/* 通用骨架：变量由各站 style.css 覆盖 */
:root {
  --ink: #1b1b24;
  --text: #3d3d4c;
  --mute: #74747f;
  --line: #e6e6ee;
  --paper: #f7f7fb;
  --white: #ffffff;
  --pri: #3b6ef5;
  --pri-deep: #2b55c8;
  --accent: #ff8a3d;
  --soft: #eef3ff;
  --soft-2: #fff4ea;
  --shadow: 0 20px 48px rgba(20, 20, 40, 0.09);
  --header: 74px;
  --w: 1200px;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header); }
body {
  margin: 0;
  min-width: 320px;
  padding-top: var(--header);
  color: var(--text);
  background: var(--paper);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; border: 0; background: none; cursor: pointer; }
img { display: block; max-width: 100%; height: auto; }
ul, ol, p, h1, h2, h3, figure, dl, dd, dt { margin: 0; padding: 0; }
ul, ol { list-style: none; }
:focus-visible { outline: 3px solid color-mix(in srgb, var(--pri) 38%, transparent); outline-offset: 3px; }

.wrap { width: min(var(--w), calc(100% - 48px)); margin-inline: auto; }

/* 顶栏 */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  height: var(--header);
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}
.header-inner { height: 100%; display: flex; align-items: center; gap: 30px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); min-width: 150px; }
.brand img { width: 40px; height: 40px; border-radius: 11px; }
.brand strong { display: block; font-size: 18px; font-weight: 900; letter-spacing: -0.01em; line-height: 1.1; }
.brand small { display: block; margin-top: 2px; font-size: 11px; color: var(--mute); font-weight: 600; }
.nav { display: flex; align-items: center; gap: 24px; margin-left: auto; font-size: 14px; font-weight: 600; color: var(--text); }
.nav a:hover { color: var(--pri); }
.header-cta {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 42px; padding: 0 16px; border-radius: 10px;
  background: var(--ink); color: #fff; font-size: 13px; font-weight: 700;
}
.menu-btn { display: none; width: 42px; height: 42px; border-radius: 10px; border: 1px solid var(--line); background: var(--white); place-items: center; }

/* 英雄区 */
.hero { position: relative; padding: 56px 0 40px; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; right: -8%; top: -20%; width: 58%; height: 120%;
  background:
    radial-gradient(circle at 40% 40%, color-mix(in srgb, var(--pri) 16%, transparent), transparent 55%),
    radial-gradient(circle at 70% 70%, color-mix(in srgb, var(--accent) 14%, transparent), transparent 50%);
  pointer-events: none;
}
.hero-grid { position: relative; display: grid; grid-template-columns: 1fr 1.05fr; gap: 48px; align-items: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px; margin-bottom: 16px;
  padding: 6px 12px; border-radius: 999px; background: var(--soft);
  color: var(--pri-deep); font-size: 12px; font-weight: 800;
}
.eyebrow i { width: 6px; height: 6px; border-radius: 50%; background: var(--pri); }
.hero h1 { color: var(--ink); font-size: clamp(44px, 5.6vw, 64px); font-weight: 900; line-height: 1.04; letter-spacing: -0.03em; }
.hero-sub { margin-top: 14px; color: var(--ink); font-size: 22px; font-weight: 700; }
.hero-desc { margin-top: 14px; max-width: 34em; color: var(--mute); font-size: 15px; line-height: 1.85; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-top: 28px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 52px; padding: 0 22px; border-radius: 12px;
  font-size: 15px; font-weight: 800;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { color: #fff; background: var(--pri); box-shadow: 0 14px 30px color-mix(in srgb, var(--pri) 30%, transparent); }
.btn-primary:hover { background: var(--pri-deep); }
.btn-secondary { color: var(--ink); background: var(--white); border: 1px solid var(--line); }
.hero-points { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin-top: 32px; padding-top: 22px; border-top: 1px solid var(--line); }
.hero-points li { font-size: 13px; font-weight: 800; color: var(--ink); line-height: 1.35; }
.hero-points small { display: block; margin-top: 4px; color: var(--mute); font-size: 12px; font-weight: 500; }

