/* ============================================================
   蜡笔投屏产品页（V3.1 设计稿正式实现）
   依据：DESIGN_SYSTEM.md；Token 全部读取 design-tokens.css
   说明：本文件仅在 /products/labicast/ 页面加载。
   所有类名带 lp- 前缀，与全站历史样式完全隔离。
   断点：桌面 >1080px；平板 721–1080px；移动 ≤720px。
   ============================================================ */

/* ---------- 基础 ---------- */
.lp-container { width: min(var(--zk-container), calc(100% - 48px)); margin: 0 auto; }
.lp-section { padding: var(--zk-space-27) 0; }
.lp-section--soft { background: var(--zk-surface); }
.lp-section--blue-soft { background: linear-gradient(180deg, #f4f8ff 0%, #fafcff 100%); }

.lp-eyebrow { display: inline-flex; align-items: center; gap: 9px; color: var(--zk-primary); font-size: 13px; font-weight: 900; letter-spacing: 0.09em; }
.lp-eyebrow::before { content: ""; width: 20px; height: 2px; border-radius: 3px; background: currentColor; }

.lp-section-head { text-align: center; max-width: 1100px; margin: 0 auto 46px; }
.lp-section-head h2 { margin: 13px 0 14px; color: var(--zk-ink); font-size: var(--zk-text-h2); line-height: 1.14; letter-spacing: -0.045em; }
.lp-section-head p { margin: 0 auto; max-width: 800px; color: var(--zk-muted); font-size: 17px; }

/* ---------- 按钮 ---------- */
.lp-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  min-height: 52px; padding: 0 23px; border: 1px solid transparent; border-radius: 14px;
  font: inherit; font-weight: 900; white-space: nowrap; cursor: pointer;
  text-decoration: none; transition: transform var(--zk-motion-base), background var(--zk-motion-base), border-color var(--zk-motion-base);
}
.lp-btn:hover { transform: translateY(-1px); }
.lp-btn--primary { background: var(--zk-primary); color: var(--zk-white); box-shadow: 0 13px 30px rgba(46, 103, 248, 0.24); }
.lp-btn--primary:hover { background: var(--zk-primary-hover); }
.lp-btn--secondary { background: var(--zk-white); color: var(--zk-ink); border-color: var(--zk-line-strong); }
.lp-btn--ghost { background: var(--zk-primary-soft); color: var(--zk-primary); }
.lp-btn--text { min-height: auto; padding: 0; border: 0; background: transparent; color: var(--zk-primary); }
.lp-btn--disabled, .lp-btn[disabled] { background: #eef1f5; color: #9ba5b5; box-shadow: none; cursor: not-allowed; }
.lp-btn--disabled:hover, .lp-btn[disabled]:hover { transform: none; }
.lp-btn:focus-visible, .lp-device-tab:focus-visible, .lp-feature-tab:focus-visible, .lp-faq-q:focus-visible, .lp-guide-card:focus-visible {
  outline: 2px solid var(--zk-primary); outline-offset: 2px;
}

/* ---------- 标签 ---------- */
.lp-pill { display: inline-flex; align-items: center; gap: 7px; padding: 7px 11px; border-radius: var(--zk-radius-pill); font-size: 12px; font-weight: 900; white-space: nowrap; }
.lp-pill--green { background: var(--zk-success-soft); color: #16855a; }
.lp-pill--blue { background: var(--zk-primary-soft); color: var(--zk-primary); }
.lp-pill--gray { background: #f0f2f6; color: #7e899b; }

