grid-column: 1 / -1;
  border: none;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--coral), var(--coral-deep));
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  padding: 6px 0;
}
.m-tab {
  display: flex;
  justify-content: space-around;
  padding: 7px 4px 8px;
  background: #0d1a2c;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.45);
}
.m-tab .on { color: var(--cyan); font-weight: 700; }

/* ---------- 手机屏幕（主播端） ---------- */
.m--host .m-stage { display: flex; align-items: center; justify-content: center; }
.m-preview { font-size: 9px; color: rgba(255, 255, 255, 0.4); }
.m-gobtn {
  position: absolute;
  bottom: 10px;
  border: none;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--coral), var(--coral-deep));
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  padding: 6px 14px;
}
.m-hostbar {
  display: flex;
  justify-content: space-around;
  padding: 7px 4px;
  background: #0d1a2c;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}
.m-hostbar span { color: rgba(255, 255, 255, 0.75); font-size: 9px; }
.m-data {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  padding: 8px;
  background: #0d1a2c;
}
.m-data div {
  background: rgba(255, 255, 255, 0.06);
  border-radius: 8px;
  text-align: center;
  padding: 7px 0;
}
.m-data b { display: block; font-size: 11px; color: #fff; }
.m-data span { font-size: 8px; color: rgba(255, 255, 255, 0.5); }

/* ---------- PC 后台 ---------- */
.device--pc { width: 100%; }
.device__browser {
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  overflow: hidden;
  background: #0d1a2c;
  box-shadow: 0 24px 60px -24px rgba(0, 0, 0, 0.75);
}
.b-top {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 9px 12px;
  background: #16243a;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.b-dot { width: 9px; height: 9px; border-radius: 50%; }
.b-dot--r { background: #ff5f57; }
.b-dot--y { background: #febc2e; }
.b-dot--g { background: #28c840; }
.b-url {
  margin-left: 10px;
  flex: 1;
  background: rgba(255, 255, 255, 0.07);
  border-radius: 999px;
  color: rgba(255, 255, 255, 0.55);
  font-size: 10px;
  padding: 4px 14px;
}
.b-body { padding: 0; }
.b-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.b-logo { font-size: 12px; font-weight: 800; color: #fff; }
.b-logo::before {
  content: "";
  display: inline-block;
  width: 10px; height: 10px;
  margin-right: 6px;
  border-radius: 4px;
  background: linear-gradient(135deg, var(--cyan), var(--ink-4));
}
.b-nav ul { display: flex; gap: 14px; list-style: none; }
.b-nav li { font-size: 10px; color: rgba(255, 255, 255, 0.55); }
.b-nav li.on { color: var(--cyan); font-weight: 700; }

.b-kpis {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  padding: 14px 14px 8px;
}
.b-kpi {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 10px;
  padding: 10px 12px;
}
.b-kpi b {
  display: block;
  font-size: 16px;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
}
.b-kpi span { font-size: 9px; color: rgba(255, 255, 255, 0.55); }

.b-main {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 12px;
  padding: 10px 14px 16px;
}
.b-chart {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 10px;
  padding: 10px 12px;
}
.b-chart__title { font-size: 10px; font-weight: 700; color: rgba(255, 255, 255, 0.85); margin-bottom: 8px; }
.b-bars {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  height: 74px;
}
.b-bar {
  flex: 1;
  height: var(--h);
  border-radius: 4px 4px 0 0;
  background: linear-gradient(180deg, rgba(18, 181, 203, 0.9), rgba(18, 181, 203, 0.25));
}
.b-bar.on { background: linear-gradient(180deg, var(--coral), rgba(255, 90, 79, 0.35)); }
.b-chart__days {
  display: flex;
  gap: 8px;
  margin-top: 6px;
}
.b-chart__days span { flex: 1; text-align: center; font-size: 8px; color: rgba(255, 255, 255, 0.45); }