.hero-visual { position: relative; min-height: 560px; display: grid; place-items: center; }
.hero-glow {
  position: absolute; width: 84%; aspect-ratio: 1; border-radius: 50%;
  pointer-events: none;
  background: radial-gradient(circle at 50% 45%, color-mix(in srgb, var(--pri) 30%, transparent), color-mix(in srgb, var(--accent) 15%, transparent) 55%, transparent 72%);
}
.stage-phone {
  position: relative; z-index: 2; width: min(258px, 56%); padding: 9px;
  border-radius: 30px; background: #14141d;
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 26px 60px rgba(20, 20, 40, 0.35);
  animation: rise 6.2s ease-in-out infinite;
}
.stage-phone img { width: 100%; height: auto; border-radius: 22px; object-fit: contain; object-position: top center; }
.hero-badge {
  position: absolute; right: 3%; top: 8%; z-index: 3;
  width: 108px; height: 108px; border-radius: 50%;
  display: grid; place-items: center; align-content: center; gap: 2px;
  background: var(--accent); color: #fff; text-align: center; rotate: 8deg;
  box-shadow: 0 16px 34px color-mix(in srgb, var(--accent) 35%, transparent);
}
.hero-badge strong { font-size: 30px; font-weight: 900; line-height: 1; }
.hero-badge span { font-size: 11px; font-weight: 700; letter-spacing: 0.04em; }
.hero-strip {
  position: absolute; left: 0; bottom: 0; z-index: 3;
  display: flex; gap: 8px; padding: 8px 10px; border-radius: 12px;
  background: rgba(255, 255, 255, 0.95); border: 1px solid var(--line);
  box-shadow: 0 12px 26px rgba(20, 20, 40, 0.1);
}
.hero-strip span { padding: 3px 9px; border-radius: 999px; background: var(--soft); color: var(--pri-deep); font-size: 12px; font-weight: 700; }
.hero-float {
  position: absolute; left: 2%; top: 12%; z-index: 3;
  padding: 12px 14px; border-radius: 14px; background: var(--white);
  border: 1px solid var(--line); box-shadow: 0 14px 30px rgba(20, 20, 40, 0.12);
  font-size: 12px; font-weight: 700; color: var(--ink);
}
.hero-float b { display: block; color: var(--pri); font-size: 18px; line-height: 1.2; }
.hero-float small { display: block; margin-top: 2px; color: var(--mute); font-weight: 500; font-size: 11px; }

@keyframes rise { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }

/* 英雄区变体 */
.hv-reverse .hero-grid { direction: rtl; }
.hv-reverse .hero-grid > * { direction: ltr; }
.hv-reverse .hero::before { right: auto; left: -10%; }
.hv-reverse .hero-visual { order: 1; }
.hv-reverse .hero-copy { order: 2; }

.hv-center .hero { padding-top: 44px; }
.hv-center .hero-grid { grid-template-columns: 1fr; justify-items: center; text-align: center; gap: 26px; }
.hv-center .hero-desc { margin-inline: auto; }
.hv-center .hero-actions { justify-content: center; }
.hv-center .hero-points { width: min(680px, 100%); margin-inline: auto; text-align: left; }
.hv-center .hero-visual { min-height: 500px; width: 100%; }
.hv-center .hero-glow { width: min(430px, 72%); }
.hv-center .stage-phone { width: min(230px, 46%); }
.hv-center .hero-badge { left: 12%; right: auto; top: 6%; }
.hv-center .hero-strip { left: auto; right: 8%; bottom: 4%; }

.hv-frame .hero-visual::before {
  content: ""; position: absolute; inset: 5% 6% 8%; border-radius: 26px;
  background: var(--white); border: 1px solid var(--line); box-shadow: var(--shadow);
}
.hv-frame .hero-visual::after {
  content: ""; position: absolute; top: calc(5% + 14px); left: calc(6% + 20px);
  width: 42px; height: 8px; border-radius: 6px;
  background: var(--line); box-shadow: 0 0 0 0 transparent;
}
.hv-frame .stage-phone { width: min(216px, 48%); border-radius: 24px; }
.hv-frame .hero-badge { right: 7%; top: 10%; width: 96px; height: 96px; }
.hv-frame .hero-strip { left: 8%; bottom: 5%; }