/* ---------- 模块 01：首屏 ---------- */
.lp-hero {
  position: relative; overflow: hidden; padding: 66px 0 0;
  background: radial-gradient(circle at 86% 8%, rgba(80, 139, 255, 0.14), transparent 34%), linear-gradient(180deg, #fbfdff 0%, #f5f8ff 100%);
}
.lp-hero::before {
  content: ""; position: absolute; left: -180px; top: 100px; width: 420px; height: 420px;
  border-radius: 50%; background: rgba(75, 132, 255, 0.08); filter: blur(80px);
}
.lp-hero-layout { position: relative; z-index: 2; display: grid; grid-template-columns: minmax(390px, .86fr) minmax(0, 1.14fr); align-items: center; gap: clamp(44px, 6vw, 84px); }
.lp-hero-copy { text-align: left; position: relative; z-index: 2; }
.lp-hero-brand { display: inline-flex; align-items: center; gap: 11px; margin-bottom: 22px; color: #315f9d; font-size: 14px; font-weight: 850; }
.lp-hero-brand img { width: 44px; height: 44px; border-radius: 13px; box-shadow: 0 10px 24px rgba(46, 103, 248, .16); }
.lp-product-lockup {
  display: inline-flex; align-items: center; gap: 11px; margin-bottom: 20px; padding: 7px 12px 7px 7px;
  border: 1px solid rgba(46, 103, 248, 0.14); border-radius: 16px; background: rgba(255, 255, 255, 0.78);
}
.lp-product-lockup img { width: 38px; height: 38px; border-radius: 11px; }
.lp-product-lockup strong { display: block; color: var(--zk-ink); font-size: 16px; }
.lp-product-lockup span { display: block; color: var(--zk-muted); font-size: 11px; }
.lp-hero-title {
  margin: 0; max-width: 620px; color: var(--zk-ink);
  font-size: clamp(52px, 4.8vw, 70px); line-height: 1.06; letter-spacing: -0.055em;
}
.lp-hero-title-part { display: inline-block; }
.lp-hero-lead { max-width: 560px; margin: 20px 0 0; color: #5c6980; font-size: 18px; line-height: 1.7; }
.lp-hero-identity { max-width: 620px; margin: 10px 0 0; color: #7b8799; font-size: 13px; line-height: 1.7; }
.lp-hero-badges { display: flex; justify-content: center; gap: 10px; flex-wrap: wrap; margin-top: 21px; }
.lp-hero-actions { display: flex; justify-content: flex-start; align-items: center; gap: 12px; flex-wrap: wrap; margin-top: 28px; }
.lp-hero-proof { margin: 18px 0 0; color: #7b8799; font-size: 13px; font-weight: 700; }
.lp-detected { width: 100%; margin: 0; color: var(--zk-muted); font-size: 13px; }
.lp-detected strong { color: var(--zk-ink); }
.lp-hero-stage {
  position: relative; z-index: 2; display: block; overflow: hidden; width: 100%; margin: 0;
  border: 1px solid rgba(209, 219, 235, 0.86); border-radius: 28px;
  background: #eef5ff; box-shadow: 0 24px 64px rgba(31, 69, 118, 0.12);
}
.lp-hero-stage img { display: block; width: 100%; height: auto; }
.lp-hero-platforms { position: relative; z-index: 3; display: flex; align-items: center; justify-content: center; gap: 8px; margin-top: 48px; padding: 14px 18px; border: 1px solid var(--zk-line); border-bottom: 0; border-radius: 20px 20px 0 0; background: rgba(255,255,255,.88); box-shadow: 0 -8px 30px rgba(31,69,118,.05); }
.lp-hero-platforms a { padding: 8px 15px; border-radius: var(--zk-radius-pill); color: #627087; font-size: 13px; font-weight: 800; text-decoration: none; }
.lp-hero-platforms a:hover { background: var(--zk-primary-soft); color: var(--zk-primary); }
.lp-hero-platforms a:last-child { margin-left: 8px; color: var(--zk-primary); }
.lp-hero-facts { position: relative; z-index: 2; display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; width: min(100%, 980px); margin: 28px auto 0; }
.lp-fact { display: flex; align-items: center; gap: 12px; padding: 14px 16px; border: 1px solid rgba(218, 227, 240, 0.95); border-radius: 16px; background: rgba(255, 255, 255, 0.82); }
.lp-fact-icon { display: grid; place-items: center; flex: none; width: 42px; height: 42px; border-radius: 13px; background: var(--zk-primary-soft); color: var(--zk-primary); }
.lp-fact-icon svg { width: 22px; height: 22px; }
.lp-fact strong { display: block; color: var(--zk-ink); font-size: 14px; }
.lp-fact span { display: block; color: var(--zk-muted); font-size: 12px; }

