/* 顺剪（ClipFlow）中文站点样式：纯静态，不依赖任何外部字体、脚本或 CDN。 */

:root {
  --bg: #f5f8f7;
  --surface: #ffffff;
  --ink: #0f1b1f;
  --ink-soft: #46565c;
  --ink-mute: #7a8a90;
  --line: #e1e9e7;
  --teal: #0e9f9f;
  --teal-deep: #0b6f78;
  --teal-soft: #e0f4f2;
  --coral: #ff5e50;
  --coral-soft: #ffe9e5;
  --violet: #7a6cf0;
  --violet-soft: #ecebfd;
  --amber: #f0a020;
  --amber-soft: #fff3de;
  --radius: 22px;
  --shadow: 0 18px 50px -24px rgba(11, 60, 66, 0.35);
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", "WenQuanYi Micro Hei",
    "Helvetica Neue", Arial, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img,
video {
  max-width: 100%;
  display: block;
}

a {
  color: var(--teal-deep);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

:focus-visible {
  outline: 3px solid rgba(14, 159, 159, 0.55);
  outline-offset: 3px;
  border-radius: 6px;
}

.container {
  width: min(1120px, 100% - 40px);
  margin-inline: auto;
}

/* ---------- 背景光斑 ---------- */
.glow {
  position: fixed;
  z-index: -1;
  width: 560px;
  height: 560px;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.5;
  pointer-events: none;
}
.glow-a {
  top: -220px;
  left: -160px;
  background: #bdeee9;
}
.glow-b {
  top: 120px;
  right: -220px;
  background: #ffd9d3;
}

/* ---------- 顶部导航 ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(245, 248, 247, 0.82);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid rgba(225, 233, 231, 0.8);
}

.topbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.02em;
}
.brand:hover {
  text-decoration: none;
}
.brand img {
  width: 36px;
  height: 36px;
  border-radius: 9px;
  box-shadow: 0 6px 16px -8px rgba(0, 0, 0, 0.6);
}

.nav {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav a {
  padding: 6px 14px;
  border-radius: 999px;
  color: var(--ink-soft);
  font-size: 15px;
}
.nav a:hover {
  color: var(--ink);
  background: rgba(14, 159, 159, 0.1);
  text-decoration: none;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 50px;
  padding: 0 26px;
  border-radius: 999px;
  font-size: 16px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}
.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}
.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, #0fb0aa, #0b7f88);
  box-shadow: 0 14px 30px -14px rgba(11, 111, 120, 0.8);
}
.btn-ghost {
  color: var(--ink);
  background: var(--surface);
  border-color: var(--line);
}
.btn-ghost:hover {
  background: #fff;
  box-shadow: 0 10px 24px -16px rgba(0, 0, 0, 0.35);
}

/* ---------- Hero ---------- */
.hero {
  padding: 72px 0 56px;
}
.hero .container {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  align-items: center;
  gap: 48px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 20px;
  padding: 6px 14px;
  font-size: 14px;
  color: var(--teal-deep);
  background: var(--teal-soft);
  border-radius: 999px;
}
.eyebrow::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--teal);
}

.hero h1 {
  margin: 0 0 20px;
  font-size: clamp(38px, 6vw, 64px);
  line-height: 1.18;
  letter-spacing: 0.01em;
}
.hero h1 span {
  background: linear-gradient(100deg, var(--teal) 10%, var(--coral) 95%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lede {
  margin: 0 0 28px;
  max-width: 34em;
  font-size: 18px;
  color: var(--ink-soft);
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 32px;
  padding: 0;
  list-style: none;
}
.chips li {
  padding: 6px 14px;
  font-size: 14px;
  color: var(--ink-soft);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
}
.chips li::before {
  content: "✓";
  margin-right: 6px;
  color: var(--teal);
  font-weight: 700;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 演示视频位 ---------- */
.demo {
  position: relative;
  display: flex;
  justify-content: center;
}
.demo::before {
  content: "";
  position: absolute;
  inset: 8% 6%;
  border-radius: 40px;
  background: linear-gradient(150deg, rgba(15, 176, 170, 0.35), rgba(255, 94, 80, 0.3));
  filter: blur(40px);
  z-index: -1;
}

.demo-card {
  position: relative;
  width: min(320px, 78vw);
  aspect-ratio: 45 / 92;
  overflow: visible;
  background: transparent;
  filter: drop-shadow(0 18px 25px rgba(11, 60, 66, 0.2));
}