.hv-stage .hero-visual::before {
  content: "搜索网址 / 影片"; position: absolute; top: 2%; left: 50%; translate: -50% 0;
  z-index: 4; width: min(360px, 74%); padding: 10px 16px;
  border-radius: 999px; background: var(--white); border: 1px solid var(--line);
  color: var(--mute); font-size: 12px; box-shadow: 0 10px 24px rgba(20, 20, 40, 0.08);
}
.hv-stage .hero-visual { align-content: start; padding-top: 76px; }
.hv-stage .stage-phone { width: min(238px, 52%); }
.hv-stage .hero-badge { left: 2%; right: auto; top: 20%; width: 92px; height: 92px; rotate: -8deg; }
.hv-stage .hero-strip { left: auto; right: 0; bottom: 4%; }

.hv-deck .hero { padding-top: 34px; }
.hv-deck .hero::before { display: none; }
.hv-deck .hero-grid {
  grid-template-columns: 1.02fr 0.98fr; gap: 0; align-items: stretch;
  background: var(--white); border: 1px solid var(--line); border-radius: 26px;
  box-shadow: 0 24px 60px rgba(20, 20, 40, 0.07); overflow: hidden;
}
.hv-deck .hero-copy { padding: 42px 38px 38px 44px; }
.hv-deck .hero-desc { font-size: 14px; line-height: 1.8; }
.hv-deck .hero-points { grid-template-columns: 1fr; gap: 10px; }
.hv-deck .hero-points li { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; padding-bottom: 8px; border-bottom: 1px dashed var(--line); }
.hv-deck .hero-points small { margin-top: 0; }
.hv-deck .hero-visual { min-height: 520px; border-left: 1px solid var(--line); background: linear-gradient(165deg, var(--soft), var(--white) 64%); }
.hv-deck .hero-glow { width: 72%; opacity: 0.75; }
.hv-deck .stage-phone { width: min(222px, 50%); border-radius: 26px; }
.hv-deck .hero-badge { right: 6%; top: 6%; width: 90px; height: 90px; border-radius: 20px; rotate: 0deg; }
.hv-deck .hero-badge strong { font-size: 28px; }
.hv-deck .hero-strip { left: 6%; right: 6%; bottom: 6%; justify-content: center; flex-wrap: wrap; }

.hv-flush .hero-grid { grid-template-columns: 1.04fr 0.96fr; gap: 52px; }
.hv-flush .hero-visual { min-height: 560px; padding-top: 48px; }
.hv-flush .hero-glow { width: 92%; opacity: 0.8; }
.hv-flush .stage-phone {
  width: min(280px, 70%); padding: 0; border-radius: 22px; background: transparent;
  border: 0; box-shadow: 0 28px 64px rgba(20, 20, 40, 0.26); animation: none; rotate: -3deg;
}
.hv-flush .stage-phone img { height: 470px; border-radius: 20px; object-fit: cover; object-position: top center; }
.hv-flush .hero-badge { right: 0; top: 3%; width: 84px; height: 84px; }
.hv-flush .hero-badge strong { font-size: 26px; }
.hv-flush .hero-strip { left: 0; top: 0; bottom: auto; }

/* 入口下载已下线，相关样式不再输出 */

/* 区块头 */
.sec { padding: 72px 0; }
.sec-head { max-width: 40em; margin-bottom: 32px; }
.sec-label { display: inline-block; margin-bottom: 10px; color: var(--pri); font-size: 12px; font-weight: 800; letter-spacing: 0.12em; }
.sec-head h2 { color: var(--ink); font-size: clamp(28px, 3.4vw, 38px); font-weight: 900; line-height: 1.2; letter-spacing: -0.02em; }
.sec-head p { margin-top: 12px; color: var(--mute); font-size: 15px; line-height: 1.8; }

/* 平台核心特色 */
.features { background: var(--paper); }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.feature { padding: 24px; border-radius: 18px; background: var(--white); border: 1px solid var(--line); min-height: 196px; }
.feature em { display: block; margin-bottom: 12px; color: var(--mute); font-style: normal; font-size: 12px; font-weight: 800; letter-spacing: 0.08em; }
.feature h3 { margin-bottom: 10px; color: var(--ink); font-size: 18px; }
.feature p { color: var(--mute); font-size: 13px; line-height: 1.7; }

/* 特色变体 */
.fv-lines .feature-grid { grid-template-columns: 1fr 1fr; gap: 0 44px; }
.fv-lines .feature { min-height: 0; padding: 22px 0 20px; border: 0; border-top: 1px solid var(--line); border-radius: 0; background: transparent; }
.fv-lines .feature em { color: var(--accent); margin-bottom: 8px; }