/* ---------- 模块 02：下载 ---------- */
.lp-download-section { padding: 58px 0 72px; background: linear-gradient(180deg, #f7f9fd 0%, #fff 100%); }
.lp-download-heading { max-width: none; margin-bottom: 20px; text-align: center; }
.lp-download-heading h2 { margin-top: 0; font-size: clamp(34px, 3.3vw, 46px); }
.lp-download-heading .lp-btn { margin-top: 8px; }
.lp-download-shell { width: min(100%, 1120px); margin: 0 auto; overflow: hidden; border: 1px solid var(--zk-line); border-radius: 24px; background: var(--zk-white); box-shadow: 0 16px 46px rgba(31, 69, 118, 0.08); }
.lp-device-tabs {
  display: grid; grid-template-columns: repeat(3, minmax(96px, 1fr)); gap: 4px;
  width: fit-content; margin: 16px auto 0; padding: 4px;
  border: 1px solid var(--zk-line); border-radius: var(--zk-radius-pill); background: #f3f6fa;
}
.lp-device-tab {
  display: flex; align-items: center; justify-content: center; gap: 7px; min-height: 38px; padding: 7px 14px;
  border: 1px solid transparent; border-radius: var(--zk-radius-pill); background: transparent;
  color: #66728a; font: inherit; font-size: 14px; font-weight: 800; cursor: pointer;
  transition: background var(--zk-motion-base), color var(--zk-motion-base), box-shadow var(--zk-motion-base);
}
.lp-device-tab svg { width: 16px; height: 16px; }
.lp-device-tab.is-active { border-color: rgba(46, 103, 248, 0.18); background: var(--zk-white); color: var(--zk-primary); box-shadow: 0 3px 10px rgba(24, 54, 110, 0.10); }
.lp-tab-panel { padding: 22px; display: flex; flex-direction: column; }
.lp-tab-panel[hidden] { display: none; }

.lp-computer-row, .lp-mobile-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.lp-platform-logo {
  display: grid; place-items: center; flex: none; width: 46px; height: 46px;
  border-radius: 14px; background: var(--zk-primary-soft); color: var(--zk-primary);
}
.lp-platform-logo svg { width: 24px; height: 24px; }
.lp-download-card { display: flex; flex-direction: column; min-height: 214px; padding: 20px; border: 1px solid var(--zk-line); border-radius: 18px; background: var(--zk-white); }
.lp-download-platform { display: flex; align-items: center; gap: 12px; }
.lp-download-card h4 { margin: 0; color: var(--zk-ink); font-size: 19px; }
.lp-download-facts { display: grid; grid-template-columns: repeat(3, auto); justify-content: start; gap: 8px 20px; margin: 22px 0; }
.lp-download-facts div { min-width: 0; padding-right: 8px; border-right: 1px solid var(--zk-line); }
.lp-download-facts div:last-child { padding-right: 0; border-right: 0; }
.lp-download-facts dd { margin: 4px 0 0; color: var(--zk-ink); font-size: 13px; font-weight: 800; line-height: 1.35; white-space: nowrap; }
.lp-download-facts dt { margin-bottom: 5px; color: var(--zk-muted-2); font-size: 11px; }
.lp-download-card .lp-btn {
  align-self: flex-start; min-width: 132px; min-height: 44px; width: auto; margin-top: auto; padding-inline: 20px;
  border-radius: 12px; font-size: 14px; text-align: center;
}
.lp-download-soon { color: var(--zk-primary); background: var(--zk-white); }
.lp-android-qr-card { border-color: rgba(46, 103, 248, .3); background: #fbfdff; }
.lp-android-qr { display: grid; place-items: center; width: 132px; height: 132px; margin: 0 auto 8px; border: 1px solid #dfe6f1; border-radius: 14px; background: #fff; }
.lp-android-qr img { display: block; width: 124px; height: 124px; }
.lp-android-qr-meta { display: grid; gap: 5px; margin-bottom: 0; text-align: center; }
.lp-android-qr-meta strong { color: var(--zk-ink); font-size: 12px; }
.lp-android-qr-card .lp-btn { width: auto; text-align: center; }
.lp-android-qr-card [hidden] { display: none; }
.lp-tv-channels { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }

/* ---------- 模块 03：核心能力 ---------- */
.lp-feature-heading { max-width: none; }
.lp-feature-heading h2 { white-space: nowrap; font-size: clamp(42px, 4vw, 62px); }
.lp-nowrap { white-space: nowrap; }
.lp-feature-tabs { display: flex; justify-content: center; gap: 10px; flex-wrap: wrap; margin-bottom: 24px; }
.lp-feature-tab {
  padding: 11px 16px; border: 1px solid var(--zk-line); border-radius: var(--zk-radius-pill);
  background: var(--zk-white); color: #5f6c81; font: inherit; font-weight: 900; cursor: pointer;
  transition: background var(--zk-motion-base), color var(--zk-motion-base), border-color var(--zk-motion-base);
}
.lp-feature-tab.is-active { border-color: var(--zk-primary); background: var(--zk-primary); color: var(--zk-white); }
.lp-feature-stage { display: grid; grid-template-columns: 0.75fr 1.25fr; gap: 34px; align-items: stretch; padding: 35px; border: 1px solid var(--zk-line); border-radius: var(--zk-radius-xl); background: var(--zk-white); box-shadow: var(--zk-shadow-md); }
.lp-feature-panel { display: contents; }
.lp-feature-panel[hidden] { display: none; }
.lp-feature-copy { display: flex; flex-direction: column; justify-content: center; padding: 8px; }
.lp-feature-icon { display: grid; place-items: center; width: 54px; height: 54px; border-radius: 17px; background: var(--zk-primary-soft); color: var(--zk-primary); }
.lp-feature-icon svg { width: 27px; height: 27px; }
.lp-feature-copy h3 { margin: 20px 0 12px; color: var(--zk-ink); font-size: var(--zk-text-h3); line-height: 1.18; }
.lp-feature-copy p { margin: 0; color: var(--zk-muted); font-size: 16px; }
.lp-feature-list { display: grid; gap: 11px; margin: 22px 0 0; padding: 0; list-style: none; }
.lp-feature-list li { display: flex; gap: 10px; color: #445168; font-size: 14px; }
.lp-check { display: grid; place-items: center; flex: none; width: 20px; height: 20px; border-radius: 50%; background: var(--zk-success-soft); color: var(--zk-success); font-size: 12px; font-weight: 900; }
.lp-supported { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 22px; }
.lp-supported span { padding: 7px 10px; border-radius: var(--zk-radius-pill); background: #f0f3f7; color: #59667a; font-size: 11px; font-weight: 800; }
.lp-feature-visual { position: relative; min-height: 0; aspect-ratio: 16 / 9; display: grid; place-items: center; overflow: hidden; border-radius: var(--zk-radius-lg); background: #eef3fb; }
.lp-feature-visual picture { display: block; width: 100%; height: 100%; }
.lp-feature-visual img { display: block; width: 100%; height: 100%; object-fit: cover; filter: none; }

/* ---------- 模块 04：电视兼容 ---------- */
.lp-compat-layout { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 42px; align-items: center; }
.lp-compat-options { display: grid; gap: 16px; }
.lp-compat-card { display: grid; grid-template-columns: 58px 1fr; gap: 17px; padding: 23px; border: 1px solid var(--zk-line); border-radius: 22px; background: var(--zk-white); }
.lp-compat-card strong { display: block; color: var(--zk-ink); font-size: 18px; }
.lp-compat-card p { margin: 6px 0 0; color: var(--zk-muted); font-size: 14px; }
.lp-compat-num { display: grid; place-items: center; width: 58px; height: 58px; border-radius: var(--zk-radius-md); background: var(--zk-primary-soft); color: var(--zk-primary); font-size: 21px; font-weight: 900; }
.lp-compat-actions { display: flex; gap: 11px; flex-wrap: wrap; margin-top: 20px; }
.lp-compat-tv { position: relative; }
.lp-compat-tv-frame { position: relative; overflow: hidden; border-radius: 24px; background: #edf3fb; box-shadow: var(--zk-shadow-lg); }
.lp-compat-tv-frame img { display: block; width: 100%; height: auto; }
.lp-compat-caption { position: absolute; left: 20px; bottom: 20px; padding: 9px 12px; border-radius: 11px; background: rgba(255, 255, 255, 0.94); color: var(--zk-ink); font-size: 12px; font-weight: 900; box-shadow: 0 8px 20px rgba(13, 31, 61, 0.12); }