.b-live {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 10px;
  padding: 10px 12px;
}
.b-live__title { font-size: 10px; font-weight: 700; color: rgba(255, 255, 255, 0.85); margin-bottom: 8px; }
.b-live__row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 0;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.08);
}
.b-live__row:last-child { border-bottom: none; }
.b-live__ava {
  flex: none;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--coral), var(--amber));
}
.b-live__ava--2 { background: linear-gradient(135deg, var(--cyan), var(--ink-4)); }
.b-live__row b { display: block; font-size: 10px; color: #fff; }
.b-live__row small { font-size: 8px; color: rgba(255, 255, 255, 0.5); }
.b-live__tag {
  margin-left: auto;
  font-style: normal;
  font-size: 8px;
  color: var(--coral);
  border: 1px solid rgba(255, 90, 79, 0.5);
  padding: 1px 5px;
  border-radius: 999px;
}
.b-live__tag--2 { color: var(--cyan); border-color: rgba(18, 181, 203, 0.5); }

/* ---------- 三端一体 · 响应式 ---------- */
@media (min-width: 640px) {
  .threeside__head h3 { font-size: 26px; }
}
@media (min-width: 1024px) {
  .threeside { padding: 40px 36px 34px; }
  .threeside__grid {
    grid-template-columns: 0.95fr 1.05fr;
    gap: 34px;
  }
  .device--phone { max-width: 176px; }
  .b-kpi b { font-size: 18px; }
}

/* ==========================================================================
   页面特效（滚动入场动画）
   CSS 只负责初始隐藏（opacity:0 + transform，均 !important），
   transition 全部由 JS 内联控制，动画完成后清掉，恢复组件自身 transition 行为。
   ========================================================================== */

[data-aos="fade-up"] {
  opacity: 0 !important;
  transform: translateY(60px) !important;
}

[data-aos="fade-left"] {
  opacity: 0 !important;
  transform: translateX(-50px) !important;
}

[data-aos="fade-right"] {
  opacity: 0 !important;
  transform: translateX(50px) !important;
}

[data-aos="zoom-in"] {
  opacity: 0 !important;
  transform: scale(0.9) !important;
}

/* 窄屏：左右滑入退化为上滑 */
@media (max-width: 767px) {
  [data-aos="fade-left"],
  [data-aos="fade-right"] {
    transform: translateY(40px) !important;
  }
}

/* ---------- Hero 光点粒子 ---------- */
.hero__fx {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}
@media (prefers-reduced-motion: reduce) {
  .hero__fx { display: none; }
}

/* ---------- 返回顶部 ---------- */
.back-top {
  position: fixed;
  right: 20px;
  bottom: 88px;
  z-index: 80;
  width: 46px; height: 46px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.22);
  background: rgba(14, 27, 43, 0.78);
  color: #fff;
  display: grid;
  place-items: center;
  box-shadow: 0 10px 26px -12px rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity .25s ease, transform .25s ease, visibility .25s ease;
}
.back-top:hover { background: rgba(14, 27, 43, 0.95); }
.back-top.show { opacity: 1; visibility: visible; transform: none; }
@media (min-width: 1024px) {
  .back-top { bottom: 30px; }
}

/* ---------- 导航滚动高亮 ---------- */
.nav__links a { position: relative; transition: color .2s ease; }
.nav__links a.active { color: #7fe6f2; }
.nav__links a.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0;
  bottom: -6px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--coral));
}

/* ==========================================================================
   FAQ
   ========================================================================== */
.faq__list { max-width: 820px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.faq__q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  text-align: left;
  background: none;
  border: none;
  padding: 18px 20px;
  font-size: 15.5px;
  font-weight: 700;
  color: var(--ink);
}
.faq__q .arrow {
  flex: none;
  transition: transform .25s ease;
  color: var(--coral);
}
.faq.open .faq__q .arrow { transform: rotate(180deg); }
.faq__a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease;
}
.faq__a-inner { padding: 0 20px 18px; font-size: 14px; color: var(--text-2); }