.fv-split .features .wrap { display: grid; grid-template-columns: 0.78fr 1.22fr; gap: 44px; align-items: start; }
.fv-split .features .sec-head { position: sticky; top: calc(var(--header) + 24px); margin-bottom: 0; }
.fv-split .feature-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
.fv-split .feature { min-height: 0; background: var(--white); border-radius: 14px; }

.fv-bento .feature-grid { grid-template-columns: repeat(3, 1fr); grid-auto-rows: 1fr; }
.fv-bento .feature { min-height: 0; }
.fv-bento .feature:nth-child(1) {
  grid-column: span 2; grid-row: span 2;
  background: var(--ink); border-color: var(--ink); color: #fff;
  display: flex; flex-direction: column; justify-content: flex-end;
  padding: 30px;
}
.fv-bento .feature:nth-child(1) h3 { color: #fff; font-size: 24px; }
.fv-bento .feature:nth-child(1) p { color: rgba(255, 255, 255, 0.72); font-size: 14px; max-width: 32em; }
.fv-bento .feature:nth-child(1) em { color: var(--accent); }
.fv-bento .feature:nth-child(2) { background: var(--soft); border-color: transparent; }

.fv-rows .feature-grid { grid-template-columns: 1fr; gap: 0; }
.fv-rows .feature {
  display: grid; grid-template-columns: 64px 220px 1fr; gap: 20px; align-items: baseline;
  min-height: 0; padding: 20px 0; border: 0; border-top: 1px solid var(--line);
  border-radius: 0; background: transparent;
}
.fv-rows .feature:last-child { border-bottom: 1px solid var(--line); }
.fv-rows .feature em { margin: 0; font-size: 22px; font-weight: 900; color: var(--pri); letter-spacing: 0; }
.fv-rows .feature h3 { margin: 0; }
.fv-rows .feature p { max-width: 46em; }

.fv-index .feature-grid { grid-template-columns: repeat(3, 1fr); gap: 0; border-top: 2px solid var(--ink); }
.fv-index .feature {
  min-height: 0; padding: 24px 24px 26px 0; border: 0; border-bottom: 1px solid var(--line);
  border-radius: 0; background: transparent;
}
.fv-index .feature:nth-child(3n + 2) { padding-left: 24px; border-left: 1px solid var(--line); }
.fv-index .feature:nth-child(3n) { padding-left: 24px; border-left: 1px solid var(--line); }
.fv-index .feature em { color: var(--accent); font-size: 12px; letter-spacing: 0.14em; }
.fv-index .feature h3 { margin: 8px 0 6px; font-size: 18px; }
.fv-index .feature p { font-size: 13px; line-height: 1.75; }

/* 功能与界面展示 */
.showcase { background: var(--white); border-block: 1px solid var(--line); }
.showcase-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 40px; align-items: center; }
.show-list { display: grid; gap: 14px; margin-top: 24px; }
.show-list li { display: grid; grid-template-columns: 28px 1fr; gap: 10px; align-items: start; color: var(--text); font-size: 14px; line-height: 1.65; }
.show-list i { display: grid; place-items: center; width: 24px; height: 24px; margin-top: 1px; border-radius: 8px; background: var(--soft); color: var(--pri); font-style: normal; }
.shot-rail { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; align-items: end; }
.shot { border-radius: 18px; overflow: hidden; border: 1px solid var(--line); background: var(--paper); box-shadow: 0 12px 30px rgba(20, 20, 40, 0.08); }
.shot:nth-child(1) { transform: translateY(-18px); }
.shot:nth-child(3) { transform: translateY(18px); }
.shot img { width: 100%; height: auto; object-fit: contain; object-position: top center; }
.shot figcaption { padding: 10px 12px; color: var(--ink); font-size: 12px; font-weight: 700; background: var(--white); border-top: 1px solid var(--line); }

/* 展示变体 */
.sv-dark .showcase { background: var(--ink); border-block: 0; }
.sv-dark .showcase .sec-head h2 { color: #fff; }
.sv-dark .showcase .sec-head p { color: rgba(255, 255, 255, 0.62); }
.sv-dark .showcase .sec-label { color: var(--accent); }
.sv-dark .show-list li { color: rgba(255, 255, 255, 0.78); }
.sv-dark .show-list i { background: rgba(255, 255, 255, 0.1); color: var(--accent); }
.sv-dark .shot { position: relative; border-color: rgba(255, 255, 255, 0.14); background: #22222d; }
.sv-dark .shot figcaption {
  position: absolute; inset: auto 0 0; padding: 22px 12px 10px; border-top: 0;
  color: #fff; background: linear-gradient(transparent, rgba(0, 0, 0, 0.72));
}
.sv-dark .shot:nth-child(1), .sv-dark .shot:nth-child(3) { transform: none; }