/* ---------- 模块 05：三步开始 ---------- */
.lp-steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.lp-step-card { overflow: hidden; border: 1px solid var(--zk-line); border-radius: 26px; background: var(--zk-white); }
.lp-step-visual { position: relative; height: 270px; display: grid; place-items: center; overflow: hidden; background: var(--zk-surface-2); }
.lp-step-visual img { width: 100%; height: 100%; object-fit: cover; }
.lp-step-visual--contain img { object-fit: contain; padding: 17px; }
.lp-step-body { padding: 24px; }
.lp-step-index { display: inline-grid; place-items: center; width: 32px; height: 32px; border-radius: 10px; background: var(--zk-primary); color: var(--zk-white); font-size: 13px; font-weight: 900; }
.lp-step-body h3 { margin: 15px 0 7px; color: var(--zk-ink); font-size: 21px; }
.lp-step-body p { margin: 0; color: var(--zk-muted); font-size: 14px; }
.lp-step-download-demo { width: 90%; display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.lp-demo-platform { padding: 17px 9px; border: 1px solid #dbe4f1; border-radius: 15px; background: var(--zk-white); text-align: center; box-shadow: var(--zk-shadow-sm); }
.lp-demo-platform i { display: grid; place-items: center; width: 38px; height: 38px; margin: 0 auto 9px; border-radius: 11px; background: var(--zk-primary-soft); color: var(--zk-primary); font-style: normal; }
.lp-demo-platform i svg { width: 19px; height: 19px; }
.lp-demo-platform strong { display: block; color: var(--zk-ink); font-size: 11px; }
.lp-demo-platform span { display: block; margin-top: 9px; padding: 5px; border-radius: 7px; background: var(--zk-primary); color: var(--zk-white); font-size: 9px; font-weight: 900; }

/* ---------- 模块 06：使用场景 ---------- */
.lp-scenario-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.lp-scenario-card { overflow: hidden; border: 1px solid var(--zk-line); border-radius: 28px; background: var(--zk-white); box-shadow: var(--zk-shadow-sm); }
.lp-scenario-media { position: relative; aspect-ratio: 16 / 10; overflow: hidden; }
.lp-scenario-media img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--zk-motion-slow); }
.lp-scenario-card:hover .lp-scenario-media img { transform: scale(1.025); }
.lp-scenario-media::after { content: ""; position: absolute; inset: auto 0 0; height: 44%; background: linear-gradient(transparent, rgba(9, 19, 40, 0.56)); }
.lp-scenario-tag { position: absolute; z-index: 2; left: 20px; bottom: 17px; padding: 7px 10px; border-radius: var(--zk-radius-pill); background: rgba(255, 255, 255, 0.92); color: var(--zk-primary); font-size: 11px; font-weight: 900; }
.lp-scenario-body { padding: 24px 26px 27px; }
.lp-scenario-body h3 { margin: 0 0 8px; color: var(--zk-ink); font-size: var(--zk-text-card-title); }
.lp-scenario-body p { margin: 0; color: var(--zk-muted); font-size: 14px; }

/* ---------- 模块 07：使用体验 ---------- */
.lp-benefit-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin-top: 34px; }
.lp-benefit-item { padding: 25px 26px 27px; border: 1px solid var(--zk-line); border-radius: 20px; background: var(--zk-white); }
.lp-benefit-item > span { color: var(--zk-primary); font-size: 11px; font-weight: 900; letter-spacing: .08em; }
.lp-benefit-item h3 { margin: 18px 0 9px; color: var(--zk-ink); font-size: 22px; }
.lp-benefit-item p { margin: 0; color: var(--zk-muted); font-size: 14px; line-height: 1.7; }
.lp-update-list { display: grid; gap: 12px; }
.lp-update-item { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 21px 22px; border: 1px solid var(--zk-line); border-radius: var(--zk-radius-md); background: var(--zk-white); }
.lp-update-item strong { display: block; color: var(--zk-ink); font-size: 15px; }
.lp-update-item span { display: block; margin-top: 4px; color: var(--zk-muted); font-size: 12px; }
.lp-update-item time { color: #8a94a6; font-size: 12px; white-space: nowrap; }
.lp-updates-more { margin-top: 15px; text-align: right; }