/* ==========================================================================
   CTA band
   ========================================================================== */
.cta-band {
  background:
    radial-gradient(700px 400px at 10% 0%, rgba(18,181,203,.22), transparent 60%),
    radial-gradient(700px 400px at 90% 100%, rgba(255,90,79,.2), transparent 60%),
    linear-gradient(160deg, var(--ink-2), var(--ink-3));
  color: #fff;
  padding: 56px 20px;
}
.cta-band__grid {
  max-width: 1120px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: center;
}
.cta-band__left h2 { font-size: 24px; font-weight: 800; line-height: 1.35; max-width: 560px; }
.cta-band__left p { margin: 16px 0 26px; max-width: 560px; color: rgba(255,255,255,.78); font-size: 14.5px; line-height: 1.7; }
.cta-band__btns { display: flex; flex-wrap: wrap; gap: 14px; justify-content: flex-start; }
.cta-band__time {
  margin: 20px 0 0;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255,255,255,.65);
}
.cta-band__right {
  display: flex;
  align-items: center;
  gap: 20px;
  justify-content: center;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 16px;
  padding: 24px 22px;
}
.cta-band__qrcode {
  flex: none;
  width: 132px;
  height: 132px;
  border: 2px dashed rgba(255,255,255,.4);
  border-radius: 12px;
  display: grid;
  place-items: center;
  text-align: center;
  font-size: 12px;
  line-height: 1.6;
  color: rgba(255,255,255,.6);
  padding-top:6px;
}
.cta-band__qrtext { display: flex; flex-direction: column; gap: 8px; }
.cta-band__qrtext b { font-size: 15px; font-weight: 700; color: #fff; }
.cta-band__qrtext span { font-size: 12.5px; color: rgba(255,255,255,.72); }
.cta-band__qrtext .cta-band__wx { color: var(--coral); font-weight: 600; }
@media (min-width: 900px) {
  .cta-band__grid { grid-template-columns: 1.45fr 1fr; gap: 44px; }
  .cta-band__left h2 { font-size: 30px; }
  .cta-band__right { justify-content: flex-start; }
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer { background: var(--ink); color: rgba(255,255,255,.72); padding: 44px 0 100px; }
.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}
.footer__brand p { font-size: 13.5px; margin-top: 12px; max-width: 320px; color: rgba(255,255,255,.6); }
.footer__col h4 { font-size: 14px; font-weight: 700; color: #fff; margin-bottom: 14px; }
.footer__col ul { display: flex; flex-direction: column; gap: 10px; }
.footer__col li { font-size: 13.5px; }
.footer__col a:hover { color: #fff; }
.footer__bottom {
  margin-top: 34px;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,.1);
  font-size: 12.5px;
  color: rgba(255,255,255,.45);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* 浮动联系条 */
.float-bar {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 90;
  display: flex;
  background: var(--ink);
  border-top: 1px solid rgba(255,255,255,.1);
  box-shadow: 0 -10px 30px -16px rgba(0,0,0,.5);
}
.float-bar a {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 15px 8px;
  font-size: 14px;
  font-weight: 700;
}
.float-bar .fb-tel { color: #fff; border-right: 1px solid rgba(255,255,255,.1); }
.float-bar .fb-call { background: linear-gradient(135deg, var(--coral), var(--coral-deep)); color: #fff; }

/* ==========================================================================
   响应式
   ========================================================================== */
@media (min-width: 640px) {
  .section-title { font-size: 32px; }
  .features__grid { grid-template-columns: repeat(2, 1fr); }
  .stats__grid { grid-template-columns: repeat(4, 1fr); }
  .hero h1 { font-size: 40px; }
  .pricing__grid { grid-template-columns: repeat(3, 1fr); }
  .deliver__list { padding: 10px 28px 22px; }
  .footer__grid { grid-template-columns: repeat(3, 1fr); }
  .footer__bottom { flex-direction: row; justify-content: space-between; }
}

@media (min-width: 768px) {
  .nav__links { display: flex; }
  .nav__burger { display: none; }
  .nav__menu { display: none !important; }
  .hero__grid {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
    gap: 48px;
    padding: 80px 20px 96px;
  }
  .screens__shots { grid-template-columns: repeat(3, 1fr); }
  .screens__shots .shot:first-child .shot__img img { height: 420px; }
  .stack__grid { grid-template-columns: repeat(3, 1fr); }
  .deliver { grid-template-columns: 1.15fr 0.85fr; }
  .flow__grid { grid-template-columns: 1fr; gap: 0; }
  .stats { margin-top: -52px; }
}