.sv-big .showcase-grid { grid-template-columns: 1fr; }
.sv-big .show-list { grid-template-columns: repeat(3, 1fr); margin-top: 0; margin-bottom: 24px; }
.sv-big .shot-rail { grid-template-columns: 1.6fr 1fr; align-items: stretch; }
.sv-big .shot-rail .shot { transform: none; display: flex; flex-direction: column; }
.sv-big .shot:nth-child(1) { grid-row: span 2; }
.sv-big .shot img { object-fit: cover; flex: 1; }
.sv-big .shot figcaption { border-top: 1px solid var(--line); }

.sv-frames .shot-rail { gap: 18px; align-items: stretch; }
.sv-frames .shot { display: flex; flex-direction: column-reverse; border-radius: 14px; transform: none; }
.sv-frames .shot figcaption { border-top: 0; border-bottom: 1px solid var(--line); background: var(--soft); color: var(--pri-deep); font-size: 11px; }

/* FAQ */
.faq-layout { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 36px; }
.faq-list { display: grid; gap: 0; }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list details:first-child { border-top: 1px solid var(--line); }
.faq-list summary { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 18px 0; cursor: pointer; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary h3 { display: flex; align-items: center; gap: 12px; color: var(--ink); font-size: 16px; font-weight: 800; line-height: 1.4; }
.faq-list summary b { color: var(--pri); font-size: 12px; font-weight: 800; }
.faq-list summary i { display: grid; place-items: center; width: 26px; height: 26px; flex: none; border-radius: 8px; border: 1px solid var(--line); color: var(--pri); font-style: normal; font-weight: 700; transition: transform 0.2s ease; }
.faq-list details[open] summary i { transform: rotate(45deg); }
.faq-list details p { padding: 0 0 20px 32px; color: var(--mute); font-size: 14px; line-height: 1.8; }

/* FAQ 变体 */
.qv-grid .faq-layout { grid-template-columns: 1fr; }
.qv-grid .faq-list { grid-template-columns: 1fr 1fr; gap: 10px; }
.qv-grid .faq-list details, .qv-grid .faq-list details:first-child { border: 1px solid var(--line); border-radius: 14px; background: var(--white); padding: 0 16px; }
.qv-grid .faq-list details p { padding-left: 40px; }
.qv-grid .faq-list summary h3 { font-size: 15px; }

.qv-rail .faq-layout { grid-template-columns: 0.72fr 1.28fr; gap: 48px; }
.qv-rail .faq-layout .sec-head { position: sticky; top: calc(var(--header) + 24px); margin-bottom: 0; }
.qv-rail .faq-list summary h3 b {
  display: grid; place-items: center; width: 30px; height: 30px; flex: none;
  border-radius: 50%; background: var(--accent); color: #fff; font-size: 12px;
}
.qv-rail .faq-list summary { padding: 16px 0; }

/* 用户评价 */
.reviews-layout { display: grid; grid-template-columns: 0.72fr 1.28fr; gap: 40px; }
.reviews-layout .sec-head { margin-bottom: 0; }
.review-wall { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.review { padding: 16px; border-radius: 16px; background: var(--white); border: 1px solid var(--line); }
.review.wide { grid-column: 1 / -1; }
.review.soft { background: var(--soft); border-color: transparent; }
.review header { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.review header > span { width: 34px; height: 34px; border-radius: 11px; display: grid; place-items: center; background: var(--ink); color: #fff; font-size: 13px; font-weight: 800; }
.review strong { display: block; color: var(--ink); font-size: 14px; }
.review time { display: block; margin-top: 2px; color: var(--mute); font-size: 12px; }
.review p { color: var(--text); font-size: 13px; line-height: 1.75; }

/* 评价变体 */
.rv-three .reviews-layout { grid-template-columns: 1fr; }
.rv-three .review-wall { grid-template-columns: repeat(3, 1fr); }
.rv-three .review.wide { grid-column: auto; }
.rv-three .review { position: relative; padding-top: 28px; }
.rv-three .review::before { content: "“"; position: absolute; top: 4px; right: 14px; color: var(--soft-2); font-size: 46px; font-weight: 900; line-height: 1; }
.rv-three .review header > span { background: var(--pri); }

