/* ==========================================================
   提词器大师官网
   品牌色：#FEE60D（高饱和黄）+ 墨黑
   全部资源本地化，无外部 CDN 依赖
   ========================================================== */

:root {
  --yellow:       oklch(0.91 0.19 102);        /* #FEE60D */
  --yellow-deep:  oklch(0.84 0.18 98);
  --ink:          oklch(0.24 0.02 102);        /* 带黄调的墨黑 */
  --ink-soft:     oklch(0.42 0.02 102);
  --paper:        oklch(0.985 0.012 102);      /* 米白纸面 */
  --paper-warm:   oklch(0.955 0.03 102);
  --line:         oklch(0.88 0.02 102);

  --space-xs: 8px;
  --space-sm: 12px;
  --space-md: 24px;
  --space-lg: 48px;
  --space-xl: 96px;

  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

.container {
  width: min(1120px, calc(100% - 48px));
  margin-inline: auto;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: 999px;
  font-size: 17px;
  font-weight: 600;
  text-decoration: none;
  transition: transform .25s cubic-bezier(.22,1,.36,1), box-shadow .25s;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn .ico { width: 22px; height: 22px; flex: none; }

.btn-ink {
  background: var(--ink);
  color: var(--yellow);
  box-shadow: 0 4px 0 oklch(0.14 0.01 102);
}
.btn-ink:hover { box-shadow: 0 6px 0 oklch(0.14 0.01 102); }

.btn-outline {
  border: 2px solid var(--ink);
  color: var(--ink);
  background: transparent;
}
.btn-outline:hover { background: oklch(0.91 0.19 102 / .35); }

.btn-yellow {
  background: var(--yellow);
  color: var(--ink);
  box-shadow: 0 4px 0 var(--yellow-deep);
}
.btn-yellow:hover { box-shadow: 0 6px 0 var(--yellow-deep); }

.btn-sm { padding: 10px 22px; font-size: 15px; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--yellow);
  border-bottom: 2px solid var(--ink);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  height: 72px;
}
.brand img { height: 40px; width: auto; }
.site-nav {
  display: flex;
  gap: var(--space-md);
  margin-left: auto;
}
.site-nav a {
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
  font-size: 16px;
  padding: 6px 2px;
  border-bottom: 3px solid transparent;
  transition: border-color .2s;
}
.site-nav a:hover { border-bottom-color: var(--ink); }

/* ---------- Hero ---------- */
.hero {
  background: var(--yellow);
  overflow: hidden;
  padding-block: 0;
}
.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  align-items: center;
  gap: var(--space-lg);
  padding-block: clamp(48px, 8vw, 110px) 0;
}
.hero-kicker {
  display: inline-block;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .35em;
  background: var(--ink);
  color: var(--yellow);
  padding: 6px 14px 6px 18px;
  margin-bottom: var(--space-md);
}
.hero-title {
  font-size: clamp(34px, 4.6vw, 56px);
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: .02em;
}
.hero-title em {
  font-style: normal;
  position: relative;
  white-space: nowrap;
}
/* 手绘感下划线 */
.hero-title em::after {
  content: "";
  position: absolute;
  left: -2%;
  bottom: 4px;
  width: 104%;
  height: .28em;
  background: var(--paper);
  z-index: -1;
  transform: skewX(-12deg) rotate(-1deg);
}
.hero-sub {
  margin-top: var(--space-md);
  font-size: clamp(16px, 1.6vw, 19px);
  color: var(--ink);
  max-width: 30em;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
}
.hero-note {
  margin-top: var(--space-sm);
  font-size: 14px;
  color: oklch(0.36 0.04 102);
}
.hero-visual {
  align-self: end;
  position: relative;
  height: clamp(320px, 29vw, 540px);
  overflow: hidden;
  /* 向右出血到视口边缘，手臂在屏幕边缘被自然裁切 */
  margin-right: calc(-1 * (100vw - min(1120px, 100vw - 48px)) / 2);
}
.hero-visual img {
  position: absolute;
  right: 0;
  bottom: 0;
  height: 100%;
  width: auto;
  max-width: none;
  animation: hero-in 1s cubic-bezier(.22,1,.36,1) both;
}
@keyframes hero-in {
  from { opacity: 0; transform: translateX(60px); }
  to   { opacity: 1; transform: none; }
}

/* ---------- 通用板块头 ---------- */
section { padding-block: var(--space-xl); }

.sec-head {
  max-width: 640px;
  margin-bottom: var(--space-lg);
}
.sec-head h2 {
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 900;
  line-height: 1.35;
}
.sec-head p {
  margin-top: var(--space-xs);
  color: var(--ink-soft);
  font-size: 17px;
}

/* ---------- 功能特色 ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: var(--space-lg) var(--space-md);
}
/* 错落节奏：偶数列下沉 */
@media (min-width: 980px) {
  .feature:nth-child(even) { margin-top: var(--space-lg); }
}
.feature .shot {
  border: 2px solid var(--ink);
  border-radius: 28px;
  overflow: hidden;
  background: var(--yellow);
  box-shadow: 8px 8px 0 var(--paper-warm);
  transition: transform .3s cubic-bezier(.22,1,.36,1), box-shadow .3s;
}
.feature:hover .shot {
  transform: translate(-4px, -4px);
  box-shadow: 12px 12px 0 var(--yellow);
}
.feature h3 {
  margin-top: var(--space-md);
  font-size: 20px;
  font-weight: 800;
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.feature .no {
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  background: var(--yellow);
  padding: 1px 8px;
}
.feature p {
  margin-top: 6px;
  color: var(--ink-soft);
  font-size: 15px;
}

/* ---------- 用户评价 ---------- */
.reviews {
  background: var(--paper-warm);
}
.review-wall {
  border: 2px solid var(--ink);
  border-radius: 20px;
  overflow: hidden;
  background: white;
  box-shadow: 10px 10px 0 var(--yellow);
}

/* ---------- 下载 ---------- */
.download {
  background: var(--ink);
  color: var(--paper);
}
.download-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
}
.download h2 {
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 900;
  color: var(--yellow);
}
.download-copy > p {
  margin-top: var(--space-xs);
  color: oklch(0.78 0.03 102);
  font-size: 17px;
}
.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
}
.qr-card {
  background: var(--paper);
  color: var(--ink);
  border-radius: 20px;
  padding: var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-md);
  box-shadow: 8px 8px 0 oklch(0.91 0.19 102 / .45);
}
.qr-card img {
  width: 130px;
  height: 130px;
  image-rendering: pixelated;
}
.qr-card p {
  font-weight: 700;
  font-size: 18px;
  line-height: 1.6;
}

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--ink);
  border-top: 1px solid oklch(0.34 0.02 102);
  padding-block: var(--space-md);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
}
.footer-nav { display: flex; gap: var(--space-md); }
.footer-nav a,
.beian a {
  color: oklch(0.72 0.02 102);
  text-decoration: none;
  font-size: 14px;
}
.footer-nav a:hover,
.beian a:hover { color: var(--yellow); }

/* ---------- 进场动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .7s cubic-bezier(.22,1,.36,1), transform .7s cubic-bezier(.22,1,.36,1);
}
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero-visual img { animation: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 860px) {
  .site-nav { display: none; }
  .header-inner { justify-content: space-between; }

  .hero-inner {
    grid-template-columns: 1fr;
    padding-top: var(--space-lg);
  }
  .hero-visual { order: 2; height: clamp(240px, 58vw, 380px); margin-right: -24px; }

  section { padding-block: var(--space-lg); }

  .download-inner { justify-content: center; text-align: center; }
  .download-copy .download-actions { justify-content: center; }
}