/* 视频文件缺失或加载失败时显示的占位内容 */
.demo-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 24px;
  text-align: center;
  border-radius: 14% / 6.8%;
  color: #cfe3e3;
  background:
    radial-gradient(120% 60% at 50% 0%, rgba(15, 176, 170, 0.35), transparent 60%),
    radial-gradient(100% 50% at 50% 100%, rgba(255, 94, 80, 0.28), transparent 60%),
    #0b1014;
}
.demo-placeholder img {
  width: 76px;
  height: 76px;
  border-radius: 18px;
}
.demo-placeholder strong {
  font-size: 18px;
  color: #fff;
}
.demo-placeholder span {
  font-size: 13px;
  opacity: 0.75;
}

.demo-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  /* 按 demo.mp4 的实际机壳描边，避免椭圆圆角在四角留下黑边。 */
  -webkit-mask: url("demo-device-mask.svg") center / 100% 100% no-repeat;
  mask: url("demo-device-mask.svg") center / 100% 100% no-repeat;
  opacity: 0;
  transition: opacity 0.3s ease;
}
.demo-card.is-ready .demo-video {
  opacity: 1;
}
.demo-card.is-ready .demo-placeholder {
  display: none;
}

.demo-toggle {
  position: absolute;
  right: 14px;
  bottom: 14px;
  width: 40px;
  height: 40px;
  display: none;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 50%;
  color: #fff;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  cursor: pointer;
  font-size: 14px;
}
.demo-card.is-ready .demo-toggle {
  display: inline-flex;
}

/* ---------- 通用区块 ---------- */
.section {
  padding: 72px 0;
}
.section-head {
  max-width: 640px;
  margin: 0 auto 44px;
  text-align: center;
}
.section-head .kicker {
  margin: 0 0 8px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--teal);
}
.section-head h2 {
  margin: 0 0 12px;
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.3;
}
.section-head p {
  margin: 0;
  color: var(--ink-soft);
}

/* ---------- 亮点 ---------- */
.highlights {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}
.highlight {
  padding: 26px 22px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.highlight .ico {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  margin-bottom: 16px;
  border-radius: 14px;
  font-size: 22px;
}
.highlight h3 {
  margin: 0 0 8px;
  font-size: 18px;
}
.highlight p {
  margin: 0;
  font-size: 15px;
  color: var(--ink-soft);
}
.tone-teal .ico {
  background: var(--teal-soft);
}
.tone-coral .ico {
  background: var(--coral-soft);
}
.tone-violet .ico {
  background: var(--violet-soft);
}
.tone-amber .ico {
  background: var(--amber-soft);
}

/* ---------- 功能分组 ---------- */
.feature-group + .feature-group {
  margin-top: 52px;
}
.group-title {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 20px;
  font-size: 22px;
}
.group-title::before {
  content: "";
  width: 6px;
  height: 24px;
  border-radius: 3px;
  background: var(--tone, var(--teal));
}
.group-title small {
  font-size: 14px;
  font-weight: 400;
  color: var(--ink-mute);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.feature {
  padding: 22px 22px 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.feature:hover {
  transform: translateY(-3px);
  border-color: transparent;
  box-shadow: var(--shadow);
}
.feature h4 {
  margin: 0 0 8px;
  font-size: 17px;
}
.feature p {
  margin: 0;
  font-size: 15px;
  color: var(--ink-soft);
}

.group-teal {
  --tone: var(--teal);
}
.group-coral {
  --tone: var(--coral);
}
.group-violet {
  --tone: var(--violet);
}
.group-amber {
  --tone: var(--amber);
}

/* ---------- 使用流程 ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}
.step {
  position: relative;
  padding: 32px 26px 28px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  counter-increment: step;
}
.step::before {
  content: counter(step);
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  margin-bottom: 16px;
  border-radius: 50%;
  color: #fff;
  font-weight: 700;
  background: linear-gradient(135deg, #0fb0aa, #0b7f88);
}
.step h3 {
  margin: 0 0 8px;
  font-size: 19px;
}
.step p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 15px;
}