.rv-one .reviews-layout { grid-template-columns: 1fr; }
.rv-one .review-wall { grid-template-columns: 1fr; gap: 10px; }
.rv-one .review, .rv-one .review.wide { grid-column: auto; border-radius: 12px; border-left: 3px solid var(--accent); }
.rv-one .review.soft { background: var(--white); }

.rv-bubble .reviews-layout { grid-template-columns: 1fr; }
.rv-bubble .review { position: relative; border-radius: 16px 16px 16px 4px; }
.rv-bubble .review:nth-child(even) { border-radius: 16px 16px 4px 16px; }
.rv-bubble .review header > span { border-radius: 50%; }

/* 立即下载 */
.download { padding: 20px 0 96px; }
.download-panel {
  display: grid; grid-template-columns: auto 1fr auto; gap: 28px; align-items: center;
  padding: 32px; border-radius: 24px; background: var(--white);
  border: 1px solid var(--line); box-shadow: 0 16px 40px rgba(20, 20, 40, 0.06);
}
.download-panel img { width: 84px; height: 84px; border-radius: 20px; }
.download-panel h2 { color: var(--ink); font-size: clamp(24px, 3vw, 32px); font-weight: 900; margin-bottom: 8px; }
.download-panel p { color: var(--mute); font-size: 14px; line-height: 1.7; }
.download-actions { display: grid; gap: 8px; min-width: 180px; }
.dl-note { color: var(--mute); font-size: 12px; text-align: center; }

/* 下载变体 */
.dv-center .download-panel { grid-template-columns: 1fr; justify-items: center; text-align: center; gap: 14px; background: var(--ink); border-color: var(--ink); }
.dv-center .download-panel h2 { color: #fff; }
.dv-center .download-panel p { color: rgba(255, 255, 255, 0.66); max-width: 46em; }
.dv-center .download-actions { justify-items: center; }
.dv-center .dl-note { color: rgba(255, 255, 255, 0.5); }
.dv-center .download-panel img { width: 64px; height: 64px; border-radius: 16px; }

.dv-split .download-panel { grid-template-columns: auto 1fr; background: linear-gradient(120deg, var(--soft), var(--white)); border-color: var(--soft); }
.dv-split .download-actions { grid-column: 1 / -1; justify-items: start; }
.dv-split .download-actions .btn { min-width: 200px; }
.dv-split .dl-note { text-align: left; }

/* 页脚 */
.site-footer { padding: 36px 0 48px; border-top: 1px solid var(--line); background: var(--white); }
.footer-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 24px; }
.footer-brand { display: inline-flex; align-items: center; gap: 10px; margin-bottom: 10px; color: var(--ink); font-weight: 800; }
.footer-brand img { width: 34px; height: 34px; border-radius: 9px; }
.site-footer p { max-width: 36em; color: var(--mute); font-size: 13px; line-height: 1.7; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 12px 18px; justify-content: flex-end; font-size: 13px; font-weight: 600; color: var(--text); }
.copy { margin-top: 24px; color: var(--mute); font-size: 12px; }

#interaction-complaint-button { color: #1f2430 !important; font-weight: 700; }
#interaction-complaint-button:hover { color: #1f2430 !important; }
.backtop {
  position: fixed; right: 24px; bottom: 150px; z-index: 40;
  width: 44px; height: 44px; border-radius: 12px; background: var(--ink); color: #fff;
  display: grid; place-items: center; opacity: 0; pointer-events: none; transition: opacity 0.2s ease;
}
.backtop.on { opacity: 1; pointer-events: auto; }

.fade { opacity: 0; transform: translateY(14px); transition: opacity 0.5s ease, transform 0.5s ease; }
.fade.in { opacity: 1; transform: none; }