/* ---------- 模块 08：教程与 FAQ ---------- */
.lp-help-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; align-items: stretch; }
.lp-help-panel { padding: 29px; border: 1px solid var(--zk-line); border-radius: 28px; background: var(--zk-white); }
.lp-help-panel-head { display: flex; align-items: center; justify-content: space-between; gap: 15px; margin-bottom: 18px; }
.lp-help-panel h3 { margin: 0; color: var(--zk-ink); font-size: 27px; }
.lp-guide-list { display: grid; gap: 12px; }
.lp-guide-card { display: flex; align-items: center; gap: 15px; padding: 17px; border: 1px solid var(--zk-line); border-radius: 17px; background: var(--zk-white); text-decoration: none; transition: border-color var(--zk-motion-base), transform var(--zk-motion-base); }
.lp-guide-card:hover { border-color: #a8bdf1; transform: translateX(2px); }
.lp-guide-icon { display: grid; place-items: center; flex: none; width: 45px; height: 45px; border-radius: 13px; background: var(--zk-primary-soft); color: var(--zk-primary); }
.lp-guide-icon svg { width: 22px; height: 22px; }
.lp-guide-card strong { display: block; color: var(--zk-ink); font-size: 14px; }
.lp-guide-card span { display: block; margin-top: 3px; color: var(--zk-muted); font-size: 12px; }
.lp-faq-list { border-top: 1px solid var(--zk-line); }
.lp-faq-item { border-bottom: 1px solid var(--zk-line); }
.lp-faq-q { width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 18px 0; border: 0; background: transparent; color: var(--zk-ink); font: inherit; font-weight: 900; text-align: left; cursor: pointer; }
.lp-faq-q b { color: var(--zk-primary); font-size: 21px; font-weight: 400; transition: transform var(--zk-motion-base); }
.lp-faq-a { padding: 0 30px 17px 0; color: var(--zk-muted); font-size: 13px; }
.lp-faq-a[hidden] { display: none; }
.lp-faq-item.is-open .lp-faq-q b { transform: rotate(45deg); }

/* ---------- 吸底下载栏 ---------- */
.lp-sticky-bar {
  position: fixed; left: 50%; bottom: 18px; z-index: var(--zk-z-sticky-bar);
  transform: translate(-50%, 120px); opacity: 0;
  display: none; align-items: center; gap: 14px; padding: 10px 12px 10px 14px;
  border: 1px solid rgba(215, 224, 238, 0.95); border-radius: 17px;
  background: rgba(255, 255, 255, 0.95); backdrop-filter: blur(17px);
  box-shadow: 0 20px 60px rgba(23, 47, 93, 0.22);
  transition: transform var(--zk-motion-slow), opacity var(--zk-motion-slow);
}
.lp-sticky-bar.is-visible { transform: translate(-50%, 0); opacity: 1; }
.lp-sticky-bar.is-parked { transform: translate(-50%, 120px); opacity: 0; }
.lp-sticky-product { display: flex; align-items: center; gap: 10px; min-width: 220px; }
.lp-sticky-product img { width: 39px; height: 39px; border-radius: 11px; }
.lp-sticky-product strong { display: block; color: var(--zk-ink); font-size: 13px; }
.lp-sticky-product span { display: block; color: var(--zk-muted); font-size: 11px; }

/* ---------- 平板端 ---------- */
@media (max-width: 1080px) {
  .lp-hero-layout { grid-template-columns: 1fr; gap: 38px; }
  .lp-hero-copy { text-align: center; }
  .lp-hero-brand { margin-bottom: 17px; }
  .lp-hero-lead { margin-left: auto; margin-right: auto; }
  .lp-hero-identity { margin-left: auto; margin-right: auto; }
  .lp-hero-actions { justify-content: center; }
  .lp-hero-title { white-space: normal; }
  .lp-feature-heading h2 { white-space: normal; }
  .lp-compat-layout, .lp-feature-stage, .lp-status-layout, .lp-help-grid { grid-template-columns: 1fr; }
  .lp-feature-panel { display: grid; grid-template-columns: 1fr; }
  .lp-feature-panel[hidden] { display: none; }
  .lp-computer-row, .lp-mobile-grid { grid-template-columns: repeat(3, minmax(230px, 1fr)); overflow-x: auto; scroll-snap-type: x proximity; padding-bottom: 8px; }
  .lp-computer-row > .lp-download-card, .lp-mobile-grid > .lp-mobile-card { scroll-snap-align: start; }
  .lp-scenario-body h3 { font-size: 23px; }
}