@media (min-width: 1024px) {
  .section { padding: 88px 0; }
  .section-title { font-size: 36px; }
  .hero h1 { font-size: 46px; }
  .hero__lead { font-size: 16.5px; }
  .features__grid { grid-template-columns: repeat(3, 1fr); }
  .cta-band h2 { font-size: 32px; }
  .float-bar { display: none; }
  .footer { padding-bottom: 44px; }
}

/* 减少小屏下 hero chips 遮挡 */
@media (max-width: 639px) {
  .hero__chip { font-size: 11.5px; padding: 7px 11px; }
}

/* ==========================================================================
   Swiper 截图轮播（PC 多卡 / 移动单卡 / freeMode 自由滑动）
   ========================================================================== */
.screens__swiper { padding: 0 2px 46px; }
.screen-slide {
  display: flex;
  flex-direction: column;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  height: auto;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.screen-slide:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-soft);
  border-color: rgba(18, 181, 203, 0.5);
}
.screen-slide__img {
  height: 650px;
  overflow: hidden;
  background: var(--paper);
  flex: none;
}
.screen-slide__img img {
  width: 100%;
  object-fit: cover;
  object-position: top center;
  transition: transform .35s ease;
}
.screen-slide:hover .screen-slide__img img { transform: scale(1.04); }
.screen-slide__cap { padding: 15px; }
.screen-slide__cap h4 { font-size: 16px; font-weight: 700; color: var(--ink); }
.screen-slide__cap p { font-size: 13px; color: var(--text-2); margin-top: 4px; }

/* 占位块 */
.screen-placeholder {
  display: grid;
  place-items: center;
  background: repeating-linear-gradient(45deg, #f2f5f9, #f2f5f9 12px, #eaf0f6 12px, #eaf0f6 24px);
}
.screen-placeholder__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: var(--text-3);
  text-align: center;
  padding: 20px;
}
.screen-placeholder__inner span { font-size: 15px; font-weight: 700; color: var(--text-2); }
.screen-placeholder__inner small {
  font-size: 12px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: rgba(14, 27, 43, 0.06);
  border: 1px dashed var(--line);
  padding: 3px 10px;
  border-radius: 6px;
}

/* Swiper 箭头按钮 */
.screens__swiper .swiper-button-prev,
.screens__swiper .swiper-button-next {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: rgba(14, 27, 43, 0.55);
  color: #fff;
  box-shadow: 0 6px 18px -6px rgba(0, 0, 0, 0.4);
  transition: background .18s ease;
}
.screens__swiper .swiper-button-prev { left: 6px; }
.screens__swiper .swiper-button-next { right: 6px; }
.screens__swiper .swiper-button-prev:hover,
.screens__swiper .swiper-button-next:hover { background: rgba(14, 27, 43, 0.82); }
.screens__swiper .swiper-button-prev::after,
.screens__swiper .swiper-button-next::after { font-size: 17px; font-weight: 800; }

/* Swiper 分页指示点 */
.screens__swiper .swiper-pagination {
  position: absolute;
  bottom: 4px;
  left: 0; right: 0;
}
.screens__swiper .swiper-pagination-bullet {
  width: 9px; height: 9px;
  background: var(--line);
  opacity: 1;
  border-radius: 999px;
  transition: width .2s ease, background .2s ease;
}
.screens__swiper .swiper-pagination-bullet-active {
  width: 24px;
  background: linear-gradient(135deg, var(--cyan), var(--ink-4));
}

.screens__hint {
  text-align: center;
  font-size: 12.5px;
  color: var(--text-3);
  margin-top: 16px;
}

@media (min-width: 768px) {
  .screen-slide__img { height: 480px; }
  .screens__swiper .swiper-button-prev,
  .screens__swiper .swiper-button-next { width: 48px; height: 48px; }
}
@media (min-width: 1024px) {
  .screen-slide__img { height: 566px; }
}