@media (max-width: 980px) {
  .hero-grid, .showcase-grid, .reviews-layout, .faq-layout, .download-panel, .footer-grid, .entry-panel,
  .fv-split .features .wrap, .qv-rail .faq-layout { grid-template-columns: 1fr; }
  .feature-grid, .shot-rail, .review-wall, .qv-grid .faq-list { grid-template-columns: 1fr 1fr; }
  .shot:nth-child(1), .shot:nth-child(3) { transform: none; }
  .hero-visual { min-height: 480px; }
  .nav {
    position: absolute; top: var(--header); left: 0; right: 0; display: none;
    flex-direction: column; align-items: stretch; gap: 0; margin: 0; padding: 10px;
    background: #fff; border-bottom: 1px solid var(--line); box-shadow: var(--shadow);
  }
  .nav.open { display: flex; }
  .nav a { padding: 12px 14px; }
  .menu-btn { display: grid; place-items: center; margin-left: auto; }
  .header-cta { display: none; }
  .site-footer nav { justify-content: flex-start; }
  .download-actions { min-width: 0; }
  .fv-split .features .sec-head, .qv-rail .faq-layout .sec-head { position: static; }
  .fv-bento .feature:nth-child(1) { grid-column: span 2; grid-row: span 2; }
  .rv-three .review-wall { grid-template-columns: 1fr 1fr; }
  .sv-big .shot-rail { grid-template-columns: 1.4fr 1fr; }
  .sv-big .show-list { grid-template-columns: 1fr; }
  .hv-deck .hero-copy { padding: 30px 24px 26px; }
  .hv-deck .hero-grid { grid-template-columns: 1fr; }
  .hv-deck .hero-visual { min-height: 470px; border-left: 0; border-top: 1px solid var(--line); }
  .hv-deck .hero-badge { width: 78px; height: 78px; }
  .hv-flush .stage-phone { width: min(280px, 64%); }
  .hv-flush .hero-grid { grid-template-columns: 1fr; }
  .hv-flush .stage-phone img { height: 430px; }
  .hv-flush .hero-visual { padding-top: 84px; }
}

@media (max-width: 640px) {
  .wrap { width: min(var(--w), calc(100% - 32px)); }
  .feature-grid, .shot-rail, .review-wall, .hero-points, .spec, .qv-grid .faq-list,
  .fv-lines .feature-grid, .fv-split .feature-grid, .rv-three .review-wall,
  .fv-index .feature-grid { grid-template-columns: 1fr; }
  .fv-index .feature, .fv-index .feature:nth-child(3n + 2), .fv-index .feature:nth-child(3n) { padding: 20px 0; border-left: 0; }
  .hv-deck .hero-grid { border-radius: 18px; }
  .hv-deck .hero-copy { padding: 26px 20px 22px; }
  .hv-deck .hero-strip { position: static; margin: 0 20px 20px; justify-content: flex-start; }
  .hv-flush .stage-phone img { height: 420px; }
  .hero { padding: 34px 0 30px; }
  .hero h1 { font-size: clamp(38px, 12vw, 52px); }
  .hero-sub { font-size: 18px; }
  .hero-visual { min-height: 470px; }
  .stage-phone { width: min(222px, 62%); }
  .hero-badge { display: none; }
  .hero-strip { left: 0; bottom: 0; flex-wrap: wrap; max-width: 94%; }
  .hv-reverse .hero-visual { padding-bottom: 78px; }
  .hv-center .hero-badge { left: 2%; }
  .hv-center .hero-strip { right: 0; }
  .hv-frame .hero-visual::before { inset: 2% 0 6%; }
  .hv-stage .hero-visual::before { width: 88%; }
  .hv-stage .hero-visual { padding-top: 56px; }
  .hv-stage .hero-badge { left: -20px; top: 19%; width: 76px; height: 76px; }
  .hv-stage .hero-badge strong { font-size: 20px; }
  .entry-panel { padding: 22px 18px; border-radius: 18px; }
  .feature { min-height: 0; padding: 20px; }
  .faq-list details p { padding-left: 12px; }
  .download-panel { padding: 22px 18px; border-radius: 18px; }
  .download-panel img { width: 64px; height: 64px; border-radius: 16px; }
  .backtop { right: 16px; bottom: 138px; }
  .fv-rows .feature { grid-template-columns: 42px 1fr; gap: 6px 12px; }
  .fv-rows .feature p { grid-column: 2; }
  .fv-bento .feature:nth-child(1) { grid-column: auto; grid-row: auto; padding: 24px; }
  .sv-big .shot-rail { grid-template-columns: 1fr; }
  .sv-big .shot:nth-child(1) { grid-row: auto; }
  .showcase-grid { gap: 24px; }
  .qv-rail .faq-list summary h3 b { width: 26px; height: 26px; }
}