/* ---------- 移动端 ---------- */
@media (max-width: 720px) {
  .lp-container { width: min(100% - 30px, var(--zk-container)); }
  .lp-section { padding: 76px 0; }
  .lp-hero { padding: 38px 0 0; }
  .lp-hero-layout { gap: 30px; }
  .lp-hero-title { font-size: 38px; line-height: 1.14; letter-spacing: -0.04em; max-width: 360px; }
  .lp-hero-lead { font-size: 15px; max-width: 360px; }
  .lp-hero-brand { margin-bottom: 15px; }
  .lp-hero-brand img { width: 38px; height: 38px; }
  .lp-hero-actions { display: grid; grid-template-columns: 1fr 1fr; width: 100%; max-width: 360px; margin-left: auto; margin-right: auto; }
  .lp-hero-actions .lp-btn { min-width: 0; width: 100%; padding-inline: 12px; }
  .lp-hero-proof { text-align: center; }
  .lp-hero-stage { border-radius: 20px; }
  .lp-hero-platforms { justify-content: center; width: 100%; margin-top: 28px; padding: 12px 8px; gap: 2px; overflow: visible; border-radius: 18px 18px 0 0; }
  .lp-hero-platforms a { flex: none; padding: 8px 7px; font-size: 12px; white-space: nowrap; }
  .lp-hero-platforms a:last-child { margin-left: 2px; }
  .lp-download-section { padding: 46px 0 58px; }
  .lp-download-heading { margin-bottom: 16px; }
  .lp-download-heading h2 { font-size: 30px; }
  .lp-section-head { margin-bottom: 34px; }
  .lp-section-head h2 { font-size: 34px; white-space: normal; text-wrap: balance; }
  .lp-section-head p { font-size: 15px; }
  .lp-device-tabs { grid-template-columns: repeat(3, minmax(0, 1fr)); width: calc(100% - 20px); margin-top: 10px; }
  .lp-device-tab { min-height: 36px; padding: 6px 8px; font-size: 13px; }
  .lp-device-tab svg { width: 15px; height: 15px; }
  .lp-tab-panel { padding: 12px; }
  .lp-computer-row, .lp-mobile-grid, .lp-tv-channels { grid-template-columns: 1fr; gap: 10px; overflow: visible; padding-bottom: 0; }
  .lp-download-card { min-height: 204px; padding: 18px; }
  .lp-download-card .lp-btn, .lp-android-qr-card .lp-btn { align-self: stretch; width: 100%; }
  .lp-download-facts { margin: 18px 0; }
  .lp-android-qr { width: 124px; height: 124px; }
  .lp-android-qr img { width: 116px; height: 116px; }
  .lp-feature-tabs { justify-content: flex-start; flex-wrap: nowrap; overflow-x: auto; padding-bottom: 4px; }
  .lp-feature-tab { flex: none; }
  .lp-feature-stage { padding: 20px; }
  .lp-feature-copy h3 { font-size: 26px; }
  .lp-feature-visual { min-height: 0; }
  .lp-feature-visual img { width: 100%; height: 100%; }
  .lp-compat-layout { gap: 28px; }
  .lp-steps-grid, .lp-scenario-grid { grid-template-columns: 1fr; }
  .lp-step-visual { height: 240px; }
  .lp-scenario-body h3 { font-size: 23px; }
  .lp-benefit-grid { grid-template-columns: 1fr; gap: 12px; margin-top: 26px; }
  .lp-benefit-item { padding: 22px; }
  .lp-update-item { align-items: flex-start; flex-direction: column; }
  .lp-help-panel { padding: 22px; }
  .lp-sticky-bar { left: 15px; right: 15px; bottom: 10px; transform: translateY(120px); width: auto; justify-content: space-between; }
  .lp-sticky-bar.is-visible { transform: translateY(0); }
  .lp-sticky-bar.is-parked { transform: translateY(120px); }
  .lp-sticky-product { min-width: 0; }
  .lp-sticky-bar .lp-btn--secondary { display: none; }
}

/* ---------- 桌面端标题单行（按 AGENTS.md 标题换行约束） ---------- */
@media (min-width: 1080px) {
  .lp-section-head h2, .lp-hero-title { white-space: nowrap; }
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .lp-btn, .lp-device-tab, .lp-feature-tab, .lp-faq-q b, .lp-guide-card, .lp-scenario-media img, .lp-sticky-bar { transition: none; }
  .lp-scenario-card:hover .lp-scenario-media img { transform: none; }
  .lp-btn:hover { transform: none; }
}