/* ---------- 隐私提示 ---------- */
.privacy-band {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  align-items: center;
  gap: 32px;
  padding: 44px;
  color: #e9f6f5;
  background:
    radial-gradient(80% 120% at 0% 0%, rgba(15, 176, 170, 0.4), transparent 60%),
    radial-gradient(70% 100% at 100% 100%, rgba(255, 94, 80, 0.3), transparent 60%),
    #0d1a1f;
  border-radius: 30px;
}
.privacy-band h2 {
  margin: 0 0 12px;
  font-size: clamp(26px, 3.4vw, 34px);
  color: #fff;
}
.privacy-band p {
  margin: 0 0 20px;
  color: #bcd6d6;
}
.privacy-band ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}
.privacy-band li {
  padding: 14px 18px;
  font-size: 15px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
}
.privacy-band .links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.privacy-band .links a {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 0 20px;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 999px;
}
.privacy-band .links a:hover {
  background: rgba(255, 255, 255, 0.12);
  text-decoration: none;
}

/* ---------- 下载 CTA ---------- */
.cta {
  text-align: center;
  padding: 80px 0 96px;
}
.cta img {
  width: 84px;
  height: 84px;
  margin: 0 auto 20px;
  border-radius: 20px;
  box-shadow: var(--shadow);
}
.cta h2 {
  margin: 0 0 12px;
  font-size: clamp(28px, 4vw, 40px);
}
.cta p {
  margin: 0 0 28px;
  color: var(--ink-soft);
}
.cta .cta-row {
  justify-content: center;
}

/* ---------- 页脚 ---------- */
.footer {
  padding: 36px 0 44px;
  font-size: 14px;
  color: var(--ink-mute);
  border-top: 1px solid var(--line);
}
.footer .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
}
.footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}
.footer a {
  color: var(--ink-soft);
}
.footer .beian {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 18px;
  width: 100%;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
}
.footer .beian a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.footer .beian img {
  width: 16px;
  height: 16px;
}

/* ---------- 隐私政策 / 使用条款 ---------- */
.doc-wrap {
  padding: 48px 0 80px;
}
.doc {
  width: min(820px, 100% - 40px);
  margin-inline: auto;
  padding: 44px 48px 52px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: 0 30px 70px -50px rgba(11, 60, 66, 0.5);
}
.doc .back {
  display: inline-block;
  margin-bottom: 20px;
  font-size: 14px;
}
.doc h1 {
  margin: 0 0 10px;
  font-size: clamp(28px, 4vw, 38px);
  line-height: 1.3;
}
.doc .meta {
  margin: 0 0 28px;
  font-size: 14px;
  color: var(--ink-mute);
}
.doc h2 {
  margin: 40px 0 12px;
  padding-top: 8px;
  font-size: 21px;
  line-height: 1.45;
}
.doc p,
.doc li {
  color: #2c3b41;
}
.doc p {
  margin: 0 0 14px;
}
.doc ul,
.doc ol {
  margin: 0 0 14px;
  padding-left: 1.4em;
}
.doc li {
  margin-bottom: 6px;
}
.doc code {
  padding: 1px 6px;
  font-size: 0.9em;
  background: #eef4f3;
  border-radius: 6px;
  word-break: break-all;
}
.doc .notice {
  margin: 0 0 28px;
  padding: 16px 20px;
  background: var(--teal-soft);
  border-left: 4px solid var(--teal);
  border-radius: 12px;
}
.doc .notice p {
  margin: 0;
  color: #124c52;
}

/* ---------- 404 ---------- */
.not-found {
  display: grid;
  place-items: center;
  min-height: 70vh;
  padding: 40px 20px;
  text-align: center;
}
.not-found h1 {
  margin: 0 0 8px;
  font-size: 64px;
  line-height: 1.1;
}
.not-found p {
  margin: 0 0 24px;
  color: var(--ink-soft);
}

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .hero .container {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }
  .hero .lede {
    margin-inline: auto;
  }
  .chips,
  .cta-row {
    justify-content: center;
  }
  .highlights {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .privacy-band {
    grid-template-columns: 1fr;
    padding: 34px 28px;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 15.5px;
  }
  .hero {
    padding: 44px 0 36px;
  }
  .section {
    padding: 52px 0;
  }
  .nav a {
    padding: 6px 10px;
    font-size: 14px;
  }
  .nav a.hide-sm {
    display: none;
  }
  .highlights,
  .feature-grid,
  .steps {
    grid-template-columns: 1fr;
  }
  .btn {
    width: 100%;
  }
  .doc {
    padding: 28px 22px 36px;
    border-radius: 22px;
  }
  .doc-wrap {
    padding: 24px 0 56px;
  }
  .footer .container {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    transition: none !important;
  }
}